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firmware: mediatek: Add adsp ipc protocol interface

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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>
This commit is contained in:
TingHan Shen
2022-05-12 16:22:13 +08:00
committed by Mark Brown
parent fd4b80044b
commit 9db69df4bd
4 changed files with 232 additions and 0 deletions
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65
include/linux/firmware/mediatek/mtk-adsp-ipc.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2022 MediaTek Inc.
*/
#ifndef MTK_ADSP_IPC_H
#define MTK_ADSP_IPC_H
#include <linux/device.h>
#include <linux/types.h>
#include <linux/mailbox_controller.h>
#include <linux/mailbox_client.h>
#define MTK_ADSP_IPC_REQ 0
#define MTK_ADSP_IPC_RSP 1
#define MTK_ADSP_IPC_OP_REQ 0x1
#define MTK_ADSP_IPC_OP_RSP 0x2
enum {
MTK_ADSP_MBOX_REPLY,
MTK_ADSP_MBOX_REQUEST,
MTK_ADSP_MBOX_NUM,
};
struct mtk_adsp_ipc;
struct mtk_adsp_ipc_ops {
void (*handle_reply)(struct mtk_adsp_ipc *ipc);
void (*handle_request)(struct mtk_adsp_ipc *ipc);
};
struct mtk_adsp_chan {
struct mtk_adsp_ipc *ipc;
struct mbox_client cl;
struct mbox_chan *ch;
char *name;
int idx;
};
struct mtk_adsp_ipc {
struct mtk_adsp_chan chans[MTK_ADSP_MBOX_NUM];
struct device *dev;
struct mtk_adsp_ipc_ops *ops;
void *private_data;
};
static inline void mtk_adsp_ipc_set_data(struct mtk_adsp_ipc *ipc, void *data)
{
if (!ipc)
return;
ipc->private_data = data;
}
static inline void *mtk_adsp_ipc_get_data(struct mtk_adsp_ipc *ipc)
{
if (!ipc)
return NULL;
return ipc->private_data;
}
int mtk_adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t op);
#endif /* MTK_ADSP_IPC_H */