1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *  cb710/debug.c
4 *
5 *  Copyright by Micha�� Miros��aw, 2008-2009
6 */
7#include <linux/cb710.h>
8#include <linux/kernel.h>
9#include <linux/module.h>
10
11#define CB710_REG_COUNT		0x80
12
13static const u16 allow[CB710_REG_COUNT/16] = {
14	0xFFF0, 0xFFFF, 0xFFFF, 0xFFFF,
15	0xFFF0, 0xFFFF, 0xFFFF, 0xFFFF,
16};
17static const char *const prefix[ARRAY_SIZE(allow)] = {
18	"MMC", "MMC", "MMC", "MMC",
19	"MS?", "MS?", "SM?", "SM?"
20};
21
22static inline int allow_reg_read(unsigned block, unsigned offset, unsigned bits)
23{
24	unsigned mask = (1 << bits/8) - 1;
25	offset *= bits/8;
26	return ((allow[block] >> offset) & mask) == mask;
27}
28
29#define CB710_READ_REGS_TEMPLATE(t)					\
30static void cb710_read_regs_##t(void __iomem *iobase,			\
31	u##t *reg, unsigned select)					\
32{									\
33	unsigned i, j;							\
34									\
35	for (i = 0; i < ARRAY_SIZE(allow); ++i, reg += 16/(t/8)) {	\
36		if (!(select & (1 << i)))					\
37			continue;					\
38									\
39		for (j = 0; j < 0x10/(t/8); ++j) {			\
40			if (!allow_reg_read(i, j, t))			\
41				continue;				\
42			reg[j] = ioread##t(iobase			\
43				+ (i << 4) + (j * (t/8)));		\
44		}							\
45	}								\
46}
47
48static const char cb710_regf_8[] = "%02X";
49static const char cb710_regf_16[] = "%04X";
50static const char cb710_regf_32[] = "%08X";
51static const char cb710_xes[] = "xxxxxxxx";
52
53#define CB710_DUMP_REGS_TEMPLATE(t)					\
54static void cb710_dump_regs_##t(struct device *dev,			\
55	const u##t *reg, unsigned select)				\
56{									\
57	const char *const xp = &cb710_xes[8 - t/4];			\
58	const char *const format = cb710_regf_##t;			\
59									\
60	char msg[100], *p;						\
61	unsigned i, j;							\
62									\
63	for (i = 0; i < ARRAY_SIZE(allow); ++i, reg += 16/(t/8)) {	\
64		if (!(select & (1 << i)))				\
65			continue;					\
66		p = msg;						\
67		for (j = 0; j < 0x10/(t/8); ++j) {			\
68			*p++ = ' ';					\
69			if (j == 8/(t/8))				\
70				*p++ = ' ';				\
71			if (allow_reg_read(i, j, t))			\
72				p += sprintf(p, format, reg[j]);	\
73			else						\
74				p += sprintf(p, "%s", xp);		\
75		}							\
76		dev_dbg(dev, "%s 0x%02X %s\n", prefix[i], i << 4, msg);	\
77	}								\
78}
79
80#define CB710_READ_AND_DUMP_REGS_TEMPLATE(t)				\
81static void cb710_read_and_dump_regs_##t(struct cb710_chip *chip,	\
82	unsigned select)						\
83{									\
84	u##t regs[CB710_REG_COUNT/sizeof(u##t)];			\
85									\
86	memset(&regs, 0, sizeof(regs));					\
87	cb710_read_regs_##t(chip->iobase, regs, select);		\
88	cb710_dump_regs_##t(cb710_chip_dev(chip), regs, select);	\
89}
90
91#define CB710_REG_ACCESS_TEMPLATES(t)		\
92  CB710_READ_REGS_TEMPLATE(t)			\
93  CB710_DUMP_REGS_TEMPLATE(t)			\
94  CB710_READ_AND_DUMP_REGS_TEMPLATE(t)
95
96CB710_REG_ACCESS_TEMPLATES(8)
97CB710_REG_ACCESS_TEMPLATES(16)
98CB710_REG_ACCESS_TEMPLATES(32)
99
100void cb710_dump_regs(struct cb710_chip *chip, unsigned select)
101{
102	if (!(select & CB710_DUMP_REGS_MASK))
103		select = CB710_DUMP_REGS_ALL;
104	if (!(select & CB710_DUMP_ACCESS_MASK))
105		select |= CB710_DUMP_ACCESS_8;
106
107	if (select & CB710_DUMP_ACCESS_32)
108		cb710_read_and_dump_regs_32(chip, select);
109	if (select & CB710_DUMP_ACCESS_16)
110		cb710_read_and_dump_regs_16(chip, select);
111	if (select & CB710_DUMP_ACCESS_8)
112		cb710_read_and_dump_regs_8(chip, select);
113}
114EXPORT_SYMBOL_GPL(cb710_dump_regs);
115
116