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5b45759c0b
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Acked-by: Dinh Nguyen <dinguyen@kernel.org> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Link: https://lore.kernel.org/r/20230803-dt-header-cleanups-for-soc-v2-17-d8de2cc88bff@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de>
144 lines
3.4 KiB
C
144 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2022 MediaTek Corporation. All rights reserved.
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* Author: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
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*/
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#include <linux/firmware/mediatek/mtk-adsp-ipc.h>
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#include <linux/kernel.h>
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#include <linux/mailbox_client.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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static const char * const adsp_mbox_ch_names[MTK_ADSP_MBOX_NUM] = { "rx", "tx" };
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/*
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* mtk_adsp_ipc_send - send ipc cmd to MTK ADSP
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*
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* @ipc: ADSP IPC handle
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* @idx: index of the mailbox channel
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* @msg: IPC cmd (reply or request)
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*
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* Returns zero for success from mbox_send_message
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* negative value for error
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*/
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int mtk_adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t msg)
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{
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struct mtk_adsp_chan *adsp_chan;
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int ret;
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if (idx >= MTK_ADSP_MBOX_NUM)
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return -EINVAL;
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adsp_chan = &ipc->chans[idx];
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ret = mbox_send_message(adsp_chan->ch, &msg);
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if (ret < 0)
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return ret;
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return 0;
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}
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EXPORT_SYMBOL_GPL(mtk_adsp_ipc_send);
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/*
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* mtk_adsp_ipc_recv - recv callback used by MTK ADSP mailbox
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*
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* @c: mbox client
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* @msg: message received
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*
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* Users of ADSP IPC will need to privde handle_reply and handle_request
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* callbacks.
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*/
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static void mtk_adsp_ipc_recv(struct mbox_client *c, void *msg)
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{
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struct mtk_adsp_chan *chan = container_of(c, struct mtk_adsp_chan, cl);
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struct device *dev = c->dev;
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switch (chan->idx) {
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case MTK_ADSP_MBOX_REPLY:
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chan->ipc->ops->handle_reply(chan->ipc);
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break;
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case MTK_ADSP_MBOX_REQUEST:
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chan->ipc->ops->handle_request(chan->ipc);
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break;
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default:
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dev_err(dev, "wrong mbox chan %d\n", chan->idx);
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break;
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}
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}
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static int mtk_adsp_ipc_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct mtk_adsp_ipc *adsp_ipc;
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struct mtk_adsp_chan *adsp_chan;
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struct mbox_client *cl;
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int ret;
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int i, j;
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device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent);
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adsp_ipc = devm_kzalloc(dev, sizeof(*adsp_ipc), GFP_KERNEL);
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if (!adsp_ipc)
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return -ENOMEM;
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for (i = 0; i < MTK_ADSP_MBOX_NUM; i++) {
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adsp_chan = &adsp_ipc->chans[i];
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cl = &adsp_chan->cl;
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cl->dev = dev->parent;
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cl->tx_block = false;
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cl->knows_txdone = false;
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cl->tx_prepare = NULL;
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cl->rx_callback = mtk_adsp_ipc_recv;
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adsp_chan->ipc = adsp_ipc;
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adsp_chan->idx = i;
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adsp_chan->ch = mbox_request_channel_byname(cl, adsp_mbox_ch_names[i]);
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if (IS_ERR(adsp_chan->ch)) {
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ret = PTR_ERR(adsp_chan->ch);
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if (ret != -EPROBE_DEFER)
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dev_err(dev, "Failed to request mbox chan %s ret %d\n",
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adsp_mbox_ch_names[i], ret);
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for (j = 0; j < i; j++) {
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adsp_chan = &adsp_ipc->chans[j];
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mbox_free_channel(adsp_chan->ch);
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}
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return ret;
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}
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}
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adsp_ipc->dev = dev;
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dev_set_drvdata(dev, adsp_ipc);
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dev_dbg(dev, "MTK ADSP IPC initialized\n");
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return 0;
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}
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static int mtk_adsp_ipc_remove(struct platform_device *pdev)
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{
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struct mtk_adsp_ipc *adsp_ipc = dev_get_drvdata(&pdev->dev);
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struct mtk_adsp_chan *adsp_chan;
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int i;
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for (i = 0; i < MTK_ADSP_MBOX_NUM; i++) {
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adsp_chan = &adsp_ipc->chans[i];
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mbox_free_channel(adsp_chan->ch);
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}
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return 0;
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}
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static struct platform_driver mtk_adsp_ipc_driver = {
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.driver = {
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.name = "mtk-adsp-ipc",
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},
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.probe = mtk_adsp_ipc_probe,
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.remove = mtk_adsp_ipc_remove,
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};
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builtin_platform_driver(mtk_adsp_ipc_driver);
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MODULE_AUTHOR("Allen-KH Cheng <allen-kh.cheng@mediatek.com>");
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MODULE_DESCRIPTION("MTK ADSP IPC Driver");
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MODULE_LICENSE("GPL");
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