[mirror_ubuntu-artful-kernel.git] / drivers / cpufreq / s3c24xx-cpufreq-debugfs.c

/*
 * Copyright (c) 2009 Simtec Electronics
 *	http://armlinux.simtec.co.uk/
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * S3C24XX CPU Frequency scaling - debugfs status support
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/export.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/err.h>

#include <plat/cpu-freq-core.h>

static struct dentry *dbgfs_root;
static struct dentry *dbgfs_file_io;
static struct dentry *dbgfs_file_info;
static struct dentry *dbgfs_file_board;

#define print_ns(x) ((x) / 10), ((x) % 10)

static void show_max(struct seq_file *seq, struct s3c_freq *f)
{
	seq_printf(seq, "MAX: F=%lu, H=%lu, P=%lu, A=%lu\n",
		   f->fclk, f->hclk, f->pclk, f->armclk);
}

static int board_show(struct seq_file *seq, void *p)
{
	struct s3c_cpufreq_config *cfg;
	struct s3c_cpufreq_board *brd;

	cfg = s3c_cpufreq_getconfig();
	if (!cfg) {
		seq_printf(seq, "no configuration registered\n");
		return 0;
	}

	brd = cfg->board;
	if (!brd) {
		seq_printf(seq, "no board definition set?\n");
		return 0;
	}

	seq_printf(seq, "SDRAM refresh %u ns\n", brd->refresh);
	seq_printf(seq, "auto_io=%u\n", brd->auto_io);
	seq_printf(seq, "need_io=%u\n", brd->need_io);

	show_max(seq, &brd->max);


	return 0;
}

static int fops_board_open(struct inode *inode, struct file *file)
{
	return single_open(file, board_show, NULL);
}

static const struct file_operations fops_board = {
	.open		= fops_board_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
	.owner		= THIS_MODULE,
};

static int info_show(struct seq_file *seq, void *p)
{
	struct s3c_cpufreq_config *cfg;

	cfg = s3c_cpufreq_getconfig();
	if (!cfg) {
		seq_printf(seq, "no configuration registered\n");
		return 0;
	}

	seq_printf(seq, "  FCLK %ld Hz\n", cfg->freq.fclk);
	seq_printf(seq, "  HCLK %ld Hz (%lu.%lu ns)\n",
		   cfg->freq.hclk, print_ns(cfg->freq.hclk_tns));
	seq_printf(seq, "  PCLK %ld Hz\n", cfg->freq.hclk);
	seq_printf(seq, "ARMCLK %ld Hz\n", cfg->freq.armclk);
	seq_printf(seq, "\n");

	show_max(seq, &cfg->max);

	seq_printf(seq, "Divisors: P=%d, H=%d, A=%d, dvs=%s\n",
		   cfg->divs.h_divisor, cfg->divs.p_divisor,
		   cfg->divs.arm_divisor, cfg->divs.dvs ? "on" : "off");
	seq_printf(seq, "\n");

	seq_printf(seq, "lock_pll=%u\n", cfg->lock_pll);

	return 0;
}

static int fops_info_open(struct inode *inode, struct file *file)
{
	return single_open(file, info_show, NULL);
}

static const struct file_operations fops_info = {
	.open		= fops_info_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
	.owner		= THIS_MODULE,
};

static int io_show(struct seq_file *seq, void *p)
{
	void (*show_bank)(struct seq_file *, struct s3c_cpufreq_config *, union s3c_iobank *);
	struct s3c_cpufreq_config *cfg;
	struct s3c_iotimings *iot;
	union s3c_iobank *iob;
	int bank;

	cfg = s3c_cpufreq_getconfig();
	if (!cfg) {
		seq_printf(seq, "no configuration registered\n");
		return 0;
	}

	show_bank = cfg->info->debug_io_show;
	if (!show_bank) {
		seq_printf(seq, "no code to show bank timing\n");
		return 0;
	}

	iot = s3c_cpufreq_getiotimings();
	if (!iot) {
		seq_printf(seq, "no io timings registered\n");
		return 0;
	}

	seq_printf(seq, "hclk period is %lu.%lu ns\n", print_ns(cfg->freq.hclk_tns));

	for (bank = 0; bank < MAX_BANKS; bank++) {
		iob = &iot->bank[bank];

		seq_printf(seq, "bank %d: ", bank);

		if (!iob->io_2410) {
			seq_printf(seq, "nothing set\n");
			continue;
		}

		show_bank(seq, cfg, iob);
	}

	return 0;
}

static int fops_io_open(struct inode *inode, struct file *file)
{
	return single_open(file, io_show, NULL);
}

static const struct file_operations fops_io = {
	.open		= fops_io_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
	.owner		= THIS_MODULE,
};


static int __init s3c_freq_debugfs_init(void)
{
	dbgfs_root = debugfs_create_dir("s3c-cpufreq", NULL);
	if (IS_ERR(dbgfs_root)) {
		pr_err("%s: error creating debugfs root\n", __func__);
		return PTR_ERR(dbgfs_root);
	}

	dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
					    NULL, &fops_io);

	dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
					      NULL, &fops_info);

	dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
					       NULL, &fops_board);

	return 0;
}

late_initcall(s3c_freq_debugfs_init);
Commit	Line	Data
09ec1d7e	1	/*
e6d197a6 BD	2	* Copyright (c) 2009 Simtec Electronics
	3	* http://armlinux.simtec.co.uk/
	4	* Ben Dooks <ben@simtec.co.uk>
	5	*
	6	* S3C24XX CPU Frequency scaling - debugfs status support
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
1c5864e2 JP	13	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
1c5864e2 JP	14
e6d197a6	15	#include <linux/init.h>
a69e4c28	16	#include <linux/export.h>
e6d197a6 BD	17	#include <linux/interrupt.h>
	18	#include <linux/ioport.h>
	19	#include <linux/cpufreq.h>
	20	#include <linux/debugfs.h>
	21	#include <linux/seq_file.h>
	22	#include <linux/err.h>
	23
	24	#include <plat/cpu-freq-core.h>
	25
	26	static struct dentry *dbgfs_root;
	27	static struct dentry *dbgfs_file_io;
	28	static struct dentry *dbgfs_file_info;
	29	static struct dentry *dbgfs_file_board;
	30
	31	#define print_ns(x) ((x) / 10), ((x) % 10)
	32
	33	static void show_max(struct seq_file seq, struct s3c_freq f)
	34	{
	35	seq_printf(seq, "MAX: F=%lu, H=%lu, P=%lu, A=%lu\n",
	36	f->fclk, f->hclk, f->pclk, f->armclk);
	37	}
	38
	39	static int board_show(struct seq_file seq, void p)
	40	{
	41	struct s3c_cpufreq_config *cfg;
	42	struct s3c_cpufreq_board *brd;
	43
	44	cfg = s3c_cpufreq_getconfig();
	45	if (!cfg) {
	46	seq_printf(seq, "no configuration registered\n");
	47	return 0;
	48	}
	49
	50	brd = cfg->board;
	51	if (!brd) {
	52	seq_printf(seq, "no board definition set?\n");
	53	return 0;
	54	}
	55
	56	seq_printf(seq, "SDRAM refresh %u ns\n", brd->refresh);
	57	seq_printf(seq, "auto_io=%u\n", brd->auto_io);
	58	seq_printf(seq, "need_io=%u\n", brd->need_io);
	59
	60	show_max(seq, &brd->max);
	61
	62
	63	return 0;
	64	}
	65
	66	static int fops_board_open(struct inode inode, struct file file)
	67	{
	68	return single_open(file, board_show, NULL);
	69	}
	70
	71	static const struct file_operations fops_board = {
	72	.open = fops_board_open,
	73	.read = seq_read,
	74	.llseek = seq_lseek,
	75	.release = single_release,
	76	.owner = THIS_MODULE,
	77	};
	78
	79	static int info_show(struct seq_file seq, void p)
	80	{
81	struct s3c_cpufreq_config *cfg;
82
83	cfg = s3c_cpufreq_getconfig();
84	if (!cfg) {
85	seq_printf(seq, "no configuration registered\n");
86	return 0;
87	}
88
89	seq_printf(seq, " FCLK %ld Hz\n", cfg->freq.fclk);
90	seq_printf(seq, " HCLK %ld Hz (%lu.%lu ns)\n",
91	cfg->freq.hclk, print_ns(cfg->freq.hclk_tns));
92	seq_printf(seq, " PCLK %ld Hz\n", cfg->freq.hclk);
93	seq_printf(seq, "ARMCLK %ld Hz\n", cfg->freq.armclk);
94	seq_printf(seq, "\n");
95
96	show_max(seq, &cfg->max);
97
98	seq_printf(seq, "Divisors: P=%d, H=%d, A=%d, dvs=%s\n",
99	cfg->divs.h_divisor, cfg->divs.p_divisor,
100	cfg->divs.arm_divisor, cfg->divs.dvs ? "on" : "off");
101	seq_printf(seq, "\n");
102
103	seq_printf(seq, "lock_pll=%u\n", cfg->lock_pll);
104
105	return 0;
106	}
107
108	static int fops_info_open(struct inode inode, struct file file)
109	{
110	return single_open(file, info_show, NULL);
111	}
112
113	static const struct file_operations fops_info = {
114	.open = fops_info_open,
115	.read = seq_read,
116	.llseek = seq_lseek,
117	.release = single_release,
118	.owner = THIS_MODULE,
119	};
120
121	static int io_show(struct seq_file seq, void p)
122	{
123	void (show_bank)(struct seq_file , struct s3c_cpufreq_config , union s3c_iobank );
124	struct s3c_cpufreq_config *cfg;
125	struct s3c_iotimings *iot;
126	union s3c_iobank *iob;
127	int bank;
128
129	cfg = s3c_cpufreq_getconfig();
130	if (!cfg) {
131	seq_printf(seq, "no configuration registered\n");
132	return 0;
133	}
134
135	show_bank = cfg->info->debug_io_show;
136	if (!show_bank) {
137	seq_printf(seq, "no code to show bank timing\n");
138	return 0;
139	}
140
141	iot = s3c_cpufreq_getiotimings();
142	if (!iot) {
143	seq_printf(seq, "no io timings registered\n");
144	return 0;
145	}
146
147	seq_printf(seq, "hclk period is %lu.%lu ns\n", print_ns(cfg->freq.hclk_tns));
148
149	for (bank = 0; bank < MAX_BANKS; bank++) {
150	iob = &iot->bank[bank];
151
152	seq_printf(seq, "bank %d: ", bank);
153
154	if (!iob->io_2410) {
155	seq_printf(seq, "nothing set\n");
156	continue;
157	}
158
159	show_bank(seq, cfg, iob);
160	}
161
162	return 0;
163	}
164
165	static int fops_io_open(struct inode inode, struct file file)
166	{
167	return single_open(file, io_show, NULL);
168	}
169
170	static const struct file_operations fops_io = {
171	.open = fops_io_open,
172	.read = seq_read,
173	.llseek = seq_lseek,
174	.release = single_release,
175	.owner = THIS_MODULE,
176	};
177
178
179	static int __init s3c_freq_debugfs_init(void)
180	{
181	dbgfs_root = debugfs_create_dir("s3c-cpufreq", NULL);
182	if (IS_ERR(dbgfs_root)) {
b49c22a6	183	pr_err("%s: error creating debugfs root\n", __func__);
e6d197a6 BD	184	return PTR_ERR(dbgfs_root);
	185	}
	186
	187	dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
	188	NULL, &fops_io);
	189
	190	dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
	191	NULL, &fops_info);
	192
	193	dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
	194	NULL, &fops_board);
	195
	196	return 0;
	197	}
	198
	199	late_initcall(s3c_freq_debugfs_init);
	200