/* * sound/oss/sys_timer.c * * The default timer for the Level 2 sequencer interface * Uses the (1/HZ sec) timer of kernel. */ /* * Copyright (C) by Hannu Savolainen 1993-1997 * * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL) * Version 2 (June 1991). See the "COPYING" file distributed with this software * for more info. */ /* * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed) * Andrew Veliath : adapted tmr2ticks from level 1 sequencer (avoid overflow) */ #include #include "sound_config.h" static volatile int opened, tmr_running; static volatile unsigned int tmr_offs, tmr_ctr; static volatile unsigned long ticks_offs; static volatile int curr_tempo, curr_timebase; static volatile unsigned long curr_ticks; static volatile unsigned long next_event_time; static unsigned long prev_event_time; static void poll_def_tmr(unsigned long dummy); static DEFINE_SPINLOCK(lock); static DEFINE_TIMER(def_tmr, poll_def_tmr, 0, 0); static unsigned long tmr2ticks(int tmr_value) { /* * Convert timer ticks to MIDI ticks */ unsigned long tmp; unsigned long scale; /* tmr_value (ticks per sec) * 1000000 (usecs per sec) / HZ (ticks per sec) -=> usecs */ tmp = tmr_value * (1000000 / HZ); scale = (60 * 1000000) / (curr_tempo * curr_timebase); /* usecs per MIDI tick */ return (tmp + scale / 2) / scale; } static void poll_def_tmr(unsigned long dummy) { if (!opened) return; def_tmr.expires = (1) + jiffies; add_timer(&def_tmr); if (!tmr_running) return; spin_lock(&lock); tmr_ctr++; curr_ticks = ticks_offs + tmr2ticks(tmr_ctr); if (curr_ticks >= next_event_time) { next_event_time = (unsigned long) -1; sequencer_timer(0); } spin_unlock(&lock); } static void tmr_reset(void) { unsigned long flags; spin_lock_irqsave(&lock,flags); tmr_offs = 0; ticks_offs = 0; tmr_ctr = 0; next_event_time = (unsigned long) -1; prev_event_time = 0; curr_ticks = 0; spin_unlock_irqrestore(&lock,flags); } static int def_tmr_open(int dev, int mode) { if (opened) return -EBUSY; tmr_reset(); curr_tempo = 60; curr_timebase = 100; opened = 1; { def_tmr.expires = (1) + jiffies; add_timer(&def_tmr); } return 0; } static void def_tmr_close(int dev) { opened = tmr_running = 0; del_timer(&def_tmr); } static int def_tmr_event(int dev, unsigned char *event) { unsigned char cmd = event[1]; unsigned long parm = *(int *) &event[4]; switch (cmd) { case TMR_WAIT_REL: parm += prev_event_time; case TMR_WAIT_ABS: if (parm > 0) { long time; if (parm <= curr_ticks) /* It's the time */ return TIMER_NOT_ARMED; time = parm; next_event_time = prev_event_time = time; return TIMER_ARMED; } break; case TMR_START: tmr_reset(); tmr_running = 1; break; case TMR_STOP: tmr_running = 0; break; case TMR_CONTINUE: tmr_running = 1; break; case TMR_TEMPO: if (parm) { if (parm < 8) parm = 8; if (parm > 360) parm = 360; tmr_offs = tmr_ctr; ticks_offs += tmr2ticks(tmr_ctr); tmr_ctr = 0; curr_tempo = parm; } break; case TMR_ECHO: seq_copy_to_input(event, 8); break; default:; } return TIMER_NOT_ARMED; } static unsigned long def_tmr_get_time(int dev) { if (!opened) return 0; return curr_ticks; } /* same as sound_timer.c:timer_ioctl!? */ static int def_tmr_ioctl(int dev, unsigned int cmd, void __user *arg) { int __user *p = arg; int val; switch (cmd) { case SNDCTL_TMR_SOURCE: return __put_user(TMR_INTERNAL, p); case SNDCTL_TMR_START: tmr_reset(); tmr_running = 1; return 0; case SNDCTL_TMR_STOP: tmr_running = 0; return 0; case SNDCTL_TMR_CONTINUE: tmr_running = 1; return 0; case SNDCTL_TMR_TIMEBASE: if (__get_user(val, p)) return -EFAULT; if (val) { if (val < 1) val = 1; if (val > 1000) val = 1000; curr_timebase = val; } return __put_user(curr_timebase, p); case SNDCTL_TMR_TEMPO: if (__get_user(val, p)) return -EFAULT; if (val) { if (val < 8) val = 8; if (val > 250) val = 250; tmr_offs = tmr_ctr; ticks_offs += tmr2ticks(tmr_ctr); tmr_ctr = 0; curr_tempo = val; reprogram_timer(); } return __put_user(curr_tempo, p); case SNDCTL_SEQ_CTRLRATE: if (__get_user(val, p)) return -EFAULT; if (val != 0) /* Can't change */ return -EINVAL; val = ((curr_tempo * curr_timebase) + 30) / 60; return __put_user(val, p); case SNDCTL_SEQ_GETTIME: return __put_user(curr_ticks, p); case SNDCTL_TMR_METRONOME: /* NOP */ break; default:; } return -EINVAL; } static void def_tmr_arm(int dev, long time) { if (time < 0) time = curr_ticks + 1; else if (time <= curr_ticks) /* It's the time */ return; next_event_time = prev_event_time = time; return; } struct sound_timer_operations default_sound_timer = { .owner = THIS_MODULE, .info = {"System clock", 0}, .priority = 0, /* Priority */ .devlink = 0, /* Local device link */ .open = def_tmr_open, .close = def_tmr_close, .event = def_tmr_event, .get_time = def_tmr_get_time, .ioctl = def_tmr_ioctl, .arm_timer = def_tmr_arm }; >annotate.h5583logplain -rw-r--r--auxtrace.c47774logplain -rw-r--r--auxtrace.h22142logplain -rw-r--r--block-range.c6948logplain -rw-r--r--block-range.h1607logplain -rw-r--r--bpf-loader.c40787logplain -rw-r--r--bpf-loader.h6215logplain -rw-r--r--bpf-prologue.c11226logplain -rw-r--r--bpf-prologue.h847logplain -rw-r--r--build-id.c19054logplain -rw-r--r--build-id.h1859logplain d---------c++184logplain -rw-r--r--cache.h733logplain -rw-r--r--call-path.c2893logplain -rw-r--r--call-path.h2203logplain -rw-r--r--callchain.c29332logplain -rw-r--r--callchain.h7881logplain -rw-r--r--cgroup.c3195logplain -rw-r--r--cgroup.h359logplain -rw-r--r--cloexec.c1950logplain -rw-r--r--cloexec.h251logplain -rw-r--r--color.c4787logplain -rw-r--r--color.h1647logplain -rw-r--r--comm.c2239logplain -rw-r--r--comm.h561logplain -rw-r--r--config.c16262logplain -rw-r--r--config.h2113logplain -rw-r--r--counts.c1026logplain -rw-r--r--counts.h790logplain -rw-r--r--cpumap.c12627logplain -rw-r--r--cpumap.h1954logplain -rw-r--r--cs-etm.h2061logplain -rw-r--r--ctype.c2018logplain -rw-r--r--data-convert-bt.c36671logplain -rw-r--r--data-convert-bt.h302logplain -rw-r--r--data-convert.h141logplain -rw-r--r--data.c3459logplain -rw-r--r--data.h1369logplain -rw-r--r--db-export.c11434logplain -rw-r--r--db-export.h3816logplain -rw-r--r--debug.c4417logplain -rw-r--r--debug.h2023logplain -rw-r--r--demangle-java.c4219logplain -rw-r--r--demangle-java.h249logplain -rw-r--r--demangle-rust.c6602logplain -rw-r--r--demangle-rust.h170logplain -rw-r--r--drv_configs.c1834logplain -rw-r--r--drv_configs.h844logplain -rw-r--r--dso.c31994logplain -rw-r--r--dso.h10399logplain -rw-r--r--dwarf-aux.c33828logplain -rw-r--r--dwarf-aux.h5101logplain -rw-r--r--dwarf-regs.c1816logplain -rw-r--r--env.c1884logplain -rw-r--r--env.h1268logplain -rw-r--r--event.c36670logplain -rw-r--r--event.h15997logplain -rw-r--r--evlist.c47104logplain -rw-r--r--evlist.h12584logplain -rw-r--r--evsel.c63917logplain -rw-r--r--evsel.h13041logplain -rw-r--r--evsel_fprintf.c5831logplain -rw-r--r--find-vdso-map.c581logplain -rw-r--r--genelf.c11653logplain -rw-r--r--genelf.h1814logplain -rw-r--r--genelf_debug.c14374logplain -rwxr-xr-xgenerate-cmdlist.sh1141logplain -rw-r--r--group.h122logplain -rw-r--r--header.c73410logplain -rw-r--r--header.h4365logplain -rw-r--r--help-unknown-cmd.c3221logplain