--- /dev/null
+/* linux/arch/arm/plat-s3c24xx/cpu-freq-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.
+*/
+
+#include <linux/init.h>
+#include <linux/module.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)) {
+ printk(KERN_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);
+
#include <plat/cpu-freq.h>
+struct seq_file;
+
#define MAX_BANKS (8)
#define S3C2412_MAX_IO (8)
struct cpufreq_frequency_table *t,
size_t table_size);
+ void (*debug_io_show)(struct seq_file *seq,
+ struct s3c_cpufreq_config *cfg,
+ union s3c_iobank *iob);
+
void (*set_refresh)(struct s3c_cpufreq_config *cfg);
void (*set_fvco)(struct s3c_cpufreq_config *cfg);
void (*set_divs)(struct s3c_cpufreq_config *cfg);
extern int s3c_plltab_register(struct cpufreq_frequency_table *plls, unsigned int plls_no);
+/* exports and utilities for debugfs */
+extern struct s3c_cpufreq_config *s3c_cpufreq_getconfig(void);
+extern struct s3c_iotimings *s3c_cpufreq_getiotimings(void);
+
+extern void s3c2410_iotiming_debugfs(struct seq_file *seq,
+ struct s3c_cpufreq_config *cfg,
+ union s3c_iobank *iob);
+
+extern void s3c2412_iotiming_debugfs(struct seq_file *seq,
+ struct s3c_cpufreq_config *cfg,
+ union s3c_iobank *iob);
+
+#ifdef CONFIG_CPU_FREQ_S3C24XX_DEBUGFS
+#define s3c_cpufreq_debugfs_call(x) x
+#else
+#define s3c_cpufreq_debugfs_call(x) NULL
+#endif
+
/* Useful utility functions. */
extern struct clk *s3c_cpufreq_clk_get(struct device *, const char *);
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/cpufreq.h>
+#include <linux/seq_file.h>
#include <linux/io.h>
#include <mach/map.h>
}
/**
+ * s3c2410_iotiming_debugfs - debugfs show io bank timing information
+ * @seq: The seq_file to write output to using seq_printf().
+ * @cfg: The current configuration.
+ * @iob: The IO bank information to decode.
+ */
+void s3c2410_iotiming_debugfs(struct seq_file *seq,
+ struct s3c_cpufreq_config *cfg,
+ union s3c_iobank *iob)
+{
+ struct s3c2410_iobank_timing *bt = iob->io_2410;
+ unsigned long bankcon = bt->bankcon;
+ unsigned long hclk = cfg->freq.hclk_tns;
+ unsigned int tacs;
+ unsigned int tcos;
+ unsigned int tacc;
+ unsigned int tcoh;
+ unsigned int tcah;
+
+ seq_printf(seq, "BANKCON=0x%08lx\n", bankcon);
+
+ tcah = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcah_SHIFT);
+ tcoh = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcoh_SHIFT);
+ tcos = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcos_SHIFT);
+ tacs = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tacs_SHIFT);
+ tacc = get_tacc(hclk, bankcon >> S3C2410_BANKCON_Tacc_SHIFT);
+
+ seq_printf(seq,
+ "\tRead: Tacs=%d.%d, Tcos=%d.%d, Tacc=%d.%d, Tcoh=%d.%d, Tcah=%d.%d\n",
+ print_ns(bt->tacs),
+ print_ns(bt->tcos),
+ print_ns(bt->tacc),
+ print_ns(bt->tcoh),
+ print_ns(bt->tcah));
+
+ seq_printf(seq,
+ "\t Set: Tacs=%d.%d, Tcos=%d.%d, Tacc=%d.%d, Tcoh=%d.%d, Tcah=%d.%d\n",
+ print_ns(tacs),
+ print_ns(tcos),
+ print_ns(tacc),
+ print_ns(tcoh),
+ print_ns(tcah));
+}
+
+/**
* s3c2410_iotiming_calc - Calculate bank timing for frequency change.
* @cfg: The frequency configuration
* @iot: The IO timing information to fill out.
projects / platform / upstream / kernel-adaptation-pc.git / commitdiff