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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * PRU-ICSS Subsystem user interfaces
4 *
5 * Copyright (C) 2015-2023 Texas Instruments Incorporated - http://www.ti.com
6 * MD Danish Anwar <danishanwar@ti.com>
7 */
8
9#ifndef _SOC_TI_PRUSS_H_
10#define _SOC_TI_PRUSS_H_
11
12#include <linux/bits.h>
13#include <linux/regmap.h>
14
15/*
16 * PRU_ICSS_CFG registers
17 * SYSCFG, ISRP, ISP, IESP, IECP, SCRP applicable on AMxxxx devices only
18 */
19#define PRUSS_CFG_REVID 0x00
20#define PRUSS_CFG_SYSCFG 0x04
21#define PRUSS_CFG_GPCFG(x) (0x08 + (x) * 4)
22#define PRUSS_CFG_CGR 0x10
23#define PRUSS_CFG_ISRP 0x14
24#define PRUSS_CFG_ISP 0x18
25#define PRUSS_CFG_IESP 0x1C
26#define PRUSS_CFG_IECP 0x20
27#define PRUSS_CFG_SCRP 0x24
28#define PRUSS_CFG_PMAO 0x28
29#define PRUSS_CFG_MII_RT 0x2C
30#define PRUSS_CFG_IEPCLK 0x30
31#define PRUSS_CFG_SPP 0x34
32#define PRUSS_CFG_PIN_MX 0x40
33
34/* PRUSS_GPCFG register bits */
35#define PRUSS_GPCFG_PRU_GPI_MODE_MASK GENMASK(1, 0)
36#define PRUSS_GPCFG_PRU_GPI_MODE_SHIFT 0
37
38#define PRUSS_GPCFG_PRU_MUX_SEL_SHIFT 26
39#define PRUSS_GPCFG_PRU_MUX_SEL_MASK GENMASK(29, 26)
40
41/* PRUSS_MII_RT register bits */
42#define PRUSS_MII_RT_EVENT_EN BIT(0)
43
44/* PRUSS_SPP register bits */
45#define PRUSS_SPP_XFER_SHIFT_EN BIT(1)
46#define PRUSS_SPP_PRU1_PAD_HP_EN BIT(0)
47#define PRUSS_SPP_RTU_XFR_SHIFT_EN BIT(3)
48
49/**
50 * pruss_cfg_read() - read a PRUSS CFG sub-module register
51 * @pruss: the pruss instance handle
52 * @reg: register offset within the CFG sub-module
53 * @val: pointer to return the value in
54 *
55 * Reads a given register within the PRUSS CFG sub-module and
56 * returns it through the passed-in @val pointer
57 *
58 * Return: 0 on success, or an error code otherwise
59 */
60static int pruss_cfg_read(struct pruss *pruss, unsigned int reg, unsigned int *val)
61{
62 if (IS_ERR_OR_NULL(pruss))
63 return -EINVAL;
64
65 return regmap_read(pruss->cfg_regmap, reg, val);
66}
67
68/**
69 * pruss_cfg_update() - configure a PRUSS CFG sub-module register
70 * @pruss: the pruss instance handle
71 * @reg: register offset within the CFG sub-module
72 * @mask: bit mask to use for programming the @val
73 * @val: value to write
74 *
75 * Programs a given register within the PRUSS CFG sub-module
76 *
77 * Return: 0 on success, or an error code otherwise
78 */
79static int pruss_cfg_update(struct pruss *pruss, unsigned int reg,
80 unsigned int mask, unsigned int val)
81{
82 if (IS_ERR_OR_NULL(pruss))
83 return -EINVAL;
84
85 return regmap_update_bits(pruss->cfg_regmap, reg, mask, val);
86}
87
88#endif /* _SOC_TI_PRUSS_H_ */