Merge branches 'oprofile-v2' and 'timers/hpet' into x86/core-v4
[linux-2.6] / sound / isa / gus / gus_timer.c
1 /*
2  *  Routines for Gravis UltraSound soundcards - Timers
3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4  *
5  *  GUS have similar timers as AdLib (OPL2/OPL3 chips).
6  *
7  *
8  *   This program is free software; you can redistribute it and/or modify
9  *   it under the terms of the GNU General Public License as published by
10  *   the Free Software Foundation; either version 2 of the License, or
11  *   (at your option) any later version.
12  *
13  *   This program is distributed in the hope that it will be useful,
14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *   GNU General Public License for more details.
17  *
18  *   You should have received a copy of the GNU General Public License
19  *   along with this program; if not, write to the Free Software
20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
21  *
22  */
23
24 #include <linux/time.h>
25 #include <sound/core.h>
26 #include <sound/gus.h>
27
28 /*
29  *  Timer 1 - 80us
30  */
31
32 static int snd_gf1_timer1_start(struct snd_timer * timer)
33 {
34         unsigned long flags;
35         unsigned char tmp;
36         unsigned int ticks;
37         struct snd_gus_card *gus;
38
39         gus = snd_timer_chip(timer);
40         spin_lock_irqsave(&gus->reg_lock, flags);
41         ticks = timer->sticks;
42         tmp = (gus->gf1.timer_enabled |= 4);
43         snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_1, 256 - ticks);   /* timer 1 count */
44         snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp);   /* enable timer 1 IRQ */
45         snd_gf1_adlib_write(gus, 0x04, tmp >> 2);       /* timer 2 start */
46         spin_unlock_irqrestore(&gus->reg_lock, flags);
47         return 0;
48 }
49
50 static int snd_gf1_timer1_stop(struct snd_timer * timer)
51 {
52         unsigned long flags;
53         unsigned char tmp;
54         struct snd_gus_card *gus;
55
56         gus = snd_timer_chip(timer);
57         spin_lock_irqsave(&gus->reg_lock, flags);
58         tmp = (gus->gf1.timer_enabled &= ~4);
59         snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp);   /* disable timer #1 */
60         spin_unlock_irqrestore(&gus->reg_lock, flags);
61         return 0;
62 }
63
64 /*
65  *  Timer 2 - 320us
66  */
67
68 static int snd_gf1_timer2_start(struct snd_timer * timer)
69 {
70         unsigned long flags;
71         unsigned char tmp;
72         unsigned int ticks;
73         struct snd_gus_card *gus;
74
75         gus = snd_timer_chip(timer);
76         spin_lock_irqsave(&gus->reg_lock, flags);
77         ticks = timer->sticks;
78         tmp = (gus->gf1.timer_enabled |= 8);
79         snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_2, 256 - ticks);   /* timer 2 count */
80         snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp);   /* enable timer 2 IRQ */
81         snd_gf1_adlib_write(gus, 0x04, tmp >> 2);       /* timer 2 start */
82         spin_unlock_irqrestore(&gus->reg_lock, flags);
83         return 0;
84 }
85
86 static int snd_gf1_timer2_stop(struct snd_timer * timer)
87 {
88         unsigned long flags;
89         unsigned char tmp;
90         struct snd_gus_card *gus;
91
92         gus = snd_timer_chip(timer);
93         spin_lock_irqsave(&gus->reg_lock, flags);
94         tmp = (gus->gf1.timer_enabled &= ~8);
95         snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp);   /* disable timer #1 */
96         spin_unlock_irqrestore(&gus->reg_lock, flags);
97         return 0;
98 }
99
100 /*
101
102  */
103
104 static void snd_gf1_interrupt_timer1(struct snd_gus_card * gus)
105 {
106         struct snd_timer *timer = gus->gf1.timer1;
107
108         if (timer == NULL)
109                 return;
110         snd_timer_interrupt(timer, timer->sticks);
111 }
112
113 static void snd_gf1_interrupt_timer2(struct snd_gus_card * gus)
114 {
115         struct snd_timer *timer = gus->gf1.timer2;
116
117         if (timer == NULL)
118                 return;
119         snd_timer_interrupt(timer, timer->sticks);
120 }
121
122 /*
123
124  */
125
126 static struct snd_timer_hardware snd_gf1_timer1 =
127 {
128         .flags =        SNDRV_TIMER_HW_STOP,
129         .resolution =   80000,
130         .ticks =        256,
131         .start =        snd_gf1_timer1_start,
132         .stop =         snd_gf1_timer1_stop,
133 };
134
135 static struct snd_timer_hardware snd_gf1_timer2 =
136 {
137         .flags =        SNDRV_TIMER_HW_STOP,
138         .resolution =   320000,
139         .ticks =        256,
140         .start =        snd_gf1_timer2_start,
141         .stop =         snd_gf1_timer2_stop,
142 };
143
144 static void snd_gf1_timer1_free(struct snd_timer *timer)
145 {
146         struct snd_gus_card *gus = timer->private_data;
147         gus->gf1.timer1 = NULL;
148 }
149
150 static void snd_gf1_timer2_free(struct snd_timer *timer)
151 {
152         struct snd_gus_card *gus = timer->private_data;
153         gus->gf1.timer2 = NULL;
154 }
155
156 void snd_gf1_timers_init(struct snd_gus_card * gus)
157 {
158         struct snd_timer *timer;
159         struct snd_timer_id tid;
160
161         if (gus->gf1.timer1 != NULL || gus->gf1.timer2 != NULL)
162                 return;
163
164         gus->gf1.interrupt_handler_timer1 = snd_gf1_interrupt_timer1;
165         gus->gf1.interrupt_handler_timer2 = snd_gf1_interrupt_timer2;
166
167         tid.dev_class = SNDRV_TIMER_CLASS_CARD;
168         tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
169         tid.card = gus->card->number;
170         tid.device = gus->timer_dev;
171         tid.subdevice = 0;
172
173         if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) {
174                 strcpy(timer->name, "GF1 timer #1");
175                 timer->private_data = gus;
176                 timer->private_free = snd_gf1_timer1_free;
177                 timer->hw = snd_gf1_timer1;
178         }
179         gus->gf1.timer1 = timer;
180
181         tid.device++;
182
183         if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) {
184                 strcpy(timer->name, "GF1 timer #2");
185                 timer->private_data = gus;
186                 timer->private_free = snd_gf1_timer2_free;
187                 timer->hw = snd_gf1_timer2;
188         }
189         gus->gf1.timer2 = timer;
190 }
191
192 void snd_gf1_timers_done(struct snd_gus_card * gus)
193 {
194         snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_TIMER1 | SNDRV_GF1_HANDLER_TIMER2);
195         if (gus->gf1.timer1) {
196                 snd_device_free(gus->card, gus->gf1.timer1);
197                 gus->gf1.timer1 = NULL;
198         }
199         if (gus->gf1.timer2) {
200                 snd_device_free(gus->card, gus->gf1.timer2);
201                 gus->gf1.timer2 = NULL;
202         }
203 }