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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * PRU-ICSS sub-system specific definitions
4 *
5 * Copyright (C) 2014-2020 Texas Instruments Incorporated - http://www.ti.com/
6 * Suman Anna <[email protected]>
7 */
8
9#ifndef _PRUSS_DRIVER_H_
10#define _PRUSS_DRIVER_H_
11
12#include <linux/mutex.h>
13#include <linux/remoteproc/pruss.h>
14#include <linux/types.h>
15#include <linux/err.h>
16
17/*
18 * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the
19 * PRUSS_GPCFG0/1 registers
20 *
21 * NOTE: The below defines are the most common values, but there
22 * are some exceptions like on 66AK2G, where the RESERVED and MII2
23 * values are interchanged. Also, this bit-field does not exist on
24 * AM335x SoCs
25 */
26enum pruss_gp_mux_sel {
27 PRUSS_GP_MUX_SEL_GP,
28 PRUSS_GP_MUX_SEL_ENDAT,
29 PRUSS_GP_MUX_SEL_RESERVED,
30 PRUSS_GP_MUX_SEL_SD,
31 PRUSS_GP_MUX_SEL_MII2,
32 PRUSS_GP_MUX_SEL_MAX,
33};
34
35/*
36 * enum pruss_gpi_mode - PRUSS GPI configuration modes, used
37 * to program the PRUSS_GPCFG0/1 registers
38 */
39enum pruss_gpi_mode {
40 PRUSS_GPI_MODE_DIRECT,
41 PRUSS_GPI_MODE_PARALLEL,
42 PRUSS_GPI_MODE_28BIT_SHIFT,
43 PRUSS_GPI_MODE_MII,
44 PRUSS_GPI_MODE_MAX,
45};
46
47/**
48 * enum pru_type - PRU core type identifier
49 *
50 * @PRU_TYPE_PRU: Programmable Real-time Unit
51 * @PRU_TYPE_RTU: Auxiliary Programmable Real-Time Unit
52 * @PRU_TYPE_TX_PRU: Transmit Programmable Real-Time Unit
53 * @PRU_TYPE_MAX: just keep this one at the end
54 */
55enum pru_type {
56 PRU_TYPE_PRU,
57 PRU_TYPE_RTU,
58 PRU_TYPE_TX_PRU,
59 PRU_TYPE_MAX,
60};
61
62/*
63 * enum pruss_mem - PRUSS memory range identifiers
64 */
65enum pruss_mem {
66 PRUSS_MEM_DRAM0 = 0,
67 PRUSS_MEM_DRAM1,
68 PRUSS_MEM_SHRD_RAM2,
69 PRUSS_MEM_MAX,
70};
71
72/**
73 * struct pruss_mem_region - PRUSS memory region structure
74 * @va: kernel virtual address of the PRUSS memory region
75 * @pa: physical (bus) address of the PRUSS memory region
76 * @size: size of the PRUSS memory region
77 */
78struct pruss_mem_region {
79 void __iomem *va;
80 phys_addr_t pa;
81 size_t size;
82};
83
84/**
85 * struct pruss - PRUSS parent structure
86 * @dev: pruss device pointer
87 * @cfg_base: base iomap for CFG region
88 * @cfg_regmap: regmap for config region
89 * @mem_regions: data for each of the PRUSS memory regions
90 * @mem_in_use: to indicate if memory resource is in use
91 * @lock: mutex to serialize access to resources
92 * @core_clk_mux: clk handle for PRUSS CORE_CLK_MUX
93 * @iep_clk_mux: clk handle for PRUSS IEP_CLK_MUX
94 */
95struct pruss {
96 struct device *dev;
97 void __iomem *cfg_base;
98 struct regmap *cfg_regmap;
99 struct pruss_mem_region mem_regions[PRUSS_MEM_MAX];
100 struct pruss_mem_region *mem_in_use[PRUSS_MEM_MAX];
101 struct mutex lock; /* PRU resource lock */
102 struct clk *core_clk_mux;
103 struct clk *iep_clk_mux;
104};
105
106#if IS_ENABLED(CONFIG_TI_PRUSS)
107
108struct pruss *pruss_get(struct rproc *rproc);
109void pruss_put(struct pruss *pruss);
110int pruss_request_mem_region(struct pruss *pruss, enum pruss_mem mem_id,
111 struct pruss_mem_region *region);
112int pruss_release_mem_region(struct pruss *pruss,
113 struct pruss_mem_region *region);
114int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux);
115int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux);
116int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id,
117 enum pruss_gpi_mode mode);
118int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable);
119int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type,
120 bool enable);
121
122#else
123
124static inline struct pruss *pruss_get(struct rproc *rproc)
125{
126 return ERR_PTR(-EOPNOTSUPP);
127}
128
129static inline void pruss_put(struct pruss *pruss) { }
130
131static inline int pruss_request_mem_region(struct pruss *pruss,
132 enum pruss_mem mem_id,
133 struct pruss_mem_region *region)
134{
135 return -EOPNOTSUPP;
136}
137
138static inline int pruss_release_mem_region(struct pruss *pruss,
139 struct pruss_mem_region *region)
140{
141 return -EOPNOTSUPP;
142}
143
144static inline int pruss_cfg_get_gpmux(struct pruss *pruss,
145 enum pruss_pru_id pru_id, u8 *mux)
146{
147 return -EOPNOTSUPP;
148}
149
150static inline int pruss_cfg_set_gpmux(struct pruss *pruss,
151 enum pruss_pru_id pru_id, u8 mux)
152{
153 return -EOPNOTSUPP;
154}
155
156static inline int pruss_cfg_gpimode(struct pruss *pruss,
157 enum pruss_pru_id pru_id,
158 enum pruss_gpi_mode mode)
159{
160 return -EOPNOTSUPP;
161}
162
163static inline int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable)
164{
165 return -EOPNOTSUPP;
166}
167
168static inline int pruss_cfg_xfr_enable(struct pruss *pruss,
169 enum pru_type pru_type,
170 bool enable)
171{
172 return -EOPNOTSUPP;
173}
174
175#endif /* CONFIG_TI_PRUSS */
176
177#endif /* _PRUSS_DRIVER_H_ */