Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Routines for Gravis UltraSound soundcards - Timers | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 <sound/driver.h> | |
25 | #include <linux/time.h> | |
26 | #include <sound/core.h> | |
27 | #include <sound/gus.h> | |
28 | ||
29 | /* | |
30 | * Timer 1 - 80us | |
31 | */ | |
32 | ||
5e2da206 | 33 | static int snd_gf1_timer1_start(struct snd_timer * timer) |
1da177e4 LT |
34 | { |
35 | unsigned long flags; | |
36 | unsigned char tmp; | |
37 | unsigned int ticks; | |
5e2da206 | 38 | struct snd_gus_card *gus; |
1da177e4 LT |
39 | |
40 | gus = snd_timer_chip(timer); | |
41 | spin_lock_irqsave(&gus->reg_lock, flags); | |
42 | ticks = timer->sticks; | |
43 | tmp = (gus->gf1.timer_enabled |= 4); | |
44 | snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_1, 256 - ticks); /* timer 1 count */ | |
45 | snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* enable timer 1 IRQ */ | |
46 | snd_gf1_adlib_write(gus, 0x04, tmp >> 2); /* timer 2 start */ | |
47 | spin_unlock_irqrestore(&gus->reg_lock, flags); | |
48 | return 0; | |
49 | } | |
50 | ||
5e2da206 | 51 | static int snd_gf1_timer1_stop(struct snd_timer * timer) |
1da177e4 LT |
52 | { |
53 | unsigned long flags; | |
54 | unsigned char tmp; | |
5e2da206 | 55 | struct snd_gus_card *gus; |
1da177e4 LT |
56 | |
57 | gus = snd_timer_chip(timer); | |
58 | spin_lock_irqsave(&gus->reg_lock, flags); | |
59 | tmp = (gus->gf1.timer_enabled &= ~4); | |
60 | snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* disable timer #1 */ | |
61 | spin_unlock_irqrestore(&gus->reg_lock, flags); | |
62 | return 0; | |
63 | } | |
64 | ||
65 | /* | |
66 | * Timer 2 - 320us | |
67 | */ | |
68 | ||
5e2da206 | 69 | static int snd_gf1_timer2_start(struct snd_timer * timer) |
1da177e4 LT |
70 | { |
71 | unsigned long flags; | |
72 | unsigned char tmp; | |
73 | unsigned int ticks; | |
5e2da206 | 74 | struct snd_gus_card *gus; |
1da177e4 LT |
75 | |
76 | gus = snd_timer_chip(timer); | |
77 | spin_lock_irqsave(&gus->reg_lock, flags); | |
78 | ticks = timer->sticks; | |
79 | tmp = (gus->gf1.timer_enabled |= 8); | |
80 | snd_gf1_write8(gus, SNDRV_GF1_GB_ADLIB_TIMER_2, 256 - ticks); /* timer 2 count */ | |
81 | snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* enable timer 2 IRQ */ | |
82 | snd_gf1_adlib_write(gus, 0x04, tmp >> 2); /* timer 2 start */ | |
83 | spin_unlock_irqrestore(&gus->reg_lock, flags); | |
84 | return 0; | |
85 | } | |
86 | ||
5e2da206 | 87 | static int snd_gf1_timer2_stop(struct snd_timer * timer) |
1da177e4 LT |
88 | { |
89 | unsigned long flags; | |
90 | unsigned char tmp; | |
5e2da206 | 91 | struct snd_gus_card *gus; |
1da177e4 LT |
92 | |
93 | gus = snd_timer_chip(timer); | |
94 | spin_lock_irqsave(&gus->reg_lock, flags); | |
95 | tmp = (gus->gf1.timer_enabled &= ~8); | |
96 | snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, tmp); /* disable timer #1 */ | |
97 | spin_unlock_irqrestore(&gus->reg_lock, flags); | |
98 | return 0; | |
99 | } | |
100 | ||
101 | /* | |
102 | ||
103 | */ | |
104 | ||
5e2da206 | 105 | static void snd_gf1_interrupt_timer1(struct snd_gus_card * gus) |
1da177e4 | 106 | { |
5e2da206 | 107 | struct snd_timer *timer = gus->gf1.timer1; |
1da177e4 LT |
108 | |
109 | if (timer == NULL) | |
110 | return; | |
111 | snd_timer_interrupt(timer, timer->sticks); | |
112 | } | |
113 | ||
5e2da206 | 114 | static void snd_gf1_interrupt_timer2(struct snd_gus_card * gus) |
1da177e4 | 115 | { |
5e2da206 | 116 | struct snd_timer *timer = gus->gf1.timer2; |
1da177e4 LT |
117 | |
118 | if (timer == NULL) | |
119 | return; | |
120 | snd_timer_interrupt(timer, timer->sticks); | |
121 | } | |
122 | ||
123 | /* | |
124 | ||
125 | */ | |
126 | ||
5e2da206 | 127 | static struct snd_timer_hardware snd_gf1_timer1 = |
1da177e4 LT |
128 | { |
129 | .flags = SNDRV_TIMER_HW_STOP, | |
130 | .resolution = 80000, | |
131 | .ticks = 256, | |
132 | .start = snd_gf1_timer1_start, | |
133 | .stop = snd_gf1_timer1_stop, | |
134 | }; | |
135 | ||
5e2da206 | 136 | static struct snd_timer_hardware snd_gf1_timer2 = |
1da177e4 LT |
137 | { |
138 | .flags = SNDRV_TIMER_HW_STOP, | |
139 | .resolution = 320000, | |
140 | .ticks = 256, | |
141 | .start = snd_gf1_timer2_start, | |
142 | .stop = snd_gf1_timer2_stop, | |
143 | }; | |
144 | ||
5e2da206 | 145 | static void snd_gf1_timer1_free(struct snd_timer *timer) |
1da177e4 | 146 | { |
5e2da206 | 147 | struct snd_gus_card *gus = timer->private_data; |
1da177e4 LT |
148 | gus->gf1.timer1 = NULL; |
149 | } | |
150 | ||
5e2da206 | 151 | static void snd_gf1_timer2_free(struct snd_timer *timer) |
1da177e4 | 152 | { |
5e2da206 | 153 | struct snd_gus_card *gus = timer->private_data; |
1da177e4 LT |
154 | gus->gf1.timer2 = NULL; |
155 | } | |
156 | ||
5e2da206 | 157 | void snd_gf1_timers_init(struct snd_gus_card * gus) |
1da177e4 | 158 | { |
5e2da206 TI |
159 | struct snd_timer *timer; |
160 | struct snd_timer_id tid; | |
1da177e4 LT |
161 | |
162 | if (gus->gf1.timer1 != NULL || gus->gf1.timer2 != NULL) | |
163 | return; | |
164 | ||
165 | gus->gf1.interrupt_handler_timer1 = snd_gf1_interrupt_timer1; | |
166 | gus->gf1.interrupt_handler_timer2 = snd_gf1_interrupt_timer2; | |
167 | ||
168 | tid.dev_class = SNDRV_TIMER_CLASS_CARD; | |
169 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; | |
170 | tid.card = gus->card->number; | |
171 | tid.device = gus->timer_dev; | |
172 | tid.subdevice = 0; | |
173 | ||
174 | if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) { | |
175 | strcpy(timer->name, "GF1 timer #1"); | |
176 | timer->private_data = gus; | |
177 | timer->private_free = snd_gf1_timer1_free; | |
178 | timer->hw = snd_gf1_timer1; | |
179 | } | |
180 | gus->gf1.timer1 = timer; | |
181 | ||
182 | tid.device++; | |
183 | ||
184 | if (snd_timer_new(gus->card, "GF1 timer", &tid, &timer) >= 0) { | |
185 | strcpy(timer->name, "GF1 timer #2"); | |
186 | timer->private_data = gus; | |
187 | timer->private_free = snd_gf1_timer2_free; | |
188 | timer->hw = snd_gf1_timer2; | |
189 | } | |
190 | gus->gf1.timer2 = timer; | |
191 | } | |
192 | ||
5e2da206 | 193 | void snd_gf1_timers_done(struct snd_gus_card * gus) |
1da177e4 LT |
194 | { |
195 | snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_TIMER1 | SNDRV_GF1_HANDLER_TIMER2); | |
196 | if (gus->gf1.timer1) { | |
197 | snd_device_free(gus->card, gus->gf1.timer1); | |
198 | gus->gf1.timer1 = NULL; | |
199 | } | |
200 | if (gus->gf1.timer2) { | |
201 | snd_device_free(gus->card, gus->gf1.timer2); | |
202 | gus->gf1.timer2 = NULL; | |
203 | } | |
204 | } |