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13#include <linux/init.h>
14#include <linux/export.h>
15#include <linux/interrupt.h>
16#include <linux/ioport.h>
17#include <linux/cpufreq.h>
18#include <linux/debugfs.h>
19#include <linux/seq_file.h>
20#include <linux/err.h>
21
22#include <plat/cpu-freq-core.h>
23
24static struct dentry *dbgfs_root;
25static struct dentry *dbgfs_file_io;
26static struct dentry *dbgfs_file_info;
27static struct dentry *dbgfs_file_board;
28
29#define print_ns(x) ((x) / 10), ((x) % 10)
30
31static void show_max(struct seq_file *seq, struct s3c_freq *f)
32{
33 seq_printf(seq, "MAX: F=%lu, H=%lu, P=%lu, A=%lu\n",
34 f->fclk, f->hclk, f->pclk, f->armclk);
35}
36
37static int board_show(struct seq_file *seq, void *p)
38{
39 struct s3c_cpufreq_config *cfg;
40 struct s3c_cpufreq_board *brd;
41
42 cfg = s3c_cpufreq_getconfig();
43 if (!cfg) {
44 seq_printf(seq, "no configuration registered\n");
45 return 0;
46 }
47
48 brd = cfg->board;
49 if (!brd) {
50 seq_printf(seq, "no board definition set?\n");
51 return 0;
52 }
53
54 seq_printf(seq, "SDRAM refresh %u ns\n", brd->refresh);
55 seq_printf(seq, "auto_io=%u\n", brd->auto_io);
56 seq_printf(seq, "need_io=%u\n", brd->need_io);
57
58 show_max(seq, &brd->max);
59
60
61 return 0;
62}
63
64static int fops_board_open(struct inode *inode, struct file *file)
65{
66 return single_open(file, board_show, NULL);
67}
68
69static const struct file_operations fops_board = {
70 .open = fops_board_open,
71 .read = seq_read,
72 .llseek = seq_lseek,
73 .release = single_release,
74 .owner = THIS_MODULE,
75};
76
77static int info_show(struct seq_file *seq, void *p)
78{
79 struct s3c_cpufreq_config *cfg;
80
81 cfg = s3c_cpufreq_getconfig();
82 if (!cfg) {
83 seq_printf(seq, "no configuration registered\n");
84 return 0;
85 }
86
87 seq_printf(seq, " FCLK %ld Hz\n", cfg->freq.fclk);
88 seq_printf(seq, " HCLK %ld Hz (%lu.%lu ns)\n",
89 cfg->freq.hclk, print_ns(cfg->freq.hclk_tns));
90 seq_printf(seq, " PCLK %ld Hz\n", cfg->freq.hclk);
91 seq_printf(seq, "ARMCLK %ld Hz\n", cfg->freq.armclk);
92 seq_printf(seq, "\n");
93
94 show_max(seq, &cfg->max);
95
96 seq_printf(seq, "Divisors: P=%d, H=%d, A=%d, dvs=%s\n",
97 cfg->divs.h_divisor, cfg->divs.p_divisor,
98 cfg->divs.arm_divisor, cfg->divs.dvs ? "on" : "off");
99 seq_printf(seq, "\n");
100
101 seq_printf(seq, "lock_pll=%u\n", cfg->lock_pll);
102
103 return 0;
104}
105
106static int fops_info_open(struct inode *inode, struct file *file)
107{
108 return single_open(file, info_show, NULL);
109}
110
111static const struct file_operations fops_info = {
112 .open = fops_info_open,
113 .read = seq_read,
114 .llseek = seq_lseek,
115 .release = single_release,
116 .owner = THIS_MODULE,
117};
118
119static int io_show(struct seq_file *seq, void *p)
120{
121 void (*show_bank)(struct seq_file *, struct s3c_cpufreq_config *, union s3c_iobank *);
122 struct s3c_cpufreq_config *cfg;
123 struct s3c_iotimings *iot;
124 union s3c_iobank *iob;
125 int bank;
126
127 cfg = s3c_cpufreq_getconfig();
128 if (!cfg) {
129 seq_printf(seq, "no configuration registered\n");
130 return 0;
131 }
132
133 show_bank = cfg->info->debug_io_show;
134 if (!show_bank) {
135 seq_printf(seq, "no code to show bank timing\n");
136 return 0;
137 }
138
139 iot = s3c_cpufreq_getiotimings();
140 if (!iot) {
141 seq_printf(seq, "no io timings registered\n");
142 return 0;
143 }
144
145 seq_printf(seq, "hclk period is %lu.%lu ns\n", print_ns(cfg->freq.hclk_tns));
146
147 for (bank = 0; bank < MAX_BANKS; bank++) {
148 iob = &iot->bank[bank];
149
150 seq_printf(seq, "bank %d: ", bank);
151
152 if (!iob->io_2410) {
153 seq_printf(seq, "nothing set\n");
154 continue;
155 }
156
157 show_bank(seq, cfg, iob);
158 }
159
160 return 0;
161}
162
163static int fops_io_open(struct inode *inode, struct file *file)
164{
165 return single_open(file, io_show, NULL);
166}
167
168static const struct file_operations fops_io = {
169 .open = fops_io_open,
170 .read = seq_read,
171 .llseek = seq_lseek,
172 .release = single_release,
173 .owner = THIS_MODULE,
174};
175
176
177static int __init s3c_freq_debugfs_init(void)
178{
179 dbgfs_root = debugfs_create_dir("s3c-cpufreq", NULL);
180 if (IS_ERR(dbgfs_root)) {
181 printk(KERN_ERR "%s: error creating debugfs root\n", __func__);
182 return PTR_ERR(dbgfs_root);
183 }
184
185 dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
186 NULL, &fops_io);
187
188 dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
189 NULL, &fops_info);
190
191 dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
192 NULL, &fops_board);
193
194 return 0;
195}
196
197late_initcall(s3c_freq_debugfs_init);
198
199
