| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * PRU-ICSS Subsystem user interfaces |
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| 4 | * |
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| 5 | * Copyright (C) 2015-2023 Texas Instruments Incorporated - http://www.ti.com |
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| 6 | * MD Danish Anwar <danishanwar@ti.com> |
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| 7 | */ |
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| 8 | |
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| 9 | #ifndef _SOC_TI_PRUSS_H_ |
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| 10 | #define _SOC_TI_PRUSS_H_ |
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| 11 | |
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| 12 | #include <linux/bits.h> |
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| 13 | #include <linux/regmap.h> |
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| 14 | |
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| 15 | /* |
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| 16 | * PRU_ICSS_CFG registers |
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| 17 | * SYSCFG, ISRP, ISP, IESP, IECP, SCRP applicable on AMxxxx devices only |
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| 18 | */ |
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| 19 | #define PRUSS_CFG_REVID 0x00 |
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| 20 | #define PRUSS_CFG_SYSCFG 0x04 |
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| 21 | #define PRUSS_CFG_GPCFG(x) (0x08 + (x) * 4) |
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| 22 | #define PRUSS_CFG_CGR 0x10 |
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| 23 | #define PRUSS_CFG_ISRP 0x14 |
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| 24 | #define PRUSS_CFG_ISP 0x18 |
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| 25 | #define PRUSS_CFG_IESP 0x1C |
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| 26 | #define PRUSS_CFG_IECP 0x20 |
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| 27 | #define PRUSS_CFG_SCRP 0x24 |
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| 28 | #define PRUSS_CFG_PMAO 0x28 |
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| 29 | #define PRUSS_CFG_MII_RT 0x2C |
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| 30 | #define PRUSS_CFG_IEPCLK 0x30 |
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| 31 | #define PRUSS_CFG_SPP 0x34 |
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| 32 | #define PRUSS_CFG_PIN_MX 0x40 |
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| 33 | |
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| 34 | /* PRUSS_GPCFG register bits */ |
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| 35 | #define PRUSS_GPCFG_PRU_GPI_MODE_MASK GENMASK(1, 0) |
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| 36 | #define PRUSS_GPCFG_PRU_GPI_MODE_SHIFT 0 |
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| 37 | |
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| 38 | #define PRUSS_GPCFG_PRU_MUX_SEL_SHIFT 26 |
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| 39 | #define PRUSS_GPCFG_PRU_MUX_SEL_MASK GENMASK(29, 26) |
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| 40 | |
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| 41 | /* PRUSS_MII_RT register bits */ |
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| 42 | #define PRUSS_MII_RT_EVENT_EN BIT(0) |
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| 43 | |
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| 44 | /* PRUSS_SPP register bits */ |
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| 45 | #define PRUSS_SPP_XFER_SHIFT_EN BIT(1) |
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| 46 | #define PRUSS_SPP_PRU1_PAD_HP_EN BIT(0) |
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| 47 | #define PRUSS_SPP_RTU_XFR_SHIFT_EN BIT(3) |
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| 48 | |
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| 49 | /** |
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| 50 | * pruss_cfg_read() - read a PRUSS CFG sub-module register |
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| 51 | * @pruss: the pruss instance handle |
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| 52 | * @reg: register offset within the CFG sub-module |
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| 53 | * @val: pointer to return the value in |
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| 54 | * |
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| 55 | * Reads a given register within the PRUSS CFG sub-module and |
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| 56 | * returns it through the passed-in @val pointer |
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| 57 | * |
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| 58 | * Return: 0 on success, or an error code otherwise |
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| 59 | */ |
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| 60 | static int pruss_cfg_read(struct pruss *pruss, unsigned int reg, unsigned int *val) |
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| 61 | { |
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| 62 | if (IS_ERR_OR_NULL(ptr: pruss)) |
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| 63 | return -EINVAL; |
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| 64 | |
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| 65 | return regmap_read(map: pruss->cfg_regmap, reg, val); |
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| 66 | } |
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| 67 | |
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| 68 | /** |
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| 69 | * pruss_cfg_update() - configure a PRUSS CFG sub-module register |
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| 70 | * @pruss: the pruss instance handle |
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| 71 | * @reg: register offset within the CFG sub-module |
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| 72 | * @mask: bit mask to use for programming the @val |
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| 73 | * @val: value to write |
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| 74 | * |
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| 75 | * Programs a given register within the PRUSS CFG sub-module |
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| 76 | * |
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| 77 | * Return: 0 on success, or an error code otherwise |
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| 78 | */ |
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| 79 | static int pruss_cfg_update(struct pruss *pruss, unsigned int reg, |
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| 80 | unsigned int mask, unsigned int val) |
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| 81 | { |
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| 82 | if (IS_ERR_OR_NULL(ptr: pruss)) |
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| 83 | return -EINVAL; |
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| 84 | |
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| 85 | return regmap_update_bits(map: pruss->cfg_regmap, reg, mask, val); |
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| 86 | } |
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| 87 | |
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| 88 | #endif /* _SOC_TI_PRUSS_H_ */ |
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| 89 | |
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