1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright 2019 NXP 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Header file for the DSP IPC implementation 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef _IMX_DSP_IPC_H 9*4882a593Smuzhiyun #define _IMX_DSP_IPC_H 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <linux/device.h> 12*4882a593Smuzhiyun #include <linux/types.h> 13*4882a593Smuzhiyun #include <linux/mailbox_client.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #define DSP_MU_CHAN_NUM 4 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun struct imx_dsp_chan { 18*4882a593Smuzhiyun struct imx_dsp_ipc *ipc; 19*4882a593Smuzhiyun struct mbox_client cl; 20*4882a593Smuzhiyun struct mbox_chan *ch; 21*4882a593Smuzhiyun char *name; 22*4882a593Smuzhiyun int idx; 23*4882a593Smuzhiyun }; 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun struct imx_dsp_ops { 26*4882a593Smuzhiyun void (*handle_reply)(struct imx_dsp_ipc *ipc); 27*4882a593Smuzhiyun void (*handle_request)(struct imx_dsp_ipc *ipc); 28*4882a593Smuzhiyun }; 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun struct imx_dsp_ipc { 31*4882a593Smuzhiyun /* Host <-> DSP communication uses 2 txdb and 2 rxdb channels */ 32*4882a593Smuzhiyun struct imx_dsp_chan chans[DSP_MU_CHAN_NUM]; 33*4882a593Smuzhiyun struct device *dev; 34*4882a593Smuzhiyun struct imx_dsp_ops *ops; 35*4882a593Smuzhiyun void *private_data; 36*4882a593Smuzhiyun }; 37*4882a593Smuzhiyun imx_dsp_set_data(struct imx_dsp_ipc * ipc,void * data)38*4882a593Smuzhiyunstatic inline void imx_dsp_set_data(struct imx_dsp_ipc *ipc, void *data) 39*4882a593Smuzhiyun { 40*4882a593Smuzhiyun if (!ipc) 41*4882a593Smuzhiyun return; 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun ipc->private_data = data; 44*4882a593Smuzhiyun } 45*4882a593Smuzhiyun imx_dsp_get_data(struct imx_dsp_ipc * ipc)46*4882a593Smuzhiyunstatic inline void *imx_dsp_get_data(struct imx_dsp_ipc *ipc) 47*4882a593Smuzhiyun { 48*4882a593Smuzhiyun if (!ipc) 49*4882a593Smuzhiyun return NULL; 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun return ipc->private_data; 52*4882a593Smuzhiyun } 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_IMX_DSP) 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun int imx_dsp_ring_doorbell(struct imx_dsp_ipc *dsp, unsigned int chan_idx); 57*4882a593Smuzhiyun 58*4882a593Smuzhiyun #else 59*4882a593Smuzhiyun imx_dsp_ring_doorbell(struct imx_dsp_ipc * ipc,unsigned int chan_idx)60*4882a593Smuzhiyunstatic inline int imx_dsp_ring_doorbell(struct imx_dsp_ipc *ipc, 61*4882a593Smuzhiyun unsigned int chan_idx) 62*4882a593Smuzhiyun { 63*4882a593Smuzhiyun return -ENOTSUPP; 64*4882a593Smuzhiyun } 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun #endif 67*4882a593Smuzhiyun #endif /* _IMX_DSP_IPC_H */ 68