1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Copyright (C) 2018 Arm Limited. All rights reserved.
  4 *
  5 * Author: Suzuki K Poulose <suzuki.poulose@arm.com>
  6 */
  7
  8#ifndef _CORESIGHT_CATU_H
  9#define _CORESIGHT_CATU_H
 10
 11#include "coresight-priv.h"
 12
 13/* Register offset from base */
 14#define CATU_CONTROL		0x000
 15#define CATU_MODE		0x004
 16#define CATU_AXICTRL		0x008
 17#define CATU_IRQEN		0x00c
 18#define CATU_SLADDRLO		0x020
 19#define CATU_SLADDRHI		0x024
 20#define CATU_INADDRLO		0x028
 21#define CATU_INADDRHI		0x02c
 22#define CATU_STATUS		0x100
 23#define CATU_DEVARCH		0xfbc
 24
 25#define CATU_CONTROL_ENABLE	0
 26
 27#define CATU_MODE_PASS_THROUGH	0U
 28#define CATU_MODE_TRANSLATE	1U
 29
 30#define CATU_AXICTRL_ARCACHE_SHIFT	4
 31#define CATU_AXICTRL_ARCACHE_MASK	0xf
 32#define CATU_AXICTRL_ARPROT_MASK	0x3
 33#define CATU_AXICTRL_ARCACHE(arcache)		\
 34	(((arcache) & CATU_AXICTRL_ARCACHE_MASK) << CATU_AXICTRL_ARCACHE_SHIFT)
 35
 36#define CATU_AXICTRL_VAL(arcache, arprot)	\
 37	(CATU_AXICTRL_ARCACHE(arcache) | ((arprot) & CATU_AXICTRL_ARPROT_MASK))
 38
 39#define AXI3_AxCACHE_WB_READ_ALLOC	0x7
 40/*
 41 * AXI - ARPROT bits:
 42 * See AMBA AXI & ACE Protocol specification (ARM IHI 0022E)
 43 * sectionA4.7 Access Permissions.
 44 *
 45 * Bit 0: 0 - Unprivileged access, 1 - Privileged access
 46 * Bit 1: 0 - Secure access, 1 - Non-secure access.
 47 * Bit 2: 0 - Data access, 1 - instruction access.
 48 *
 49 * CATU AXICTRL:ARPROT[2] is res0 as we always access data.
 50 */
 51#define CATU_OS_ARPROT			0x2
 52
 53#define CATU_OS_AXICTRL		\
 54	CATU_AXICTRL_VAL(AXI3_AxCACHE_WB_READ_ALLOC, CATU_OS_ARPROT)
 55
 56#define CATU_STATUS_READY	8
 57#define CATU_STATUS_ADRERR	0
 58#define CATU_STATUS_AXIERR	4
 59
 60#define CATU_IRQEN_ON		0x1
 61#define CATU_IRQEN_OFF		0x0
 62
 63struct catu_drvdata {
 64	void __iomem *base;
 65	struct coresight_device *csdev;
 66	int irq;
 67};
 68
 69#define CATU_REG32(name, offset)					\
 70static inline u32							\
 71catu_read_##name(struct catu_drvdata *drvdata)				\
 72{									\
 73	return csdev_access_relaxed_read32(&drvdata->csdev->access, offset); \
 74}									\
 75static inline void							\
 76catu_write_##name(struct catu_drvdata *drvdata, u32 val)		\
 77{									\
 78	csdev_access_relaxed_write32(&drvdata->csdev->access, val, offset); \
 79}
 80
 81#define CATU_REG_PAIR(name, lo_off, hi_off)				\
 82static inline u64							\
 83catu_read_##name(struct catu_drvdata *drvdata)				\
 84{									\
 85	return csdev_access_relaxed_read_pair(&drvdata->csdev->access, lo_off, hi_off); \
 86}									\
 87static inline void							\
 88catu_write_##name(struct catu_drvdata *drvdata, u64 val)		\
 89{									\
 90	csdev_access_relaxed_write_pair(&drvdata->csdev->access, val, lo_off, hi_off); \
 91}
 92
 93CATU_REG32(control, CATU_CONTROL);
 94CATU_REG32(mode, CATU_MODE);
 95CATU_REG32(irqen, CATU_IRQEN);
 96CATU_REG32(axictrl, CATU_AXICTRL);
 97CATU_REG_PAIR(sladdr, CATU_SLADDRLO, CATU_SLADDRHI)
 98CATU_REG_PAIR(inaddr, CATU_INADDRLO, CATU_INADDRHI)
 99
100static inline bool coresight_is_catu_device(struct coresight_device *csdev)
101{
102	if (!IS_ENABLED(CONFIG_CORESIGHT_CATU))
103		return false;
104	if (csdev->type != CORESIGHT_DEV_TYPE_HELPER)
105		return false;
106	if (csdev->subtype.helper_subtype != CORESIGHT_DEV_SUBTYPE_HELPER_CATU)
107		return false;
108	return true;
109}
110
111#endif