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12#include <linux/sched.h>
13#include <linux/timer.h>
14
15#include <asm/macintosh.h>
16#include <asm/mac_asc.h>
17
18static int mac_asc_inited;
19
20
21
22static __u8 mac_asc_wave_tab[ 0x800 ];
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26
27
28static const signed char sine_data[] = {
29 0, 39, 75, 103, 121, 127, 121, 103, 75, 39,
30 0, -39, -75, -103, -121, -127, -121, -103, -75, -39
31};
32
33
34
35
36static volatile __u8* mac_asc_regs = ( void* )0x50F14000;
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39
40
41static unsigned long mac_asc_samplespersec = 11050;
42static int mac_bell_duration;
43static unsigned long mac_bell_phase;
44static unsigned long mac_bell_phasepersample;
45
46
47
48
49static void mac_init_asc( void );
50static void mac_nosound( unsigned long );
51static void mac_quadra_start_bell( unsigned int, unsigned int, unsigned int );
52static void mac_quadra_ring_bell( unsigned long );
53static void mac_av_start_bell( unsigned int, unsigned int, unsigned int );
54static void ( *mac_special_bell )( unsigned int, unsigned int, unsigned int );
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58
59static DEFINE_TIMER(mac_sound_timer, mac_nosound, 0, 0);
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64
65static void mac_init_asc( void )
66{
67 int i;
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75
76
77 switch ( macintosh_config->ident )
78 {
79 case MAC_MODEL_IIFX:
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83 mac_asc_regs = ( void* )0x50010000;
84 break;
85
86
87
88
89 case MAC_MODEL_Q630:
90 case MAC_MODEL_P475:
91 mac_special_bell = mac_quadra_start_bell;
92 mac_asc_samplespersec = 22150;
93 break;
94 case MAC_MODEL_C660:
95 case MAC_MODEL_Q840:
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122 mac_special_bell = mac_av_start_bell;
123 break;
124 case MAC_MODEL_Q650:
125 case MAC_MODEL_Q700:
126 case MAC_MODEL_Q800:
127 case MAC_MODEL_Q900:
128 case MAC_MODEL_Q950:
129
130
131
132 mac_special_bell = NULL;
133 break;
134 default:
135
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138 mac_special_bell = NULL;
139 break;
140 }
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143
144
145
146 for ( i = 0; i < 0x400; i++ )
147 {
148 mac_asc_wave_tab[ i ] = i / 4;
149 mac_asc_wave_tab[ i + 0x400 ] = 0xFF - i / 4;
150 }
151 mac_asc_inited = 1;
152}
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162
163void mac_mksound( unsigned int freq, unsigned int length )
164{
165 __u32 cfreq = ( freq << 5 ) / 468;
166 unsigned long flags;
167 int i;
168
169 if ( mac_special_bell == NULL )
170 {
171
172 return;
173 }
174
175 if ( !mac_asc_inited )
176 mac_init_asc();
177
178 if ( mac_special_bell )
179 {
180 mac_special_bell( freq, length, 128 );
181 return;
182 }
183
184 if ( freq < 20 || freq > 20000 || length == 0 )
185 {
186 mac_nosound( 0 );
187 return;
188 }
189
190 local_irq_save(flags);
191
192 del_timer( &mac_sound_timer );
193
194 for ( i = 0; i < 0x800; i++ )
195 mac_asc_regs[ i ] = 0;
196 for ( i = 0; i < 0x800; i++ )
197 mac_asc_regs[ i ] = mac_asc_wave_tab[ i ];
198
199 for ( i = 0; i < 8; i++ )
200 *( __u32* )( ( __u32 )mac_asc_regs + ASC_CONTROL + 0x814 + 8 * i ) = cfreq;
201
202 mac_asc_regs[ 0x807 ] = 0;
203 mac_asc_regs[ ASC_VOLUME ] = 128;
204 mac_asc_regs[ 0x805 ] = 0;
205 mac_asc_regs[ 0x80F ] = 0;
206 mac_asc_regs[ ASC_MODE ] = ASC_MODE_SAMPLE;
207 mac_asc_regs[ ASC_ENABLE ] = ASC_ENABLE_SAMPLE;
208
209 mac_sound_timer.expires = jiffies + length;
210 add_timer( &mac_sound_timer );
211
212 local_irq_restore(flags);
213}
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216
217
218static void mac_nosound( unsigned long ignored )
219{
220 mac_asc_regs[ ASC_ENABLE ] = 0;
221}
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225
226static void mac_quadra_start_bell( unsigned int freq, unsigned int length, unsigned int volume )
227{
228 unsigned long flags;
229
230
231 if ( mac_bell_duration > 0 )
232 {
233 mac_bell_duration += length;
234 return;
235 }
236
237 mac_bell_duration = length;
238 mac_bell_phase = 0;
239 mac_bell_phasepersample = ( freq * sizeof( mac_asc_wave_tab ) ) / mac_asc_samplespersec;
240
241
242 local_irq_save(flags);
243
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245 mac_asc_regs[ 0x806 ] = volume;
246
247
248 if ( mac_asc_regs[ 0x801 ] != 1 )
249 {
250
251 mac_asc_regs[ 0x807 ] = 0;
252
253 mac_asc_regs[ 0x802 ] = 0;
254
255 mac_asc_regs[ 0x801 ] = 1;
256 mac_asc_regs[ 0x803 ] |= 0x80;
257 mac_asc_regs[ 0x803 ] &= 0x7F;
258 }
259
260 mac_sound_timer.function = mac_quadra_ring_bell;
261 mac_sound_timer.expires = jiffies + 1;
262 add_timer( &mac_sound_timer );
263
264 local_irq_restore(flags);
265}
266
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271
272static void mac_quadra_ring_bell( unsigned long ignored )
273{
274 int i, count = mac_asc_samplespersec / HZ;
275 unsigned long flags;
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284 local_irq_save(flags);
285
286 del_timer( &mac_sound_timer );
287
288 if ( mac_bell_duration-- > 0 )
289 {
290 for ( i = 0; i < count; i++ )
291 {
292 mac_bell_phase += mac_bell_phasepersample;
293 mac_asc_regs[ 0 ] = mac_asc_wave_tab[ mac_bell_phase & ( sizeof( mac_asc_wave_tab ) - 1 ) ];
294 }
295 mac_sound_timer.expires = jiffies + 1;
296 add_timer( &mac_sound_timer );
297 }
298 else
299 mac_asc_regs[ 0x801 ] = 0;
300
301 local_irq_restore(flags);
302}
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306
307static void mac_av_start_bell( unsigned int freq, unsigned int length, unsigned int volume )
308{
309}
310