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14#include <linux/init.h>
15#include <linux/module.h>
16#include <linux/interrupt.h>
17#include <linux/ioport.h>
18#include <linux/cpufreq.h>
19#include <linux/debugfs.h>
20#include <linux/seq_file.h>
21#include <linux/err.h>
22
23#include <plat/cpu-freq-core.h>
24
25static struct dentry *dbgfs_root;
26static struct dentry *dbgfs_file_io;
27static struct dentry *dbgfs_file_info;
28static struct dentry *dbgfs_file_board;
29
30#define print_ns(x) ((x) / 10), ((x) % 10)
31
32static void show_max(struct seq_file *seq, struct s3c_freq *f)
33{
34 seq_printf(seq, "MAX: F=%lu, H=%lu, P=%lu, A=%lu\n",
35 f->fclk, f->hclk, f->pclk, f->armclk);
36}
37
38static int board_show(struct seq_file *seq, void *p)
39{
40 struct s3c_cpufreq_config *cfg;
41 struct s3c_cpufreq_board *brd;
42
43 cfg = s3c_cpufreq_getconfig();
44 if (!cfg) {
45 seq_printf(seq, "no configuration registered\n");
46 return 0;
47 }
48
49 brd = cfg->board;
50 if (!brd) {
51 seq_printf(seq, "no board definition set?\n");
52 return 0;
53 }
54
55 seq_printf(seq, "SDRAM refresh %u ns\n", brd->refresh);
56 seq_printf(seq, "auto_io=%u\n", brd->auto_io);
57 seq_printf(seq, "need_io=%u\n", brd->need_io);
58
59 show_max(seq, &brd->max);
60
61
62 return 0;
63}
64
65static int fops_board_open(struct inode *inode, struct file *file)
66{
67 return single_open(file, board_show, NULL);
68}
69
70static const struct file_operations fops_board = {
71 .open = fops_board_open,
72 .read = seq_read,
73 .llseek = seq_lseek,
74 .release = single_release,
75 .owner = THIS_MODULE,
76};
77
78static int info_show(struct seq_file *seq, void *p)
79{
80 struct s3c_cpufreq_config *cfg;
81
82 cfg = s3c_cpufreq_getconfig();
83 if (!cfg) {
84 seq_printf(seq, "no configuration registered\n");
85 return 0;
86 }
87
88 seq_printf(seq, " FCLK %ld Hz\n", cfg->freq.fclk);
89 seq_printf(seq, " HCLK %ld Hz (%lu.%lu ns)\n",
90 cfg->freq.hclk, print_ns(cfg->freq.hclk_tns));
91 seq_printf(seq, " PCLK %ld Hz\n", cfg->freq.hclk);
92 seq_printf(seq, "ARMCLK %ld Hz\n", cfg->freq.armclk);
93 seq_printf(seq, "\n");
94
95 show_max(seq, &cfg->max);
96
97 seq_printf(seq, "Divisors: P=%d, H=%d, A=%d, dvs=%s\n",
98 cfg->divs.h_divisor, cfg->divs.p_divisor,
99 cfg->divs.arm_divisor, cfg->divs.dvs ? "on" : "off");
100 seq_printf(seq, "\n");
101
102 seq_printf(seq, "lock_pll=%u\n", cfg->lock_pll);
103
104 return 0;
105}
106
107static int fops_info_open(struct inode *inode, struct file *file)
108{
109 return single_open(file, info_show, NULL);
110}
111
112static const struct file_operations fops_info = {
113 .open = fops_info_open,
114 .read = seq_read,
115 .llseek = seq_lseek,
116 .release = single_release,
117 .owner = THIS_MODULE,
118};
119
120static int io_show(struct seq_file *seq, void *p)
121{
122 void (*show_bank)(struct seq_file *, struct s3c_cpufreq_config *, union s3c_iobank *);
123 struct s3c_cpufreq_config *cfg;
124 struct s3c_iotimings *iot;
125 union s3c_iobank *iob;
126 int bank;
127
128 cfg = s3c_cpufreq_getconfig();
129 if (!cfg) {
130 seq_printf(seq, "no configuration registered\n");
131 return 0;
132 }
133
134 show_bank = cfg->info->debug_io_show;
135 if (!show_bank) {
136 seq_printf(seq, "no code to show bank timing\n");
137 return 0;
138 }
139
140 iot = s3c_cpufreq_getiotimings();
141 if (!iot) {
142 seq_printf(seq, "no io timings registered\n");
143 return 0;
144 }
145
146 seq_printf(seq, "hclk period is %lu.%lu ns\n", print_ns(cfg->freq.hclk_tns));
147
148 for (bank = 0; bank < MAX_BANKS; bank++) {
149 iob = &iot->bank[bank];
150
151 seq_printf(seq, "bank %d: ", bank);
152
153 if (!iob->io_2410) {
154 seq_printf(seq, "nothing set\n");
155 continue;
156 }
157
158 show_bank(seq, cfg, iob);
159 }
160
161 return 0;
162}
163
164static int fops_io_open(struct inode *inode, struct file *file)
165{
166 return single_open(file, io_show, NULL);
167}
168
169static const struct file_operations fops_io = {
170 .open = fops_io_open,
171 .read = seq_read,
172 .llseek = seq_lseek,
173 .release = single_release,
174 .owner = THIS_MODULE,
175};
176
177
178static int __init s3c_freq_debugfs_init(void)
179{
180 dbgfs_root = debugfs_create_dir("s3c-cpufreq", NULL);
181 if (IS_ERR(dbgfs_root)) {
182 printk(KERN_ERR "%s: error creating debugfs root\n", __func__);
183 return PTR_ERR(dbgfs_root);
184 }
185
186 dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
187 NULL, &fops_io);
188
189 dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
190 NULL, &fops_info);
191
192 dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
193 NULL, &fops_board);
194
195 return 0;
196}
197
198late_initcall(s3c_freq_debugfs_init);
199
200
