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Diffstat (limited to 'sound/isa/gus/gus_timer.c')
-rw-r--r--sound/isa/gus/gus_timer.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/sound/isa/gus/gus_timer.c b/sound/isa/gus/gus_timer.c
new file mode 100644
index 000000000000..9876603ff6c1
--- /dev/null
+++ b/sound/isa/gus/gus_timer.c
@@ -0,0 +1,204 @@
+/*
+ * Routines for Gravis UltraSound soundcards - Timers
+ * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ *
+ * GUS have similar timers as AdLib (OPL2/OPL3 chips).
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <sound/driver.h>
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/gus.h>
+
+/*
+ * Timer 1 - 80us
+ */
+
+static int snd_gf1_timer1_start(snd_timer_t * timer)
+{
+ unsigned long flags;
+ unsigned char tmp;
+ unsigned int ticks;
+ snd_gus_card_t *gus;
+
+ gus = snd_timer_chip(timer);
+ spin_lock_irqsave(&gus->reg_lock, flags);
+ ticks = timer->sticks;
+ tmp = (gus->gf1.timer_enabled |= 4);
+ snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_1, 256 - ticks); /* timer 1 count */
+ snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* enable timer 1 IRQ */
+ snd_gf1_adlib_write(gus, 0x04, tmp >> 2); /* timer 2 start */
+ spin_unlock_irqrestore(&gus->reg_lock, flags);
+ return 0;
+}
+
+static int snd_gf1_timer1_stop(snd_timer_t * timer)
+{
+ unsigned long flags;
+ unsigned char tmp;
+ snd_gus_card_t *gus;
+
+ gus = snd_timer_chip(timer);
+ spin_lock_irqsave(&gus->reg_lock, flags);
+ tmp = (gus->gf1.timer_enabled &= ~4);
+ snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* disable timer #1 */
+ spin_unlock_irqrestore(&gus->reg_lock, flags);
+ return 0;
+}
+
+/*
+ * Timer 2 - 320us
+ */
+
+static int snd_gf1_timer2_start(snd_timer_t * timer)
+{
+ unsigned long flags;
+ unsigned char tmp;
+ unsigned int ticks;
+ snd_gus_card_t *gus;
+
+ gus = snd_timer_chip(timer);
+ spin_lock_irqsave(&gus->reg_lock, flags);
+ ticks = timer->sticks;
+ tmp = (gus->gf1.timer_enabled |= 8);
+ snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_2, 256 - ticks); /* timer 2 count */
+ snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* enable timer 2 IRQ */
+ snd_gf1_adlib_write(gus, 0x04, tmp >> 2); /* timer 2 start */
+ spin_unlock_irqrestore(&gus->reg_lock, flags);
+ return 0;
+}
+
+static int snd_gf1_timer2_stop(snd_timer_t * timer)
+{
+ unsigned long flags;
+ unsigned char tmp;
+ snd_gus_card_t *gus;
+
+ gus = snd_timer_chip(timer);
+ spin_lock_irqsave(&gus->reg_lock, flags);
+ tmp = (gus->gf1.timer_enabled &= ~8);
+ snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* disable timer #1 */
+ spin_unlock_irqrestore(&gus->reg_lock, flags);
+ return 0;
+}
+
+/*
+
+ */
+
+static void snd_gf1_interrupt_timer1(snd_gus_card_t * gus)
+{
+ snd_timer_t *timer = gus->gf1.timer1;
+
+ if (timer == NULL)
+ return;
+ snd_timer_interrupt(timer, timer->sticks);
+}
+
+static void snd_gf1_interrupt_timer2(snd_gus_card_t * gus)
+{
+ snd_timer_t *timer = gus->gf1.timer2;
+
+ if (timer == NULL)
+ return;
+ snd_timer_interrupt(timer, timer->sticks);
+}
+
+/*
+
+ */
+
+static struct _snd_timer_hardware snd_gf1_timer1 =
+{
+ .flags = SNDRV_TIMER_HW_STOP,
+ .resolution = 80000,
+ .ticks = 256,
+ .start = snd_gf1_timer1_start,
+ .stop = snd_gf1_timer1_stop,
+};
+
+static struct _snd_timer_hardware snd_gf1_timer2 =
+{
+ .flags = SNDRV_TIMER_HW_STOP,
+ .resolution = 320000,
+ .ticks = 256,
+ .start = snd_gf1_timer2_start,
+ .stop = snd_gf1_timer2_stop,
+};
+
+static void snd_gf1_timer1_free(snd_timer_t *timer)
+{
+ snd_gus_card_t *gus = timer->private_data;
+ gus->gf1.timer1 = NULL;
+}
+
+static void snd_gf1_timer2_free(snd_timer_t *timer)
+{
+ snd_gus_card_t *gus = timer->private_data;
+ gus->gf1.timer2 = NULL;
+}
+
+void snd_gf1_timers_init(snd_gus_card_t * gus)
+{
+ snd_timer_t *timer;
+ snd_timer_id_t tid;
+
+ if (gus->gf1.timer1 != NULL || gus->gf1.timer2 != NULL)
+ return;
+
+ gus->gf1.interrupt_handler_timer1 = snd_gf1_interrupt_timer1;
+ gus->gf1.interrupt_handler_timer2 = snd_gf1_interrupt_timer2;
+
+ tid.dev_class = SNDRV_TIMER_CLASS_CARD;
+ tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
+ tid.card = gus->card->number;
+ tid.device = gus->timer_dev;
+ tid.subdevice = 0;
+
+ if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) {
+ strcpy(timer->name, "GF1 timer #1");
+ timer->private_data = gus;
+ timer->private_free = snd_gf1_timer1_free;
+ timer->hw = snd_gf1_timer1;
+ }
+ gus->gf1.timer1 = timer;
+
+ tid.device++;
+
+ if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) {
+ strcpy(timer->name, "GF1 timer #2");
+ timer->private_data = gus;
+ timer->private_free = snd_gf1_timer2_free;
+ timer->hw = snd_gf1_timer2;
+ }
+ gus->gf1.timer2 = timer;
+}
+
+void snd_gf1_timers_done(snd_gus_card_t * gus)
+{
+ snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_TIMER1 | SNDRV_GF1_HANDLER_TIMER2);
+ if (gus->gf1.timer1) {
+ snd_device_free(gus->card, gus->gf1.timer1);
+ gus->gf1.timer1 = NULL;
+ }
+ if (gus->gf1.timer2) {
+ snd_device_free(gus->card, gus->gf1.timer2);
+ gus->gf1.timer2 = NULL;
+ }
+}