1 files changed, 87 insertions, 0 deletions
diff --git a/sound/soc/sof/starfive/dsp.h b/sound/soc/sof/starfive/dsp.h
new file mode 100644
index 000000000000..40165068d1ef
--- /dev/null
+++ b/sound/soc/sof/starfive/dsp.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * DSP IPC driver for the StarFive JH7110 SoC
+ *
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ */
+
+#ifndef _STARFIVE_DSP_IPC_H
+#define _STARFIVE_DSP_IPC_H
+
+#include <linux/device.h>
+#include <linux/mailbox_client.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+
+#define DSP_MU_CHAN_NUM		2
+
+struct jh7110_dsp_chan {
+	struct jh7110_dsp_ipc *ipc;
+	struct mbox_client cl;
+	struct mbox_chan *ch;
+	char *name;
+	int idx;
+};
+
+struct jh7110_dsp_rx_work {
+	struct work_struct rx_work;
+	u32 data;
+};
+
+struct jh7110_dsp_ops {
+	void (*handle_reply)(struct jh7110_dsp_ipc *ipc);
+	void (*handle_request)(struct jh7110_dsp_ipc *ipc);
+};
+
+struct jh7110_dsp_ipc {
+	/* Host <-> DSP communication uses 1 tx and 1 rx channels */
+	struct jh7110_dsp_chan chans[DSP_MU_CHAN_NUM];
+	struct device *dev;
+	struct jh7110_dsp_ops *ops;
+	struct workqueue_struct *dsp_ipc_wq;
+	struct jh7110_dsp_rx_work work;
+	u32 request_cnt;
+	u32 reply_cnt;
+	void *private_data;
+};
+
+static inline void jh7110_dsp_set_data(struct jh7110_dsp_ipc *ipc, void *data)
+{
+	if (!ipc)
+		return;
+
+	ipc->private_data = data;
+}
+
+static inline void *jh7110_dsp_get_data(struct jh7110_dsp_ipc *ipc)
+{
+	if (!ipc)
+		return NULL;
+
+	return ipc->private_data;
+}
+
+#if IS_ENABLED(CONFIG_STARFIVE_DSP)
+
+int jh7110_dsp_ring_doorbell(struct jh7110_dsp_ipc *dsp, unsigned int is_ack);
+
+struct mbox_chan *jh7110_dsp_request_channel(struct jh7110_dsp_ipc *ipc, int idx);
+void jh7110_dsp_free_channel(struct jh7110_dsp_ipc *ipc, int idx);
+
+#else
+
+static inline int jh7110_dsp_ring_doorbell(struct jh7110_dsp_ipc *ipc,
+					unsigned int is_ack)
+{
+	return -ENOTSUPP;
+}
+
+struct mbox_chan *jh7110_dsp_request_channel(struct jh7110_dsp_ipc *ipc, int idx)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+void jh7110_dsp_free_channel(struct jh7110_dsp_ipc *ipc, int idx) { }
+
+#endif
+#endif /* _STARFIVE_DSP_IPC_H */