rpmsg: add rpmsg support for mt8183 SCP.

Add a simple rpmsg support for mt8183 SCP, that use IPI / IPC directly.

Pi-Hsun Shih committed 7 years ago

Commit 70179961 parent 63c13d69 files · +525 −5Browse files

Showing the changes to include/linux (2 of 9 files). Show all

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2 files

@@ -41,7 +41,8 @@ enum scp_ipi_id { · 40 unmodified lines
41	41	SCP_IPI_ISP_FRAME,
42	42	SCP_IPI_FD_CMD,
43	43	SCP_IPI_CROS_HOST_CMD,
44		− SCP_IPI_MAX,
	44	+ SCP_IPI_NS_SERVICE = 0xFF,
	45	+ SCP_IPI_MAX = 0x100,
45	46	};
46	47
47	48	struct mtk_scp scp_get(struct platform_device pdev);

@@ -0,0 +1,38 @@
	1	+/* SPDX-License-Identifier: GPL-2.0 */
	2	+/*
	3	+ * Copyright 2019 Google LLC.
	4	+ */
	5	+
	6	+#ifndef __LINUX_RPMSG_MTK_RPMSG_H
	7	+#define __LINUX_RPMSG_MTK_RPMSG_H
	8	+
	9	+#include <linux/platform_device.h>
	10	+#include <linux/remoteproc.h>
	11	+
	12	+typedef void (ipi_handler_t)(void data, unsigned int len, void *priv);
	13	+
	14	+/*
	15	+ * struct mtk_rpmsg_info - IPI functions tied to the rpmsg device.
	16	+ * @register_ipi: register IPI handler for an IPI id.
	17	+ * @unregister_ipi: unregister IPI handler for a registered IPI id.
	18	+ * @send_ipi: send IPI to an IPI id. wait is the timeout (in msecs) to wait
	19	+ * until response, or 0 if there's no timeout.
	20	+ * @ns_ipi_id: the IPI id used for name service, or -1 if name service isn't
	21	+ * supported.
	22	+ */
	23	+struct mtk_rpmsg_info {
	24	+ int (register_ipi)(struct platform_device pdev, u32 id,
	25	+ ipi_handler_t handler, void *priv);
	26	+ void (unregister_ipi)(struct platform_device pdev, u32 id);
	27	+ int (send_ipi)(struct platform_device pdev, u32 id,
	28	+ void *buf, unsigned int len, unsigned int wait);
	29	+ int ns_ipi_id;
	30	+};
	31	+
	32	+struct rproc_subdev *
	33	+mtk_rpmsg_create_rproc_subdev(struct platform_device *pdev,
	34	+ struct mtk_rpmsg_info *info);
	35	+
	36	+void mtk_rpmsg_destroy_rproc_subdev(struct rproc_subdev *subdev);
	37	+
	38	+#endif

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