1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (c) 2019 MediaTek Inc.
4  */
5 
6 #ifndef __RPROC_MTK_COMMON_H
7 #define __RPROC_MTK_COMMON_H
8 
9 #include <linux/interrupt.h>
10 #include <linux/kernel.h>
11 #include <linux/platform_device.h>
12 #include <linux/remoteproc.h>
13 #include <linux/remoteproc/mtk_scp.h>
14 
15 #define MT8183_SW_RSTN			0x0
16 #define MT8183_SW_RSTN_BIT		BIT(0)
17 #define MT8183_SCP_TO_HOST		0x1C
18 #define MT8183_SCP_IPC_INT_BIT		BIT(0)
19 #define MT8183_SCP_WDT_INT_BIT		BIT(8)
20 #define MT8183_HOST_TO_SCP		0x28
21 #define MT8183_HOST_IPC_INT_BIT		BIT(0)
22 #define MT8183_WDT_CFG			0x84
23 #define MT8183_SCP_CLK_SW_SEL		0x4000
24 #define MT8183_SCP_CLK_DIV_SEL		0x4024
25 #define MT8183_SCP_SRAM_PDN		0x402C
26 #define MT8183_SCP_L1_SRAM_PD		0x4080
27 #define MT8183_SCP_TCM_TAIL_SRAM_PD	0x4094
28 
29 #define MT8183_SCP_CACHE_SEL(x)		(0x14000 + (x) * 0x3000)
30 #define MT8183_SCP_CACHE_CON		MT8183_SCP_CACHE_SEL(0)
31 #define MT8183_SCP_DCACHE_CON		MT8183_SCP_CACHE_SEL(1)
32 #define MT8183_SCP_CACHESIZE_8KB	BIT(8)
33 #define MT8183_SCP_CACHE_CON_WAYEN	BIT(10)
34 
35 #define SCP_FW_VER_LEN			32
36 #define SCP_SHARE_BUFFER_SIZE		288
37 
38 struct scp_run {
39 	u32 signaled;
40 	s8 fw_ver[SCP_FW_VER_LEN];
41 	u32 dec_capability;
42 	u32 enc_capability;
43 	wait_queue_head_t wq;
44 };
45 
46 struct scp_ipi_desc {
47 	/* For protecting handler. */
48 	struct mutex lock;
49 	scp_ipi_handler_t handler;
50 	void *priv;
51 };
52 
53 struct mtk_scp {
54 	struct device *dev;
55 	struct rproc *rproc;
56 	struct clk *clk;
57 	void __iomem *reg_base;
58 	void __iomem *sram_base;
59 	size_t sram_size;
60 
61 	struct mtk_share_obj __iomem *recv_buf;
62 	struct mtk_share_obj __iomem *send_buf;
63 	struct scp_run run;
64 	/* To prevent multiple ipi_send run concurrently. */
65 	struct mutex send_lock;
66 	struct scp_ipi_desc ipi_desc[SCP_IPI_MAX];
67 	bool ipi_id_ack[SCP_IPI_MAX];
68 	wait_queue_head_t ack_wq;
69 
70 	void __iomem *cpu_addr;
71 	phys_addr_t phys_addr;
72 	size_t dram_size;
73 
74 	struct rproc_subdev *rpmsg_subdev;
75 };
76 
77 /**
78  * struct mtk_share_obj - SRAM buffer shared with AP and SCP
79  *
80  * @id:		IPI id
81  * @len:	share buffer length
82  * @share_buf:	share buffer data
83  */
84 struct mtk_share_obj {
85 	u32 id;
86 	u32 len;
87 	u8 share_buf[SCP_SHARE_BUFFER_SIZE];
88 };
89 
90 void scp_memcpy_aligned(void __iomem *dst, const void *src, unsigned int len);
91 void scp_ipi_lock(struct mtk_scp *scp, u32 id);
92 void scp_ipi_unlock(struct mtk_scp *scp, u32 id);
93 
94 #endif
95