Commit | Line | Data |
---|---|---|
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> | |
b275bf45 | 7 | #include <linux/pm_runtime.h> |
bf03473d PLB |
8 | #include <linux/slab.h> |
9 | #include <linux/soundwire/sdw.h> | |
10 | #include <linux/soundwire/sdw_registers.h> | |
11 | #include "bus.h" | |
12 | ||
13 | static struct dentry *sdw_debugfs_root; | |
14 | ||
15 | void sdw_bus_debugfs_init(struct sdw_bus *bus) | |
16 | { | |
17 | char name[16]; | |
18 | ||
19 | if (!sdw_debugfs_root) | |
20 | return; | |
21 | ||
22 | /* create the debugfs master-N */ | |
75eac387 | 23 | snprintf(name, sizeof(name), "master-%d-%d", bus->id, bus->link_id); |
bf03473d PLB |
24 | bus->debugfs = debugfs_create_dir(name, sdw_debugfs_root); |
25 | } | |
26 | ||
27 | void sdw_bus_debugfs_exit(struct sdw_bus *bus) | |
28 | { | |
29 | debugfs_remove_recursive(bus->debugfs); | |
30 | } | |
31 | ||
32 | #define RD_BUF (3 * PAGE_SIZE) | |
33 | ||
34 | static ssize_t sdw_sprintf(struct sdw_slave *slave, | |
35 | char *buf, size_t pos, unsigned int reg) | |
36 | { | |
37 | int value; | |
38 | ||
b275bf45 | 39 | value = sdw_read_no_pm(slave, reg); |
bf03473d PLB |
40 | |
41 | if (value < 0) | |
42 | return scnprintf(buf + pos, RD_BUF - pos, "%3x\tXX\n", reg); | |
43 | else | |
44 | return scnprintf(buf + pos, RD_BUF - pos, | |
45 | "%3x\t%2x\n", reg, value); | |
46 | } | |
47 | ||
48 | static int sdw_slave_reg_show(struct seq_file *s_file, void *data) | |
49 | { | |
50 | struct sdw_slave *slave = s_file->private; | |
51 | char *buf; | |
52 | ssize_t ret; | |
53 | int i, j; | |
54 | ||
55 | buf = kzalloc(RD_BUF, GFP_KERNEL); | |
56 | if (!buf) | |
57 | return -ENOMEM; | |
58 | ||
b275bf45 CK |
59 | ret = pm_runtime_resume_and_get(&slave->dev); |
60 | if (ret < 0 && ret != -EACCES) { | |
61 | kfree(buf); | |
62 | return ret; | |
63 | } | |
64 | ||
bf03473d PLB |
65 | ret = scnprintf(buf, RD_BUF, "Register Value\n"); |
66 | ||
67 | /* DP0 non-banked registers */ | |
68 | ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP0\n"); | |
69 | for (i = SDW_DP0_INT; i <= SDW_DP0_PREPARECTRL; i++) | |
70 | ret += sdw_sprintf(slave, buf, ret, i); | |
71 | ||
72 | /* DP0 Bank 0 registers */ | |
73 | ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n"); | |
74 | ret += sdw_sprintf(slave, buf, ret, SDW_DP0_CHANNELEN); | |
75 | for (i = SDW_DP0_SAMPLECTRL1; i <= SDW_DP0_LANECTRL; i++) | |
76 | ret += sdw_sprintf(slave, buf, ret, i); | |
77 | ||
78 | /* DP0 Bank 1 registers */ | |
79 | ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n"); | |
80 | ret += sdw_sprintf(slave, buf, ret, | |
81 | SDW_DP0_CHANNELEN + SDW_BANK1_OFFSET); | |
82 | for (i = SDW_DP0_SAMPLECTRL1 + SDW_BANK1_OFFSET; | |
83 | i <= SDW_DP0_LANECTRL + SDW_BANK1_OFFSET; i++) | |
84 | ret += sdw_sprintf(slave, buf, ret, i); | |
85 | ||
86 | /* SCP registers */ | |
87 | ret += scnprintf(buf + ret, RD_BUF - ret, "\nSCP\n"); | |
88 | for (i = SDW_SCP_INT1; i <= SDW_SCP_BANKDELAY; i++) | |
89 | ret += sdw_sprintf(slave, buf, ret, i); | |
90 | for (i = SDW_SCP_DEVID_0; i <= SDW_SCP_DEVID_5; i++) | |
91 | ret += sdw_sprintf(slave, buf, ret, i); | |
92 | ||
93 | /* | |
94 | * SCP Bank 0/1 registers are read-only and cannot be | |
95 | * retrieved from the Slave. The Master typically keeps track | |
96 | * of the current frame size so the information can be found | |
97 | * in other places | |
98 | */ | |
99 | ||
100 | /* DP1..14 registers */ | |
101 | for (i = 1; SDW_VALID_PORT_RANGE(i); i++) { | |
102 | ||
103 | /* DPi registers */ | |
104 | ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP%d\n", i); | |
105 | for (j = SDW_DPN_INT(i); j <= SDW_DPN_PREPARECTRL(i); j++) | |
106 | ret += sdw_sprintf(slave, buf, ret, j); | |
107 | ||
108 | /* DPi Bank0 registers */ | |
109 | ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n"); | |
110 | for (j = SDW_DPN_CHANNELEN_B0(i); | |
111 | j <= SDW_DPN_LANECTRL_B0(i); j++) | |
112 | ret += sdw_sprintf(slave, buf, ret, j); | |
113 | ||
114 | /* DPi Bank1 registers */ | |
115 | ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n"); | |
116 | for (j = SDW_DPN_CHANNELEN_B1(i); | |
117 | j <= SDW_DPN_LANECTRL_B1(i); j++) | |
118 | ret += sdw_sprintf(slave, buf, ret, j); | |
119 | } | |
120 | ||
121 | seq_printf(s_file, "%s", buf); | |
b275bf45 CK |
122 | |
123 | pm_runtime_mark_last_busy(&slave->dev); | |
124 | pm_runtime_put(&slave->dev); | |
125 | ||
bf03473d PLB |
126 | kfree(buf); |
127 | ||
128 | return 0; | |
129 | } | |
130 | DEFINE_SHOW_ATTRIBUTE(sdw_slave_reg); | |
131 | ||
132 | void sdw_slave_debugfs_init(struct sdw_slave *slave) | |
133 | { | |
134 | struct dentry *master; | |
135 | struct dentry *d; | |
136 | char name[32]; | |
137 | ||
138 | master = slave->bus->debugfs; | |
139 | ||
140 | /* create the debugfs slave-name */ | |
141 | snprintf(name, sizeof(name), "%s", dev_name(&slave->dev)); | |
142 | d = debugfs_create_dir(name, master); | |
143 | ||
144 | debugfs_create_file("registers", 0400, d, slave, &sdw_slave_reg_fops); | |
145 | ||
146 | slave->debugfs = d; | |
147 | } | |
148 | ||
149 | void sdw_slave_debugfs_exit(struct sdw_slave *slave) | |
150 | { | |
151 | debugfs_remove_recursive(slave->debugfs); | |
152 | } | |
153 | ||
154 | void sdw_debugfs_init(void) | |
155 | { | |
156 | sdw_debugfs_root = debugfs_create_dir("soundwire", NULL); | |
157 | } | |
158 | ||
159 | void sdw_debugfs_exit(void) | |
160 | { | |
161 | debugfs_remove_recursive(sdw_debugfs_root); | |
162 | } |