1 files changed, 996 insertions, 0 deletions

diff --git a/arch/cris/arch-v32/kernel/fasttimer.c b/arch/cris/arch-v32/kernel/fasttimer.c
new file mode 100644
index 000000000000..ea2b4a97c8c7
--- /dev/null
+++ b/arch/cris/arch-v32/kernel/fasttimer.c
@@ -0,0 +1,996 @@
+/* $Id: fasttimer.c,v 1.11 2005/01/04 11:15:46 starvik Exp $
+ * linux/arch/cris/kernel/fasttimer.c
+ *
+ * Fast timers for ETRAX FS
+ * This may be useful in other OS than Linux so use 2 space indentation...
+ *
+ * $Log: fasttimer.c,v $
+ * Revision 1.11  2005/01/04 11:15:46  starvik
+ * Don't share timer IRQ.
+ *
+ * Revision 1.10  2004/12/07 09:19:38  starvik
+ * Corrected includes.
+ * Use correct interrupt macros.
+ *
+ * Revision 1.9  2004/05/14 10:18:58  starvik
+ * Export fast_timer_list
+ *
+ * Revision 1.8  2004/05/14 07:58:03  starvik
+ * Merge of changes from 2.4
+ *
+ * Revision 1.7  2003/07/10 12:06:14  starvik
+ * Return IRQ_NONE if irq wasn't handled
+ *
+ * Revision 1.6  2003/07/04 08:27:49  starvik
+ * Merge of Linux 2.5.74
+ *
+ * Revision 1.5  2003/06/05 10:16:22  johana
+ * New INTR_VECT macros.
+ *
+ * Revision 1.4  2003/06/03 08:49:45  johana
+ * Fixed typo.
+ *
+ * Revision 1.3  2003/06/02 12:51:27  johana
+ * Now compiles.
+ * Commented some include files that probably can be removed.
+ *
+ * Revision 1.2  2003/06/02 12:09:41  johana
+ * Ported to ETRAX FS using the trig interrupt instead of timer1.
+ *
+ * Revision 1.3  2002/12/12 08:26:32  starvik
+ * Don't use C-comments inside CVS comments
+ *
+ * Revision 1.2  2002/12/11 15:42:02  starvik
+ * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/
+ *
+ * Revision 1.1  2002/11/18 07:58:06  starvik
+ * Fast timers (from Linux 2.4)
+ *
+ * Revision 1.5  2002/10/15 06:21:39  starvik
+ * Added call to init_waitqueue_head
+ *
+ * Revision 1.4  2002/05/28 17:47:59  johana
+ * Added del_fast_timer()
+ *
+ * Revision 1.3  2002/05/28 16:16:07  johana
+ * Handle empty fast_timer_list
+ *
+ * Revision 1.2  2002/05/27 15:38:42  johana
+ * Made it compile without warnings on Linux 2.4.
+ * (includes, wait_queue, PROC_FS and snprintf)
+ *
+ * Revision 1.1  2002/05/27 15:32:25  johana
+ * arch/etrax100/kernel/fasttimer.c v1.8 from the elinux tree.
+ *
+ * Revision 1.8  2001/11/27 13:50:40  pkj
+ * Disable interrupts while stopping the timer and while modifying the
+ * list of active timers in timer1_handler() as it may be interrupted
+ * by other interrupts (e.g., the serial interrupt) which may add fast
+ * timers.
+ *
+ * Revision 1.7  2001/11/22 11:50:32  pkj
+ * * Only store information about the last 16 timers.
+ * * proc_fasttimer_read() now uses an allocated buffer, since it
+ *   requires more space than just a page even for only writing the
+ *   last 16 timers. The buffer is only allocated on request, so
+ *   unless /proc/fasttimer is read, it is never allocated.
+ * * Renamed fast_timer_started to fast_timers_started to match
+ *   fast_timers_added and fast_timers_expired.
+ * * Some clean-up.
+ *
+ * Revision 1.6  2000/12/13 14:02:08  johana
+ * Removed volatile for fast_timer_list
+ *
+ * Revision 1.5  2000/12/13 13:55:35  johana
+ * Added DEBUG_LOG, added som cli() and cleanup
+ *
+ * Revision 1.4  2000/12/05 13:48:50  johana
+ * Added range check when writing proc file, modified timer int handling
+ *
+ * Revision 1.3  2000/11/23 10:10:20  johana
+ * More debug/logging possibilities.
+ * Moved GET_JIFFIES_USEC() to timex.h and time.c
+ *
+ * Revision 1.2  2000/11/01 13:41:04  johana
+ * Clean up and bugfixes.
+ * Created new do_gettimeofday_fast() that gets a timeval struct
+ * with time based on jiffies and *R_TIMER0_DATA, uses a table
+ * for fast conversion of timer value to microseconds.
+ * (Much faster the standard do_gettimeofday() and we don't really
+ * wan't to use the true time - we wan't the "uptime" so timers don't screw up
+ * when we change the time.
+ * TODO: Add efficient support for continuous timers as well.
+ *
+ * Revision 1.1  2000/10/26 15:49:16  johana
+ * Added fasttimer, highresolution timers.
+ *
+ * Copyright (C) 2000,2001 2002, 2003 Axis Communications AB, Lund, Sweden
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/vmalloc.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+
+#include <asm/irq.h>
+#include <asm/system.h>
+
+#include <linux/config.h>
+#include <linux/version.h>
+
+#include <asm/arch/hwregs/reg_map.h>
+#include <asm/arch/hwregs/reg_rdwr.h>
+#include <asm/arch/hwregs/timer_defs.h>
+#include <asm/fasttimer.h>
+#include <linux/proc_fs.h>
+
+/*
+ * timer0 is running at 100MHz and generating jiffies timer ticks
+ * at 100 or 1000 HZ.
+ * fasttimer gives an API that gives timers that expire "between" the jiffies
+ * giving microsecond resolution (10 ns).
+ * fasttimer uses reg_timer_rw_trig register to get interrupt when
+ * r_time reaches a certain value.
+ */
+
+
+#define DEBUG_LOG_INCLUDED
+#define FAST_TIMER_LOG
+//#define FAST_TIMER_TEST
+
+#define FAST_TIMER_SANITY_CHECKS
+
+#ifdef FAST_TIMER_SANITY_CHECKS
+#define SANITYCHECK(x) x
+static int sanity_failed = 0;
+#else
+#define SANITYCHECK(x)
+#endif
+
+#define D1(x)
+#define D2(x)
+#define DP(x)
+
+#define __INLINE__ inline
+
+static int fast_timer_running = 0;
+static int fast_timers_added = 0;
+static int fast_timers_started = 0;
+static int fast_timers_expired = 0;
+static int fast_timers_deleted = 0;
+static int fast_timer_is_init = 0;
+static int fast_timer_ints = 0;
+
+struct fast_timer *fast_timer_list = NULL;
+
+#ifdef DEBUG_LOG_INCLUDED
+#define DEBUG_LOG_MAX 128
+static const char * debug_log_string[DEBUG_LOG_MAX];
+static unsigned long debug_log_value[DEBUG_LOG_MAX];
+static int debug_log_cnt = 0;
+static int debug_log_cnt_wrapped = 0;
+
+#define DEBUG_LOG(string, value) \
+{ \
+  unsigned long log_flags; \
+  local_irq_save(log_flags); \
+  debug_log_string[debug_log_cnt] = (string); \
+  debug_log_value[debug_log_cnt] = (unsigned long)(value); \
+  if (++debug_log_cnt >= DEBUG_LOG_MAX) \
+  { \
+    debug_log_cnt = debug_log_cnt % DEBUG_LOG_MAX; \
+    debug_log_cnt_wrapped = 1; \
+  } \
+  local_irq_restore(log_flags); \
+}
+#else
+#define DEBUG_LOG(string, value)
+#endif
+
+
+#define NUM_TIMER_STATS 16
+#ifdef FAST_TIMER_LOG
+struct fast_timer timer_added_log[NUM_TIMER_STATS];
+struct fast_timer timer_started_log[NUM_TIMER_STATS];
+struct fast_timer timer_expired_log[NUM_TIMER_STATS];
+#endif
+
+int timer_div_settings[NUM_TIMER_STATS];
+int timer_delay_settings[NUM_TIMER_STATS];
+
+
+static void
+timer_trig_handler(void);
+
+
+
+/* Not true gettimeofday, only checks the jiffies (uptime) + useconds */
+void __INLINE__ do_gettimeofday_fast(struct timeval *tv)
+{
+  unsigned long sec = jiffies;
+  unsigned long usec = GET_JIFFIES_USEC();
+
+  usec += (sec % HZ) * (1000000 / HZ);
+  sec = sec / HZ;
+
+  if (usec > 1000000)
+  {
+    usec -= 1000000;
+    sec++;
+  }
+  tv->tv_sec = sec;
+  tv->tv_usec = usec;
+}
+
+int __INLINE__ timeval_cmp(struct timeval *t0, struct timeval *t1)
+{
+  if (t0->tv_sec < t1->tv_sec)
+  {
+    return -1;
+  }
+  else if (t0->tv_sec > t1->tv_sec)
+  {
+    return 1;
+  }
+  if (t0->tv_usec < t1->tv_usec)
+  {
+    return -1;
+  }
+  else if (t0->tv_usec > t1->tv_usec)
+  {
+    return 1;
+  }
+  return 0;
+}
+
+/* Called with ints off */
+void __INLINE__ start_timer_trig(unsigned long delay_us)
+{
+  reg_timer_rw_ack_intr ack_intr = { 0 };
+  reg_timer_rw_intr_mask intr_mask;
+  reg_timer_rw_trig trig;
+  reg_timer_rw_trig_cfg trig_cfg = { 0 };
+  reg_timer_r_time r_time;
+
+  r_time = REG_RD(timer, regi_timer, r_time);
+
+  D1(printk("start_timer_trig : %d us freq: %i div: %i\n",
+            delay_us, freq_index, div));
+  /* Clear trig irq */
+  intr_mask = REG_RD(timer, regi_timer, rw_intr_mask);
+  intr_mask.trig = 0;
+  REG_WR(timer, regi_timer, rw_intr_mask, intr_mask);
+
+  /* Set timer values */
+  /* r_time is 100MHz (10 ns resolution) */
+  trig = r_time + delay_us*(1000/10);
+
+  timer_div_settings[fast_timers_started % NUM_TIMER_STATS] = trig;
+  timer_delay_settings[fast_timers_started % NUM_TIMER_STATS] = delay_us;
+
+  /* Ack interrupt */
+  ack_intr.trig = 1;
+  REG_WR(timer, regi_timer, rw_ack_intr, ack_intr);
+
+  /* Start timer */
+  REG_WR(timer, regi_timer, rw_trig, trig);
+  trig_cfg.tmr = regk_timer_time;
+  REG_WR(timer, regi_timer, rw_trig_cfg, trig_cfg);
+
+  /* Check if we have already passed the trig time */
+  r_time = REG_RD(timer, regi_timer, r_time);
+  if (r_time < trig) {
+    /* No, Enable trig irq */
+    intr_mask = REG_RD(timer, regi_timer, rw_intr_mask);
+    intr_mask.trig = 1;
+    REG_WR(timer, regi_timer, rw_intr_mask, intr_mask);
+    fast_timers_started++;
+    fast_timer_running = 1;
+  }
+  else
+  {
+    /* We have passed the time, disable trig point, ack intr */
+    trig_cfg.tmr = regk_timer_off;
+    REG_WR(timer, regi_timer, rw_trig_cfg, trig_cfg);
+    REG_WR(timer, regi_timer, rw_ack_intr, ack_intr);
+    /* call the int routine directly */
+    timer_trig_handler();
+  }
+
+}
+
+/* In version 1.4 this function takes 27 - 50 us */
+void start_one_shot_timer(struct fast_timer *t,
+                          fast_timer_function_type *function,
+                          unsigned long data,
+                          unsigned long delay_us,
+                          const char *name)
+{
+  unsigned long flags;
+  struct fast_timer *tmp;
+
+  D1(printk("sft %s %d us\n", name, delay_us));
+
+  local_irq_save(flags);
+
+  do_gettimeofday_fast(&t->tv_set);
+  tmp = fast_timer_list;
+
+  SANITYCHECK({ /* Check so this is not in the list already... */
+    while (tmp != NULL)
+    {
+      if (tmp == t)
+      {
+        printk("timer name: %s data: 0x%08lX already in list!\n", name, data);
+        sanity_failed++;
+        return;
+      }
+      else
+      {
+        tmp = tmp->next;
+      }
+    }
+    tmp = fast_timer_list;
+  });
+
+  t->delay_us = delay_us;
+  t->function = function;
+  t->data = data;
+  t->name = name;
+
+  t->tv_expires.tv_usec = t->tv_set.tv_usec + delay_us % 1000000;
+  t->tv_expires.tv_sec  = t->tv_set.tv_sec  + delay_us / 1000000;
+  if (t->tv_expires.tv_usec > 1000000)
+  {
+    t->tv_expires.tv_usec -= 1000000;
+    t->tv_expires.tv_sec++;
+  }
+#ifdef FAST_TIMER_LOG
+  timer_added_log[fast_timers_added % NUM_TIMER_STATS] = *t;
+#endif
+  fast_timers_added++;
+
+  /* Check if this should timeout before anything else */
+  if (tmp == NULL || timeval_cmp(&t->tv_expires, &tmp->tv_expires) < 0)
+  {
+    /* Put first in list and modify the timer value */
+    t->prev = NULL;
+    t->next = fast_timer_list;
+    if (fast_timer_list)
+    {
+      fast_timer_list->prev = t;
+    }
+    fast_timer_list = t;
+#ifdef FAST_TIMER_LOG
+    timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
+#endif
+    start_timer_trig(delay_us);
+  } else {
+    /* Put in correct place in list */
+    while (tmp->next &&
+           timeval_cmp(&t->tv_expires, &tmp->next->tv_expires) > 0)
+    {
+      tmp = tmp->next;
+    }
+    /* Insert t after tmp */
+    t->prev = tmp;
+    t->next = tmp->next;
+    if (tmp->next)
+    {
+      tmp->next->prev = t;
+    }
+    tmp->next = t;
+  }
+
+  D2(printk("start_one_shot_timer: %d us done\n", delay_us));
+
+  local_irq_restore(flags);
+} /* start_one_shot_timer */
+
+static inline int fast_timer_pending (const struct fast_timer * t)
+{
+  return (t->next != NULL) || (t->prev != NULL) || (t == fast_timer_list);
+}
+
+static inline int detach_fast_timer (struct fast_timer *t)
+{
+  struct fast_timer *next, *prev;
+  if (!fast_timer_pending(t))
+    return 0;
+  next = t->next;
+  prev = t->prev;
+  if (next)
+    next->prev = prev;
+  if (prev)
+    prev->next = next;
+  else
+    fast_timer_list = next;
+  fast_timers_deleted++;
+  return 1;
+}
+
+int del_fast_timer(struct fast_timer * t)
+{
+  unsigned long flags;
+  int ret;
+
+  local_irq_save(flags);
+  ret = detach_fast_timer(t);
+  t->next = t->prev = NULL;
+  local_irq_restore(flags);
+  return ret;
+} /* del_fast_timer */
+
+
+/* Interrupt routines or functions called in interrupt context */
+
+/* Timer interrupt handler for trig interrupts */
+
+static irqreturn_t
+timer_trig_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+  reg_timer_r_masked_intr masked_intr;
+
+  /* Check if the timer interrupt is for us (a trig int) */
+  masked_intr = REG_RD(timer, regi_timer, r_masked_intr);
+  if (!masked_intr.trig)
+    return IRQ_NONE;
+  timer_trig_handler();
+  return IRQ_HANDLED;
+}
+
+static void timer_trig_handler(void)
+{
+  reg_timer_rw_ack_intr ack_intr = { 0 };
+  reg_timer_rw_intr_mask intr_mask;
+  reg_timer_rw_trig_cfg trig_cfg = { 0 };
+  struct fast_timer *t;
+  unsigned long flags;
+
+  local_irq_save(flags);
+
+  /* Clear timer trig interrupt */
+  intr_mask = REG_RD(timer, regi_timer, rw_intr_mask);
+  intr_mask.trig = 0;
+  REG_WR(timer, regi_timer, rw_intr_mask, intr_mask);
+
+  /* First stop timer, then ack interrupt */
+  /* Stop timer */
+  trig_cfg.tmr = regk_timer_off;
+  REG_WR(timer, regi_timer, rw_trig_cfg, trig_cfg);
+
+  /* Ack interrupt */
+  ack_intr.trig = 1;
+  REG_WR(timer, regi_timer, rw_ack_intr, ack_intr);
+
+  fast_timer_running = 0;
+  fast_timer_ints++;
+
+  local_irq_restore(flags);
+
+  t = fast_timer_list;
+  while (t)
+  {
+    struct timeval tv;
+
+    /* Has it really expired? */
+    do_gettimeofday_fast(&tv);
+    D1(printk("t: %is %06ius\n", tv.tv_sec, tv.tv_usec));
+
+    if (timeval_cmp(&t->tv_expires, &tv) <= 0)
+    {
+      /* Yes it has expired */
+#ifdef FAST_TIMER_LOG
+      timer_expired_log[fast_timers_expired % NUM_TIMER_STATS] = *t;
+#endif
+      fast_timers_expired++;
+
+      /* Remove this timer before call, since it may reuse the timer */
+      local_irq_save(flags);
+      if (t->prev)
+      {
+        t->prev->next = t->next;
+      }
+      else
+      {
+        fast_timer_list = t->next;
+      }
+      if (t->next)
+      {
+        t->next->prev = t->prev;
+      }
+      t->prev = NULL;
+      t->next = NULL;
+      local_irq_restore(flags);
+
+      if (t->function != NULL)
+      {
+        t->function(t->data);
+      }
+      else
+      {
+        DEBUG_LOG("!trimertrig %i function==NULL!\n", fast_timer_ints);
+      }
+    }
+    else
+    {
+      /* Timer is to early, let's set it again using the normal routines */
+      D1(printk(".\n"));
+    }
+
+    local_irq_save(flags);
+    if ((t = fast_timer_list) != NULL)
+    {
+      /* Start next timer.. */
+      long us;
+      struct timeval tv;
+
+      do_gettimeofday_fast(&tv);
+      us = ((t->tv_expires.tv_sec - tv.tv_sec) * 1000000 +
+            t->tv_expires.tv_usec - tv.tv_usec);
+      if (us > 0)
+      {
+        if (!fast_timer_running)
+        {
+#ifdef FAST_TIMER_LOG
+          timer_started_log[fast_timers_started % NUM_TIMER_STATS] = *t;
+#endif
+          start_timer_trig(us);
+        }
+        local_irq_restore(flags);
+        break;
+      }
+      else
+      {
+        /* Timer already expired, let's handle it better late than never.
+         * The normal loop handles it
+         */
+        D1(printk("e! %d\n", us));
+      }
+    }
+    local_irq_restore(flags);
+  }
+
+  if (!t)
+  {
+    D1(printk("ttrig stop!\n"));
+  }
+}
+
+static void wake_up_func(unsigned long data)
+{
+#ifdef DECLARE_WAITQUEUE
+  wait_queue_head_t  *sleep_wait_p = (wait_queue_head_t*)data;
+#else
+  struct wait_queue **sleep_wait_p = (struct wait_queue **)data;
+#endif
+  wake_up(sleep_wait_p);
+}
+
+
+/* Useful API */
+
+void schedule_usleep(unsigned long us)
+{
+  struct fast_timer t;
+#ifdef DECLARE_WAITQUEUE
+  wait_queue_head_t sleep_wait;
+  init_waitqueue_head(&sleep_wait);
+  {
+  DECLARE_WAITQUEUE(wait, current);
+#else
+  struct wait_queue *sleep_wait = NULL;
+  struct wait_queue wait = { current, NULL };
+#endif
+
+  D1(printk("schedule_usleep(%d)\n", us));
+  add_wait_queue(&sleep_wait, &wait);
+  set_current_state(TASK_INTERRUPTIBLE);
+  start_one_shot_timer(&t, wake_up_func, (unsigned long)&sleep_wait, us,
+                       "usleep");
+  schedule();
+  set_current_state(TASK_RUNNING);
+  remove_wait_queue(&sleep_wait, &wait);
+  D1(printk("done schedule_usleep(%d)\n", us));
+#ifdef DECLARE_WAITQUEUE
+  }
+#endif
+}
+
+#ifdef CONFIG_PROC_FS
+static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
+                       ,int *eof, void *data_unused
+#else
+                        ,int unused
+#endif
+                               );
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
+static struct proc_dir_entry *fasttimer_proc_entry;
+#else
+static struct proc_dir_entry fasttimer_proc_entry =
+{
+  0, 9, "fasttimer",
+  S_IFREG | S_IRUGO, 1, 0, 0,
+  0, NULL /* ops -- default to array */,
+  &proc_fasttimer_read /* get_info */,
+};
+#endif
+#endif /* CONFIG_PROC_FS */
+
+#ifdef CONFIG_PROC_FS
+
+/* This value is very much based on testing */
+#define BIG_BUF_SIZE (500 + NUM_TIMER_STATS * 300)
+
+static int proc_fasttimer_read(char *buf, char **start, off_t offset, int len
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
+                       ,int *eof, void *data_unused
+#else
+                        ,int unused
+#endif
+                               )
+{
+  unsigned long flags;
+  int i = 0;
+  int num_to_show;
+  struct timeval tv;
+  struct fast_timer *t, *nextt;
+  static char *bigbuf = NULL;
+  static unsigned long used;
+
+  if (!bigbuf && !(bigbuf = vmalloc(BIG_BUF_SIZE)))
+  {
+    used = 0;
+    bigbuf[0] = '\0';
+    return 0;
+  }
+
+  if (!offset || !used)
+  {
+    do_gettimeofday_fast(&tv);
+
+    used = 0;
+    used += sprintf(bigbuf + used, "Fast timers added:     %i\n",
+                    fast_timers_added);
+    used += sprintf(bigbuf + used, "Fast timers started:   %i\n",
+                    fast_timers_started);
+    used += sprintf(bigbuf + used, "Fast timer interrupts: %i\n",
+                    fast_timer_ints);
+    used += sprintf(bigbuf + used, "Fast timers expired:   %i\n",
+                    fast_timers_expired);
+    used += sprintf(bigbuf + used, "Fast timers deleted:   %i\n",
+                    fast_timers_deleted);
+    used += sprintf(bigbuf + used, "Fast timer running:    %s\n",
+                    fast_timer_running ? "yes" : "no");
+    used += sprintf(bigbuf + used, "Current time:          %lu.%06lu\n",
+                    (unsigned long)tv.tv_sec,
+                    (unsigned long)tv.tv_usec);
+#ifdef FAST_TIMER_SANITY_CHECKS
+    used += sprintf(bigbuf + used, "Sanity failed:         %i\n",
+                    sanity_failed);
+#endif
+    used += sprintf(bigbuf + used, "\n");
+
+#ifdef DEBUG_LOG_INCLUDED
+    {
+      int end_i = debug_log_cnt;
+      i = 0;
+
+      if (debug_log_cnt_wrapped)
+      {
+        i = debug_log_cnt;
+      }
+
+      while ((i != end_i || (debug_log_cnt_wrapped && !used)) &&
+             used+100 < BIG_BUF_SIZE)
+      {
+        used += sprintf(bigbuf + used, debug_log_string[i],
+                        debug_log_value[i]);
+        i = (i+1) % DEBUG_LOG_MAX;
+      }
+    }
+    used += sprintf(bigbuf + used, "\n");
+#endif
+
+    num_to_show = (fast_timers_started < NUM_TIMER_STATS ? fast_timers_started:
+                   NUM_TIMER_STATS);
+    used += sprintf(bigbuf + used, "Timers started: %i\n", fast_timers_started);
+    for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE) ; i++)
+    {
+      int cur = (fast_timers_started - i - 1) % NUM_TIMER_STATS;
+
+#if 1 //ndef FAST_TIMER_LOG
+      used += sprintf(bigbuf + used, "div: %i delay: %i"
+                      "\n",
+                      timer_div_settings[cur],
+                      timer_delay_settings[cur]
+                      );
+#endif
+#ifdef FAST_TIMER_LOG
+      t = &timer_started_log[cur];
+      used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
+                      "d: %6li us data: 0x%08lX"
+                      "\n",
+                      t->name,
+                      (unsigned long)t->tv_set.tv_sec,
+                      (unsigned long)t->tv_set.tv_usec,
+                      (unsigned long)t->tv_expires.tv_sec,
+                      (unsigned long)t->tv_expires.tv_usec,
+                      t->delay_us,
+                      t->data
+                      );
+#endif
+    }
+    used += sprintf(bigbuf + used, "\n");
+
+#ifdef FAST_TIMER_LOG
+    num_to_show = (fast_timers_added < NUM_TIMER_STATS ? fast_timers_added:
+                   NUM_TIMER_STATS);
+    used += sprintf(bigbuf + used, "Timers added: %i\n", fast_timers_added);
+    for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
+    {
+      t = &timer_added_log[(fast_timers_added - i - 1) % NUM_TIMER_STATS];
+      used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
+                      "d: %6li us data: 0x%08lX"
+                      "\n",
+                      t->name,
+                      (unsigned long)t->tv_set.tv_sec,
+                      (unsigned long)t->tv_set.tv_usec,
+                      (unsigned long)t->tv_expires.tv_sec,
+                      (unsigned long)t->tv_expires.tv_usec,
+                      t->delay_us,
+                      t->data
+                      );
+    }
+    used += sprintf(bigbuf + used, "\n");
+
+    num_to_show = (fast_timers_expired < NUM_TIMER_STATS ? fast_timers_expired:
+                   NUM_TIMER_STATS);
+    used += sprintf(bigbuf + used, "Timers expired: %i\n", fast_timers_expired);
+    for (i = 0; i < num_to_show && (used+100 < BIG_BUF_SIZE); i++)
+    {
+      t = &timer_expired_log[(fast_timers_expired - i - 1) % NUM_TIMER_STATS];
+      used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
+                      "d: %6li us data: 0x%08lX"
+                      "\n",
+                      t->name,
+                      (unsigned long)t->tv_set.tv_sec,
+                      (unsigned long)t->tv_set.tv_usec,
+                      (unsigned long)t->tv_expires.tv_sec,
+                      (unsigned long)t->tv_expires.tv_usec,
+                      t->delay_us,
+                      t->data
+                      );
+    }
+    used += sprintf(bigbuf + used, "\n");
+#endif
+
+    used += sprintf(bigbuf + used, "Active timers:\n");
+    local_irq_save(flags);
+    local_irq_save(flags);
+    t = fast_timer_list;
+    while (t != NULL && (used+100 < BIG_BUF_SIZE))
+    {
+      nextt = t->next;
+      local_irq_restore(flags);
+      used += sprintf(bigbuf + used, "%-14s s: %6lu.%06lu e: %6lu.%06lu "
+                      "d: %6li us data: 0x%08lX"
+/*                      " func: 0x%08lX" */
+                      "\n",
+                      t->name,
+                      (unsigned long)t->tv_set.tv_sec,
+                      (unsigned long)t->tv_set.tv_usec,
+                      (unsigned long)t->tv_expires.tv_sec,
+                      (unsigned long)t->tv_expires.tv_usec,
+                      t->delay_us,
+                      t->data
+/*                      , t->function */
+                      );
+      local_irq_disable();
+      if (t->next != nextt)
+      {
+        printk("timer removed!\n");
+      }
+      t = nextt;
+    }
+    local_irq_restore(flags);
+  }
+
+  if (used - offset < len)
+  {
+    len = used - offset;
+  }
+
+  memcpy(buf, bigbuf + offset, len);
+  *start = buf;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
+  *eof = 1;
+#endif
+
+  return len;
+}
+#endif /* PROC_FS */
+
+#ifdef FAST_TIMER_TEST
+static volatile unsigned long i = 0;
+static volatile int num_test_timeout = 0;
+static struct fast_timer tr[10];
+static int exp_num[10];
+
+static struct timeval tv_exp[100];
+
+static void test_timeout(unsigned long data)
+{
+  do_gettimeofday_fast(&tv_exp[data]);
+  exp_num[data] = num_test_timeout;
+
+  num_test_timeout++;
+}
+
+static void test_timeout1(unsigned long data)
+{
+  do_gettimeofday_fast(&tv_exp[data]);
+  exp_num[data] = num_test_timeout;
+  if (data < 7)
+  {
+    start_one_shot_timer(&tr[i], test_timeout1, i, 1000, "timeout1");
+    i++;
+  }
+  num_test_timeout++;
+}
+
+DP(
+static char buf0[2000];
+static char buf1[2000];
+static char buf2[2000];
+static char buf3[2000];
+static char buf4[2000];
+);
+
+static char buf5[6000];
+static int j_u[1000];
+
+static void fast_timer_test(void)
+{
+  int prev_num;
+  int j;
+
+  struct timeval tv, tv0, tv1, tv2;
+
+  printk("fast_timer_test() start\n");
+  do_gettimeofday_fast(&tv);
+
+  for (j = 0; j < 1000; j++)
+  {
+    j_u[j] = GET_JIFFIES_USEC();
+  }
+  for (j = 0; j < 100; j++)
+  {
+    do_gettimeofday_fast(&tv_exp[j]);
+  }
+  printk("fast_timer_test() %is %06i\n", tv.tv_sec, tv.tv_usec);
+
+  for (j = 0; j < 1000; j++)
+  {
+    printk("%i %i %i %i %i\n",j_u[j], j_u[j+1], j_u[j+2], j_u[j+3], j_u[j+4]);
+    j += 4;
+  }
+  for (j = 0; j < 100; j++)
+  {
+    printk("%i.%i %i.%i %i.%i %i.%i %i.%i\n",
+           tv_exp[j].tv_sec,tv_exp[j].tv_usec,
+           tv_exp[j+1].tv_sec,tv_exp[j+1].tv_usec,
+           tv_exp[j+2].tv_sec,tv_exp[j+2].tv_usec,
+           tv_exp[j+3].tv_sec,tv_exp[j+3].tv_usec,
+           tv_exp[j+4].tv_sec,tv_exp[j+4].tv_usec);
+    j += 4;
+  }
+  do_gettimeofday_fast(&tv0);
+  start_one_shot_timer(&tr[i], test_timeout, i, 50000, "test0");
+  DP(proc_fasttimer_read(buf0, NULL, 0, 0, 0));
+  i++;
+  start_one_shot_timer(&tr[i], test_timeout, i, 70000, "test1");
+  DP(proc_fasttimer_read(buf1, NULL, 0, 0, 0));
+  i++;
+  start_one_shot_timer(&tr[i], test_timeout, i, 40000, "test2");
+  DP(proc_fasttimer_read(buf2, NULL, 0, 0, 0));
+  i++;
+  start_one_shot_timer(&tr[i], test_timeout, i, 60000, "test3");
+  DP(proc_fasttimer_read(buf3, NULL, 0, 0, 0));
+  i++;
+  start_one_shot_timer(&tr[i], test_timeout1, i, 55000, "test4xx");
+  DP(proc_fasttimer_read(buf4, NULL, 0, 0, 0));
+  i++;
+  do_gettimeofday_fast(&tv1);
+
+  proc_fasttimer_read(buf5, NULL, 0, 0, 0);
+
+  prev_num = num_test_timeout;
+  while (num_test_timeout < i)
+  {
+    if (num_test_timeout != prev_num)
+    {
+      prev_num = num_test_timeout;
+    }
+  }
+  do_gettimeofday_fast(&tv2);
+  printk("Timers started    %is %06i\n", tv0.tv_sec, tv0.tv_usec);
+  printk("Timers started at %is %06i\n", tv1.tv_sec, tv1.tv_usec);
+  printk("Timers done       %is %06i\n", tv2.tv_sec, tv2.tv_usec);
+  DP(printk("buf0:\n");
+     printk(buf0);
+     printk("buf1:\n");
+     printk(buf1);
+     printk("buf2:\n");
+     printk(buf2);
+     printk("buf3:\n");
+     printk(buf3);
+     printk("buf4:\n");
+     printk(buf4);
+  );
+  printk("buf5:\n");
+  printk(buf5);
+
+  printk("timers set:\n");
+  for(j = 0; j<i; j++)
+  {
+    struct fast_timer *t = &tr[j];
+    printk("%-10s set: %6is %06ius exp: %6is %06ius "
+           "data: 0x%08X func: 0x%08X\n",
+           t->name,
+           t->tv_set.tv_sec,
+           t->tv_set.tv_usec,
+           t->tv_expires.tv_sec,
+           t->tv_expires.tv_usec,
+           t->data,
+           t->function
+           );
+
+    printk("           del: %6ius     did exp: %6is %06ius as #%i error: %6li\n",
+           t->delay_us,
+           tv_exp[j].tv_sec,
+           tv_exp[j].tv_usec,
+           exp_num[j],
+           (tv_exp[j].tv_sec - t->tv_expires.tv_sec)*1000000 + tv_exp[j].tv_usec - t->tv_expires.tv_usec);
+  }
+  proc_fasttimer_read(buf5, NULL, 0, 0, 0);
+  printk("buf5 after all done:\n");
+  printk(buf5);
+  printk("fast_timer_test() done\n");
+}
+#endif
+
+
+void fast_timer_init(void)
+{
+  /* For some reason, request_irq() hangs when called froom time_init() */
+  if (!fast_timer_is_init)
+  {
+    printk("fast_timer_init()\n");
+
+#ifdef CONFIG_PROC_FS
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
+   if ((fasttimer_proc_entry = create_proc_entry( "fasttimer", 0, 0 )))
+     fasttimer_proc_entry->read_proc = proc_fasttimer_read;
+#else
+    proc_register_dynamic(&proc_root, &fasttimer_proc_entry);
+#endif
+#endif /* PROC_FS */
+    if(request_irq(TIMER_INTR_VECT, timer_trig_interrupt, SA_INTERRUPT,
+                   "fast timer int", NULL))
+    {
+      printk("err: timer1 irq\n");
+    }
+    fast_timer_is_init = 1;
+#ifdef FAST_TIMER_TEST
+    printk("do test\n");
+    fast_timer_test();
+#endif
+  }
+}