1 /* SPDX-License-Identifier: GPL-2.0+ */
5 * Header file for the DSP IPC implementation
11 #include <linux/device.h>
12 #include <linux/types.h>
13 #include <linux/mailbox_client.h>
15 #define DSP_MU_CHAN_NUM 4
18 struct imx_dsp_ipc *ipc;
19 struct mbox_client cl;
26 void (*handle_reply)(struct imx_dsp_ipc *ipc);
27 void (*handle_request)(struct imx_dsp_ipc *ipc);
31 /* Host <-> DSP communication uses 2 txdb and 2 rxdb channels */
32 struct imx_dsp_chan chans[DSP_MU_CHAN_NUM];
34 struct imx_dsp_ops *ops;
38 static inline void imx_dsp_set_data(struct imx_dsp_ipc *ipc, void *data)
40 ipc->private_data = data;
43 static inline void *imx_dsp_get_data(struct imx_dsp_ipc *ipc)
45 return ipc->private_data;
48 #if IS_ENABLED(CONFIG_IMX_DSP)
50 int imx_dsp_ring_doorbell(struct imx_dsp_ipc *dsp, unsigned int chan_idx);
52 struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *ipc, int idx);
53 void imx_dsp_free_channel(struct imx_dsp_ipc *ipc, int idx);
57 static inline int imx_dsp_ring_doorbell(struct imx_dsp_ipc *ipc,
58 unsigned int chan_idx)
63 struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *ipc, int idx)
65 return ERR_PTR(-EOPNOTSUPP);
68 void imx_dsp_free_channel(struct imx_dsp_ipc *ipc, int idx) { }
71 #endif /* _IMX_DSP_IPC_H */