1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright 2019-2020 NXP
4 */
5
6#include <linux/debugfs.h>
7#include <linux/device.h>
8#include <linux/io.h>
9#include <linux/kernel.h>
10#include <linux/pm_runtime.h>
11#include <linux/seq_file.h>
12#include <linux/types.h>
13
14#include "imx8-isi-core.h"
15#include "imx8-isi-regs.h"
16
17static inline u32 mxc_isi_read(struct mxc_isi_pipe *pipe, u32 reg)
18{
19	return readl(pipe->regs + reg);
20}
21
22static int mxc_isi_debug_dump_regs_show(struct seq_file *m, void *p)
23{
24#define MXC_ISI_DEBUG_REG(name)		{ name, #name }
25	static const struct {
26		u32 offset;
27		const char * const name;
28	} registers[] = {
29		MXC_ISI_DEBUG_REG(CHNL_CTRL),
30		MXC_ISI_DEBUG_REG(CHNL_IMG_CTRL),
31		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF_CTRL),
32		MXC_ISI_DEBUG_REG(CHNL_IMG_CFG),
33		MXC_ISI_DEBUG_REG(CHNL_IER),
34		MXC_ISI_DEBUG_REG(CHNL_STS),
35		MXC_ISI_DEBUG_REG(CHNL_SCALE_FACTOR),
36		MXC_ISI_DEBUG_REG(CHNL_SCALE_OFFSET),
37		MXC_ISI_DEBUG_REG(CHNL_CROP_ULC),
38		MXC_ISI_DEBUG_REG(CHNL_CROP_LRC),
39		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF0),
40		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF1),
41		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF2),
42		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF3),
43		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF4),
44		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF5),
45		MXC_ISI_DEBUG_REG(CHNL_ROI_0_ALPHA),
46		MXC_ISI_DEBUG_REG(CHNL_ROI_0_ULC),
47		MXC_ISI_DEBUG_REG(CHNL_ROI_0_LRC),
48		MXC_ISI_DEBUG_REG(CHNL_ROI_1_ALPHA),
49		MXC_ISI_DEBUG_REG(CHNL_ROI_1_ULC),
50		MXC_ISI_DEBUG_REG(CHNL_ROI_1_LRC),
51		MXC_ISI_DEBUG_REG(CHNL_ROI_2_ALPHA),
52		MXC_ISI_DEBUG_REG(CHNL_ROI_2_ULC),
53		MXC_ISI_DEBUG_REG(CHNL_ROI_2_LRC),
54		MXC_ISI_DEBUG_REG(CHNL_ROI_3_ALPHA),
55		MXC_ISI_DEBUG_REG(CHNL_ROI_3_ULC),
56		MXC_ISI_DEBUG_REG(CHNL_ROI_3_LRC),
57		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF1_ADDR_Y),
58		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF1_ADDR_U),
59		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF1_ADDR_V),
60		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF_PITCH),
61		MXC_ISI_DEBUG_REG(CHNL_IN_BUF_ADDR),
62		MXC_ISI_DEBUG_REG(CHNL_IN_BUF_PITCH),
63		MXC_ISI_DEBUG_REG(CHNL_MEM_RD_CTRL),
64		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF2_ADDR_Y),
65		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF2_ADDR_U),
66		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF2_ADDR_V),
67		MXC_ISI_DEBUG_REG(CHNL_SCL_IMG_CFG),
68		MXC_ISI_DEBUG_REG(CHNL_FLOW_CTRL),
69	};
70
71	struct mxc_isi_pipe *pipe = m->private;
72	unsigned int i;
73
74	if (!pm_runtime_get_if_in_use(pipe->isi->dev))
75		return 0;
76
77	seq_printf(m, "--- ISI pipe %u registers ---\n", pipe->id);
78
79	for (i = 0; i < ARRAY_SIZE(registers); ++i)
80		seq_printf(m, "%20s[0x%02x]: 0x%08x\n",
81			   registers[i].name, registers[i].offset,
82			   mxc_isi_read(pipe, registers[i].offset));
83
84	pm_runtime_put(pipe->isi->dev);
85
86	return 0;
87}
88DEFINE_SHOW_ATTRIBUTE(mxc_isi_debug_dump_regs);
89
90void mxc_isi_debug_init(struct mxc_isi_dev *isi)
91{
92	unsigned int i;
93
94	isi->debugfs_root = debugfs_create_dir(dev_name(isi->dev), NULL);
95
96	for (i = 0; i < isi->pdata->num_channels; ++i) {
97		struct mxc_isi_pipe *pipe = &isi->pipes[i];
98		char name[8];
99
100		sprintf(name, "pipe%u", pipe->id);
101		debugfs_create_file(name, 0444, isi->debugfs_root, pipe,
102				    &mxc_isi_debug_dump_regs_fops);
103	}
104}
105
106void mxc_isi_debug_cleanup(struct mxc_isi_dev *isi)
107{
108	debugfs_remove_recursive(isi->debugfs_root);
109}
110