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Some of mediatek processors contain the Tensilica HiFix DSP for audio processing. The communication between Host CPU and DSP firmware is taking place using a shared memory area for message passing. ADSP IPC protocol offers (send/recv) interfaces using mediatek-mailbox APIs. We use two mbox channels to implement a request-reply protocol. Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com> Signed-off-by: TingHan Shen <tinghan.shen@mediatek.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Curtis Malainey <cujomalainey@chromium.org> Reviewed-by: Tzung-Bi Shih <tzungbi@google.com> Reviewed-by: YC Hung <yc.hung@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20220512082215.3018-2-tinghan.shen@mediatek.com Signed-off-by: Mark Brown <broonie@kernel.org>
66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2022 MediaTek Inc.
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*/
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#ifndef MTK_ADSP_IPC_H
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#define MTK_ADSP_IPC_H
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#include <linux/device.h>
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#include <linux/types.h>
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#include <linux/mailbox_controller.h>
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#include <linux/mailbox_client.h>
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#define MTK_ADSP_IPC_REQ 0
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#define MTK_ADSP_IPC_RSP 1
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#define MTK_ADSP_IPC_OP_REQ 0x1
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#define MTK_ADSP_IPC_OP_RSP 0x2
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enum {
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MTK_ADSP_MBOX_REPLY,
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MTK_ADSP_MBOX_REQUEST,
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MTK_ADSP_MBOX_NUM,
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};
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struct mtk_adsp_ipc;
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struct mtk_adsp_ipc_ops {
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void (*handle_reply)(struct mtk_adsp_ipc *ipc);
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void (*handle_request)(struct mtk_adsp_ipc *ipc);
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};
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struct mtk_adsp_chan {
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struct mtk_adsp_ipc *ipc;
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struct mbox_client cl;
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struct mbox_chan *ch;
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char *name;
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int idx;
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};
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struct mtk_adsp_ipc {
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struct mtk_adsp_chan chans[MTK_ADSP_MBOX_NUM];
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struct device *dev;
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struct mtk_adsp_ipc_ops *ops;
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void *private_data;
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};
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static inline void mtk_adsp_ipc_set_data(struct mtk_adsp_ipc *ipc, void *data)
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{
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if (!ipc)
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return;
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ipc->private_data = data;
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}
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static inline void *mtk_adsp_ipc_get_data(struct mtk_adsp_ipc *ipc)
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{
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if (!ipc)
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return NULL;
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return ipc->private_data;
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}
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int mtk_adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t op);
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#endif /* MTK_ADSP_IPC_H */
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