1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  Routines for Gravis UltraSound soundcards - Timers
14  *  Timer 1 - 80us
17 static int snd_gf1_timer1_start(struct snd_timer * timer)  in snd_gf1_timer1_start()  argument
24 	gus = snd_timer_chip(timer);  in snd_gf1_timer1_start()
25 	spin_lock_irqsave(&gus->reg_lock, flags);  in snd_gf1_timer1_start()
26 	ticks = timer->sticks;  in snd_gf1_timer1_start()
27 	tmp = (gus->gf1.timer_enabled |= 4);  in snd_gf1_timer1_start()
28 	snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_1, 256 - ticks);	/* timer 1 count */  in snd_gf1_timer1_start()
29 	snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp);	/* enable timer 1 IRQ */  in snd_gf1_timer1_start()
30 	snd_gf1_adlib_write(gus, 0x04, tmp >> 2);	/* timer 2 start */  in snd_gf1_timer1_start()
31 	spin_unlock_irqrestore(&gus->reg_lock, flags);  in snd_gf1_timer1_start()
35 static int snd_gf1_timer1_stop(struct snd_timer * timer)  in snd_gf1_timer1_stop()  argument
41 	gus = snd_timer_chip(timer);  in snd_gf1_timer1_stop()
42 	spin_lock_irqsave(&gus->reg_lock, flags);  in snd_gf1_timer1_stop()
43 	tmp = (gus->gf1.timer_enabled &= ~4);  in snd_gf1_timer1_stop()
44 	snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp);	/* disable timer #1 */  in snd_gf1_timer1_stop()
45 	spin_unlock_irqrestore(&gus->reg_lock, flags);  in snd_gf1_timer1_stop()
50  *  Timer 2 - 320us
53 static int snd_gf1_timer2_start(struct snd_timer * timer)  in snd_gf1_timer2_start()  argument
60 	gus = snd_timer_chip(timer);  in snd_gf1_timer2_start()
61 	spin_lock_irqsave(&gus->reg_lock, flags);  in snd_gf1_timer2_start()
62 	ticks = timer->sticks;  in snd_gf1_timer2_start()
63 	tmp = (gus->gf1.timer_enabled |= 8);  in snd_gf1_timer2_start()
64 	snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_2, 256 - ticks);	/* timer 2 count */  in snd_gf1_timer2_start()
65 	snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp);	/* enable timer 2 IRQ */  in snd_gf1_timer2_start()
66 	snd_gf1_adlib_write(gus, 0x04, tmp >> 2);	/* timer 2 start */  in snd_gf1_timer2_start()
67 	spin_unlock_irqrestore(&gus->reg_lock, flags);  in snd_gf1_timer2_start()
71 static int snd_gf1_timer2_stop(struct snd_timer * timer)  in snd_gf1_timer2_stop()  argument
77 	gus = snd_timer_chip(timer);  in snd_gf1_timer2_stop()
78 	spin_lock_irqsave(&gus->reg_lock, flags);  in snd_gf1_timer2_stop()
79 	tmp = (gus->gf1.timer_enabled &= ~8);  in snd_gf1_timer2_stop()
80 	snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp);	/* disable timer #1 */  in snd_gf1_timer2_stop()
81 	spin_unlock_irqrestore(&gus->reg_lock, flags);  in snd_gf1_timer2_stop()
91 	struct snd_timer *timer = gus->gf1.timer1;  in snd_gf1_interrupt_timer1()  local
93 	if (timer == NULL)  in snd_gf1_interrupt_timer1()
95 	snd_timer_interrupt(timer, timer->sticks);  in snd_gf1_interrupt_timer1()
100 	struct snd_timer *timer = gus->gf1.timer2;  in snd_gf1_interrupt_timer2()  local
102 	if (timer == NULL)  in snd_gf1_interrupt_timer2()
104 	snd_timer_interrupt(timer, timer->sticks);  in snd_gf1_interrupt_timer2()
129 static void snd_gf1_timer1_free(struct snd_timer *timer)  in snd_gf1_timer1_free()  argument
131 	struct snd_gus_card *gus = timer->private_data;  in snd_gf1_timer1_free()
132 	gus->gf1.timer1 = NULL;  in snd_gf1_timer1_free()
135 static void snd_gf1_timer2_free(struct snd_timer *timer)  in snd_gf1_timer2_free()  argument
137 	struct snd_gus_card *gus = timer->private_data;  in snd_gf1_timer2_free()
138 	gus->gf1.timer2 = NULL;  in snd_gf1_timer2_free()
143 	struct snd_timer *timer;  in snd_gf1_timers_init()  local
146 	if (gus->gf1.timer1 != NULL || gus->gf1.timer2 != NULL)  in snd_gf1_timers_init()
149 	gus->gf1.interrupt_handler_timer1 = snd_gf1_interrupt_timer1;  in snd_gf1_timers_init()
150 	gus->gf1.interrupt_handler_timer2 = snd_gf1_interrupt_timer2;  in snd_gf1_timers_init()
154 	tid.card = gus->card->number;  in snd_gf1_timers_init()
155 	tid.device = gus->timer_dev;  in snd_gf1_timers_init()
158 	if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) {  in snd_gf1_timers_init()
159 		strcpy(timer->name, "GF1 timer #1");  in snd_gf1_timers_init()
160 		timer->private_data = gus;  in snd_gf1_timers_init()
161 		timer->private_free = snd_gf1_timer1_free;  in snd_gf1_timers_init()
162 		timer->hw = snd_gf1_timer1;  in snd_gf1_timers_init()
164 	gus->gf1.timer1 = timer;  in snd_gf1_timers_init()
168 	if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) {  in snd_gf1_timers_init()
169 		strcpy(timer->name, "GF1 timer #2");  in snd_gf1_timers_init()
170 		timer->private_data = gus;  in snd_gf1_timers_init()
171 		timer->private_free = snd_gf1_timer2_free;  in snd_gf1_timers_init()
172 		timer->hw = snd_gf1_timer2;  in snd_gf1_timers_init()
174 	gus->gf1.timer2 = timer;  in snd_gf1_timers_init()
180 	if (gus->gf1.timer1) {  in snd_gf1_timers_done()
181 		snd_device_free(gus->card, gus->gf1.timer1);  in snd_gf1_timers_done()
182 		gus->gf1.timer1 = NULL;  in snd_gf1_timers_done()
184 	if (gus->gf1.timer2) {  in snd_gf1_timers_done()
185 		snd_device_free(gus->card, gus->gf1.timer2);  in snd_gf1_timers_done()
186 		gus->gf1.timer2 = NULL;  in snd_gf1_timers_done()