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"Das U-Boot" Source Tree
1/* SPDX-License-Identifier: GPL-2.0+ */
2
3#ifndef __TI_PRUSS_H
4#define __TI_PRUSS_H
5
6/*
7 * PRU_ICSS_CFG registers
8 * SYSCFG, ISRP, ISP, IESP, IECP, SCRP applicable on AMxxxx devices only
9 */
10#define PRUSS_CFG_REVID 0x00
11#define PRUSS_CFG_SYSCFG 0x04
12#define PRUSS_CFG_GPCFG(x) (0x08 + (x) * 4)
13#define PRUSS_CFG_CGR 0x10
14#define PRUSS_CFG_ISRP 0x14
15#define PRUSS_CFG_ISP 0x18
16#define PRUSS_CFG_IESP 0x1C
17#define PRUSS_CFG_IECP 0x20
18#define PRUSS_CFG_SCRP 0x24
19#define PRUSS_CFG_PMAO 0x28
20#define PRUSS_CFG_MII_RT 0x2C
21#define PRUSS_CFG_IEPCLK 0x30
22#define PRUSS_CFG_SPP 0x34
23#define PRUSS_CFG_PIN_MX 0x40
24
25/* PRUSS_GPCFG register bits */
26#define PRUSS_GPCFG_PRU_GPO_SH_SEL BIT(25)
27
28#define PRUSS_GPCFG_PRU_DIV1_SHIFT 20
29#define PRUSS_GPCFG_PRU_DIV1_MASK GENMASK(24, 20)
30
31#define PRUSS_GPCFG_PRU_DIV0_SHIFT 15
32#define PRUSS_GPCFG_PRU_DIV0_MASK GENMASK(15, 19)
33
34#define PRUSS_GPCFG_PRU_GPO_MODE BIT(14)
35#define PRUSS_GPCFG_PRU_GPO_MODE_DIRECT 0
36#define PRUSS_GPCFG_PRU_GPO_MODE_SERIAL BIT(14)
37
38#define PRUSS_GPCFG_PRU_GPI_SB BIT(13)
39
40#define PRUSS_GPCFG_PRU_GPI_DIV1_SHIFT 8
41#define PRUSS_GPCFG_PRU_GPI_DIV1_MASK GENMASK(12, 8)
42
43#define PRUSS_GPCFG_PRU_GPI_DIV0_SHIFT 3
44#define PRUSS_GPCFG_PRU_GPI_DIV0_MASK GENMASK(7, 3)
45
46#define PRUSS_GPCFG_PRU_GPI_CLK_MODE_POSITIVE 0
47#define PRUSS_GPCFG_PRU_GPI_CLK_MODE_NEGATIVE BIT(2)
48#define PRUSS_GPCFG_PRU_GPI_CLK_MODE BIT(2)
49
50#define PRUSS_GPCFG_PRU_GPI_MODE_MASK GENMASK(1, 0)
51#define PRUSS_GPCFG_PRU_GPI_MODE_SHIFT 0
52
53#define PRUSS_GPCFG_PRU_MUX_SEL_SHIFT 26
54#define PRUSS_GPCFG_PRU_MUX_SEL_MASK GENMASK(29, 26)
55
56/* PRUSS_MII_RT register bits */
57#define PRUSS_MII_RT_EVENT_EN BIT(0)
58
59/* PRUSS_SPP register bits */
60#define PRUSS_SPP_PRU1_PAD_HP_EN BIT(0)
61#define PRUSS_SPP_XFER_SHIFT_EN BIT(1)
62#define PRUSS_SPP_XFR_BYTE_SHIFT_EN BIT(2)
63#define PRUSS_SPP_RTU_XFR_SHIFT_EN BIT(3)
64
65/**
66 * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the
67 * PRUSS_GPCFG0/1 registers
68 *
69 * NOTE: The below defines are the most common values, but there
70 * are some exceptions like on 66AK2G, where the RESERVED and MII2
71 * values are interchanged. Also, this bit-field does not exist on
72 * AM335x SoCs
73 */
74enum pruss_gp_mux_sel {
75 PRUSS_GP_MUX_SEL_GP = 0,
76 PRUSS_GP_MUX_SEL_ENDAT,
77 PRUSS_GP_MUX_SEL_RESERVED,
78 PRUSS_GP_MUX_SEL_SD,
79 PRUSS_GP_MUX_SEL_MII2,
80 PRUSS_GP_MUX_SEL_MAX,
81};
82
83/**
84 * enum pruss_gpi_mode - PRUSS GPI configuration modes, used
85 * to program the PRUSS_GPCFG0/1 registers
86 */
87enum pruss_gpi_mode {
88 PRUSS_GPI_MODE_DIRECT = 0,
89 PRUSS_GPI_MODE_PARALLEL,
90 PRUSS_GPI_MODE_28BIT_SHIFT,
91 PRUSS_GPI_MODE_MII,
92};
93
94/**
95 * enum pruss_pru_id - PRU core identifiers
96 */
97enum pruss_pru_id {
98 PRUSS_PRU0 = 0,
99 PRUSS_PRU1,
100 PRUSS_NUM_PRUS,
101};
102
103/**
104 * enum pru_ctable_idx - Configurable Constant table index identifiers
105 */
106enum pru_ctable_idx {
107 PRU_C24 = 0,
108 PRU_C25,
109 PRU_C26,
110 PRU_C27,
111 PRU_C28,
112 PRU_C29,
113 PRU_C30,
114 PRU_C31,
115};
116
117/**
118 * enum pruss_mem - PRUSS memory range identifiers
119 */
120enum pruss_mem {
121 PRUSS_MEM_DRAM0 = 0,
122 PRUSS_MEM_DRAM1,
123 PRUSS_MEM_SHRD_RAM2,
124 PRUSS_MEM_MAX,
125};
126
127/**
128 * struct pruss_mem_region - PRUSS memory region structure
129 * @va: kernel virtual address of the PRUSS memory region
130 * @pa: physical (bus) address of the PRUSS memory region
131 * @size: size of the PRUSS memory region
132 */
133struct pruss_mem_region {
134 void __iomem *va;
135 phys_addr_t pa;
136 size_t size;
137};
138
139/**
140 * struct pruss - PRUSS parent structure
141 * @dev: pruss device pointer
142 * @cfg: regmap for config region
143 * @mem_regions: data for each of the PRUSS memory regions
144 * @mem_in_use: to indicate if memory resource is in use
145 */
146struct pruss {
147 struct udevice *dev;
148 struct regmap *cfg;
149 struct pruss_mem_region mem_regions[PRUSS_MEM_MAX];
150 struct pruss_mem_region *mem_in_use[PRUSS_MEM_MAX];
151};
152
153int pruss_request_tm_region(struct udevice *dev, phys_addr_t *loc);
154int pruss_request_mem_region(struct udevice *dev, enum pruss_mem mem_id,
155 struct pruss_mem_region *region);
156int pruss_release_mem_region(struct udevice *dev, struct pruss_mem_region *region);
157int pruss_cfg_update(struct udevice *dev, unsigned int reg,
158 unsigned int mask, unsigned int val);
159
160/**
161 * pruss_cfg_gpimode() - set the GPI mode of the PRU
162 * @dev: the pruss device
163 * @pru_id: the rproc instance handle of the PRU
164 * @mode: GPI mode to set
165 *
166 * Sets the GPI mode for a given PRU by programming the
167 * corresponding PRUSS_CFG_GPCFGx register
168 *
169 * Returns 0 on success, or an error code otherwise
170 */
171static inline int pruss_cfg_gpimode(struct udevice *dev, enum pruss_pru_id id,
172 enum pruss_gpi_mode mode)
173{
174 if (id < 0)
175 return -EINVAL;
176
177 return pruss_cfg_update(dev, PRUSS_CFG_GPCFG(id),
178 PRUSS_GPCFG_PRU_GPI_MODE_MASK,
179 mode << PRUSS_GPCFG_PRU_GPI_MODE_SHIFT);
180}
181
182/**
183 * pruss_cfg_miirt_enable() - Enable/disable MII RT Events
184 * @dev: the pruss device
185 * @enable: enable/disable
186 *
187 * Enable/disable the MII RT Events for the PRUSS.
188 */
189static inline int pruss_cfg_miirt_enable(struct udevice *dev, bool enable)
190{
191 u32 set = enable ? PRUSS_MII_RT_EVENT_EN : 0;
192
193 return pruss_cfg_update(dev, PRUSS_CFG_MII_RT,
194 PRUSS_MII_RT_EVENT_EN, set);
195}
196
197/**
198 * pruss_cfg_xfr_enable() - Enable/disable XIN XOUT shift functionality
199 * @dev: the pruss device
200 * @enable: enable/disable
201 */
202static inline int pruss_cfg_xfr_enable(struct udevice *dev, bool enable)
203{
204 u32 set = enable ? PRUSS_SPP_XFER_SHIFT_EN : 0;
205
206 return pruss_cfg_update(dev, PRUSS_CFG_SPP,
207 PRUSS_SPP_XFER_SHIFT_EN, set);
208}
209
210/**
211 * pruss_cfg_set_gpmux() - set the GPMUX value for a PRU device
212 * @pruss: pruss device
213 * @pru_id: PRU identifier (0-1)
214 * @mux: new mux value for PRU
215 */
216static inline int pruss_cfg_set_gpmux(struct udevice *dev,
217 enum pruss_pru_id id, u8 mux)
218{
219 if (mux >= PRUSS_GP_MUX_SEL_MAX)
220 return -EINVAL;
221
222 return pruss_cfg_update(dev, PRUSS_CFG_GPCFG(id),
223 PRUSS_GPCFG_PRU_MUX_SEL_MASK,
224 (u32)mux << PRUSS_GPCFG_PRU_MUX_SEL_SHIFT);
225}
226
227#endif /* __TI_PRUSS_H */