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88ac86f2 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
bf03473d PLB |
2 | // Copyright(c) 2017-2019 Intel Corporation. |
3 | ||
4 | #include <linux/device.h> | |
5 | #include <linux/debugfs.h> | |
6 | #include <linux/mod_devicetable.h> | |
7 | #include <linux/slab.h> | |
8 | #include <linux/soundwire/sdw.h> | |
9 | #include <linux/soundwire/sdw_registers.h> | |
10 | #include "bus.h" | |
11 | ||
12 | static struct dentry *sdw_debugfs_root; | |
13 | ||
14 | void sdw_bus_debugfs_init(struct sdw_bus *bus) | |
15 | { | |
16 | char name[16]; | |
17 | ||
18 | if (!sdw_debugfs_root) | |
19 | return; | |
20 | ||
21 | /* create the debugfs master-N */ | |
22 | snprintf(name, sizeof(name), "master-%d", bus->link_id); | |
23 | bus->debugfs = debugfs_create_dir(name, sdw_debugfs_root); | |
24 | } | |
25 | ||
26 | void sdw_bus_debugfs_exit(struct sdw_bus *bus) | |
27 | { | |
28 | debugfs_remove_recursive(bus->debugfs); | |
29 | } | |
30 | ||
31 | #define RD_BUF (3 * PAGE_SIZE) | |
32 | ||
33 | static ssize_t sdw_sprintf(struct sdw_slave *slave, | |
34 | char *buf, size_t pos, unsigned int reg) | |
35 | { | |
36 | int value; | |
37 | ||
38 | value = sdw_read(slave, reg); | |
39 | ||
40 | if (value < 0) | |
41 | return scnprintf(buf + pos, RD_BUF - pos, "%3x\tXX\n", reg); | |
42 | else | |
43 | return scnprintf(buf + pos, RD_BUF - pos, | |
44 | "%3x\t%2x\n", reg, value); | |
45 | } | |
46 | ||
47 | static int sdw_slave_reg_show(struct seq_file *s_file, void *data) | |
48 | { | |
49 | struct sdw_slave *slave = s_file->private; | |
50 | char *buf; | |
51 | ssize_t ret; | |
52 | int i, j; | |
53 | ||
54 | buf = kzalloc(RD_BUF, GFP_KERNEL); | |
55 | if (!buf) | |
56 | return -ENOMEM; | |
57 | ||
58 | ret = scnprintf(buf, RD_BUF, "Register Value\n"); | |
59 | ||
60 | /* DP0 non-banked registers */ | |
61 | ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP0\n"); | |
62 | for (i = SDW_DP0_INT; i <= SDW_DP0_PREPARECTRL; i++) | |
63 | ret += sdw_sprintf(slave, buf, ret, i); | |
64 | ||
65 | /* DP0 Bank 0 registers */ | |
66 | ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n"); | |
67 | ret += sdw_sprintf(slave, buf, ret, SDW_DP0_CHANNELEN); | |
68 | for (i = SDW_DP0_SAMPLECTRL1; i <= SDW_DP0_LANECTRL; i++) | |
69 | ret += sdw_sprintf(slave, buf, ret, i); | |
70 | ||
71 | /* DP0 Bank 1 registers */ | |
72 | ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n"); | |
73 | ret += sdw_sprintf(slave, buf, ret, | |
74 | SDW_DP0_CHANNELEN + SDW_BANK1_OFFSET); | |
75 | for (i = SDW_DP0_SAMPLECTRL1 + SDW_BANK1_OFFSET; | |
76 | i <= SDW_DP0_LANECTRL + SDW_BANK1_OFFSET; i++) | |
77 | ret += sdw_sprintf(slave, buf, ret, i); | |
78 | ||
79 | /* SCP registers */ | |
80 | ret += scnprintf(buf + ret, RD_BUF - ret, "\nSCP\n"); | |
81 | for (i = SDW_SCP_INT1; i <= SDW_SCP_BANKDELAY; i++) | |
82 | ret += sdw_sprintf(slave, buf, ret, i); | |
83 | for (i = SDW_SCP_DEVID_0; i <= SDW_SCP_DEVID_5; i++) | |
84 | ret += sdw_sprintf(slave, buf, ret, i); | |
85 | ||
86 | /* | |
87 | * SCP Bank 0/1 registers are read-only and cannot be | |
88 | * retrieved from the Slave. The Master typically keeps track | |
89 | * of the current frame size so the information can be found | |
90 | * in other places | |
91 | */ | |
92 | ||
93 | /* DP1..14 registers */ | |
94 | for (i = 1; SDW_VALID_PORT_RANGE(i); i++) { | |
95 | ||
96 | /* DPi registers */ | |
97 | ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP%d\n", i); | |
98 | for (j = SDW_DPN_INT(i); j <= SDW_DPN_PREPARECTRL(i); j++) | |
99 | ret += sdw_sprintf(slave, buf, ret, j); | |
100 | ||
101 | /* DPi Bank0 registers */ | |
102 | ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n"); | |
103 | for (j = SDW_DPN_CHANNELEN_B0(i); | |
104 | j <= SDW_DPN_LANECTRL_B0(i); j++) | |
105 | ret += sdw_sprintf(slave, buf, ret, j); | |
106 | ||
107 | /* DPi Bank1 registers */ | |
108 | ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n"); | |
109 | for (j = SDW_DPN_CHANNELEN_B1(i); | |
110 | j <= SDW_DPN_LANECTRL_B1(i); j++) | |
111 | ret += sdw_sprintf(slave, buf, ret, j); | |
112 | } | |
113 | ||
114 | seq_printf(s_file, "%s", buf); | |
115 | kfree(buf); | |
116 | ||
117 | return 0; | |
118 | } | |
119 | DEFINE_SHOW_ATTRIBUTE(sdw_slave_reg); | |
120 | ||
121 | void sdw_slave_debugfs_init(struct sdw_slave *slave) | |
122 | { | |
123 | struct dentry *master; | |
124 | struct dentry *d; | |
125 | char name[32]; | |
126 | ||
127 | master = slave->bus->debugfs; | |
128 | ||
129 | /* create the debugfs slave-name */ | |
130 | snprintf(name, sizeof(name), "%s", dev_name(&slave->dev)); | |
131 | d = debugfs_create_dir(name, master); | |
132 | ||
133 | debugfs_create_file("registers", 0400, d, slave, &sdw_slave_reg_fops); | |
134 | ||
135 | slave->debugfs = d; | |
136 | } | |
137 | ||
138 | void sdw_slave_debugfs_exit(struct sdw_slave *slave) | |
139 | { | |
140 | debugfs_remove_recursive(slave->debugfs); | |
141 | } | |
142 | ||
143 | void sdw_debugfs_init(void) | |
144 | { | |
145 | sdw_debugfs_root = debugfs_create_dir("soundwire", NULL); | |
146 | } | |
147 | ||
148 | void sdw_debugfs_exit(void) | |
149 | { | |
150 | debugfs_remove_recursive(sdw_debugfs_root); | |
151 | } |