1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 */
5
6 #include <linux/delay.h>
7 #include <linux/interrupt.h>
8 #include <linux/time.h>
9 #include <sound/core.h>
10 #include <sound/gus.h>
11
12 extern int snd_gf1_synth_init(struct snd_gus_card * gus);
13 extern void snd_gf1_synth_done(struct snd_gus_card * gus);
14
15 /*
16 * ok.. default interrupt handlers...
17 */
18
snd_gf1_default_interrupt_handler_midi_out(struct snd_gus_card * gus)19 static void snd_gf1_default_interrupt_handler_midi_out(struct snd_gus_card * gus)
20 {
21 snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd &= ~0x20);
22 }
23
snd_gf1_default_interrupt_handler_midi_in(struct snd_gus_card * gus)24 static void snd_gf1_default_interrupt_handler_midi_in(struct snd_gus_card * gus)
25 {
26 snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd &= ~0x80);
27 }
28
snd_gf1_default_interrupt_handler_timer1(struct snd_gus_card * gus)29 static void snd_gf1_default_interrupt_handler_timer1(struct snd_gus_card * gus)
30 {
31 snd_gf1_i_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, gus->gf1.timer_enabled &= ~4);
32 }
33
snd_gf1_default_interrupt_handler_timer2(struct snd_gus_card * gus)34 static void snd_gf1_default_interrupt_handler_timer2(struct snd_gus_card * gus)
35 {
36 snd_gf1_i_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, gus->gf1.timer_enabled &= ~8);
37 }
38
snd_gf1_default_interrupt_handler_wave_and_volume(struct snd_gus_card * gus,struct snd_gus_voice * voice)39 static void snd_gf1_default_interrupt_handler_wave_and_volume(struct snd_gus_card * gus, struct snd_gus_voice * voice)
40 {
41 snd_gf1_i_ctrl_stop(gus, 0x00);
42 snd_gf1_i_ctrl_stop(gus, 0x0d);
43 }
44
snd_gf1_default_interrupt_handler_dma_write(struct snd_gus_card * gus)45 static void snd_gf1_default_interrupt_handler_dma_write(struct snd_gus_card * gus)
46 {
47 snd_gf1_i_write8(gus, 0x41, 0x00);
48 }
49
snd_gf1_default_interrupt_handler_dma_read(struct snd_gus_card * gus)50 static void snd_gf1_default_interrupt_handler_dma_read(struct snd_gus_card * gus)
51 {
52 snd_gf1_i_write8(gus, 0x49, 0x00);
53 }
54
snd_gf1_set_default_handlers(struct snd_gus_card * gus,unsigned int what)55 void snd_gf1_set_default_handlers(struct snd_gus_card * gus, unsigned int what)
56 {
57 if (what & SNDRV_GF1_HANDLER_MIDI_OUT)
58 gus->gf1.interrupt_handler_midi_out = snd_gf1_default_interrupt_handler_midi_out;
59 if (what & SNDRV_GF1_HANDLER_MIDI_IN)
60 gus->gf1.interrupt_handler_midi_in = snd_gf1_default_interrupt_handler_midi_in;
61 if (what & SNDRV_GF1_HANDLER_TIMER1)
62 gus->gf1.interrupt_handler_timer1 = snd_gf1_default_interrupt_handler_timer1;
63 if (what & SNDRV_GF1_HANDLER_TIMER2)
64 gus->gf1.interrupt_handler_timer2 = snd_gf1_default_interrupt_handler_timer2;
65 if (what & SNDRV_GF1_HANDLER_VOICE) {
66 struct snd_gus_voice *voice;
67
68 voice = &gus->gf1.voices[what & 0xffff];
69 voice->handler_wave =
70 voice->handler_volume = snd_gf1_default_interrupt_handler_wave_and_volume;
71 voice->handler_effect = NULL;
72 voice->volume_change = NULL;
73 }
74 if (what & SNDRV_GF1_HANDLER_DMA_WRITE)
75 gus->gf1.interrupt_handler_dma_write = snd_gf1_default_interrupt_handler_dma_write;
76 if (what & SNDRV_GF1_HANDLER_DMA_READ)
77 gus->gf1.interrupt_handler_dma_read = snd_gf1_default_interrupt_handler_dma_read;
78 }
79
80 /*
81
82 */
83
snd_gf1_clear_regs(struct snd_gus_card * gus)84 static void snd_gf1_clear_regs(struct snd_gus_card * gus)
85 {
86 unsigned long flags;
87
88 spin_lock_irqsave(&gus->reg_lock, flags);
89 inb(GUSP(gus, IRQSTAT));
90 snd_gf1_write8(gus, 0x41, 0); /* DRAM DMA Control Register */
91 snd_gf1_write8(gus, 0x45, 0); /* Timer Control */
92 snd_gf1_write8(gus, 0x49, 0); /* Sampling Control Register */
93 spin_unlock_irqrestore(&gus->reg_lock, flags);
94 }
95
snd_gf1_look_regs(struct snd_gus_card * gus)96 static void snd_gf1_look_regs(struct snd_gus_card * gus)
97 {
98 unsigned long flags;
99
100 spin_lock_irqsave(&gus->reg_lock, flags);
101 snd_gf1_look8(gus, 0x41); /* DRAM DMA Control Register */
102 snd_gf1_look8(gus, 0x49); /* Sampling Control Register */
103 inb(GUSP(gus, IRQSTAT));
104 snd_gf1_read8(gus, 0x0f); /* IRQ Source Register */
105 spin_unlock_irqrestore(&gus->reg_lock, flags);
106 }
107
108 /*
109 * put selected GF1 voices to initial stage...
110 */
111
snd_gf1_smart_stop_voice(struct snd_gus_card * gus,unsigned short voice)112 void snd_gf1_smart_stop_voice(struct snd_gus_card * gus, unsigned short voice)
113 {
114 unsigned long flags;
115
116 spin_lock_irqsave(&gus->reg_lock, flags);
117 snd_gf1_select_voice(gus, voice);
118 #if 0
119 dev_dbg(gus->card->dev,
120 " -%i- smart stop voice - volume = 0x%x\n",
121 voice, snd_gf1_i_read16(gus, SNDRV_GF1_VW_VOLUME));
122 #endif
123 snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
124 snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
125 spin_unlock_irqrestore(&gus->reg_lock, flags);
126 }
127
snd_gf1_stop_voice(struct snd_gus_card * gus,unsigned short voice)128 void snd_gf1_stop_voice(struct snd_gus_card * gus, unsigned short voice)
129 {
130 unsigned long flags;
131
132 spin_lock_irqsave(&gus->reg_lock, flags);
133 snd_gf1_select_voice(gus, voice);
134 #if 0
135 dev_dbg(gus->card->dev,
136 " -%i- stop voice - volume = 0x%x\n",
137 voice, snd_gf1_i_read16(gus, SNDRV_GF1_VW_VOLUME));
138 #endif
139 snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
140 snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
141 if (gus->gf1.enh_mode)
142 snd_gf1_write8(gus, SNDRV_GF1_VB_ACCUMULATOR, 0);
143 spin_unlock_irqrestore(&gus->reg_lock, flags);
144 }
145
snd_gf1_clear_voices(struct snd_gus_card * gus,unsigned short v_min,unsigned short v_max)146 static void snd_gf1_clear_voices(struct snd_gus_card * gus, unsigned short v_min,
147 unsigned short v_max)
148 {
149 unsigned long flags;
150 unsigned int daddr;
151 unsigned short i, w_16;
152
153 daddr = gus->gf1.default_voice_address << 4;
154 for (i = v_min; i <= v_max; i++) {
155 #if 0
156 if (gus->gf1.syn_voices)
157 gus->gf1.syn_voices[i].flags = ~VFLG_DYNAMIC;
158 #endif
159 spin_lock_irqsave(&gus->reg_lock, flags);
160 snd_gf1_select_voice(gus, i);
161 snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); /* Voice Control Register = voice stop */
162 snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); /* Volume Ramp Control Register = ramp off */
163 if (gus->gf1.enh_mode)
164 snd_gf1_write8(gus, SNDRV_GF1_VB_MODE, gus->gf1.memory ? 0x02 : 0x82); /* Deactivate voice */
165 w_16 = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL) & 0x04;
166 snd_gf1_write16(gus, SNDRV_GF1_VW_FREQUENCY, 0x400);
167 snd_gf1_write_addr(gus, SNDRV_GF1_VA_START, daddr, w_16);
168 snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, daddr, w_16);
169 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, 0);
170 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, 0);
171 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 0);
172 snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, 0);
173 snd_gf1_write_addr(gus, SNDRV_GF1_VA_CURRENT, daddr, w_16);
174 snd_gf1_write8(gus, SNDRV_GF1_VB_PAN, 7);
175 if (gus->gf1.enh_mode) {
176 snd_gf1_write8(gus, SNDRV_GF1_VB_ACCUMULATOR, 0);
177 snd_gf1_write16(gus, SNDRV_GF1_VW_EFFECT_VOLUME, 0);
178 snd_gf1_write16(gus, SNDRV_GF1_VW_EFFECT_VOLUME_FINAL, 0);
179 }
180 spin_unlock_irqrestore(&gus->reg_lock, flags);
181 }
182 }
183
snd_gf1_stop_voices(struct snd_gus_card * gus,unsigned short v_min,unsigned short v_max)184 void snd_gf1_stop_voices(struct snd_gus_card * gus, unsigned short v_min, unsigned short v_max)
185 {
186 unsigned long flags;
187 short i, ramp_ok;
188 unsigned short ramp_end;
189
190 if (!in_interrupt()) { /* this can't be done in interrupt */
191 for (i = v_min, ramp_ok = 0; i <= v_max; i++) {
192 spin_lock_irqsave(&gus->reg_lock, flags);
193 snd_gf1_select_voice(gus, i);
194 ramp_end = snd_gf1_read16(gus, 9) >> 8;
195 if (ramp_end > SNDRV_GF1_MIN_OFFSET) {
196 ramp_ok++;
197 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 20); /* ramp rate */
198 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, SNDRV_GF1_MIN_OFFSET); /* ramp start */
199 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, ramp_end); /* ramp end */
200 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, 0x40); /* ramp down */
201 if (gus->gf1.enh_mode) {
202 snd_gf1_delay(gus);
203 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, 0x40);
204 }
205 }
206 spin_unlock_irqrestore(&gus->reg_lock, flags);
207 }
208 msleep_interruptible(50);
209 }
210 snd_gf1_clear_voices(gus, v_min, v_max);
211 }
212
snd_gf1_alloc_voice_use(struct snd_gus_card * gus,struct snd_gus_voice * pvoice,int type,int client,int port)213 static void snd_gf1_alloc_voice_use(struct snd_gus_card * gus,
214 struct snd_gus_voice * pvoice,
215 int type, int client, int port)
216 {
217 pvoice->use = 1;
218 switch (type) {
219 case SNDRV_GF1_VOICE_TYPE_PCM:
220 gus->gf1.pcm_alloc_voices++;
221 pvoice->pcm = 1;
222 break;
223 case SNDRV_GF1_VOICE_TYPE_SYNTH:
224 pvoice->synth = 1;
225 pvoice->client = client;
226 pvoice->port = port;
227 break;
228 case SNDRV_GF1_VOICE_TYPE_MIDI:
229 pvoice->midi = 1;
230 pvoice->client = client;
231 pvoice->port = port;
232 break;
233 }
234 }
235
snd_gf1_alloc_voice(struct snd_gus_card * gus,int type,int client,int port)236 struct snd_gus_voice *snd_gf1_alloc_voice(struct snd_gus_card * gus, int type, int client, int port)
237 {
238 struct snd_gus_voice *pvoice;
239 unsigned long flags;
240 int idx;
241
242 spin_lock_irqsave(&gus->voice_alloc, flags);
243 if (type == SNDRV_GF1_VOICE_TYPE_PCM) {
244 if (gus->gf1.pcm_alloc_voices >= gus->gf1.pcm_channels) {
245 spin_unlock_irqrestore(&gus->voice_alloc, flags);
246 return NULL;
247 }
248 }
249 for (idx = 0; idx < 32; idx++) {
250 pvoice = &gus->gf1.voices[idx];
251 if (!pvoice->use) {
252 snd_gf1_alloc_voice_use(gus, pvoice, type, client, port);
253 spin_unlock_irqrestore(&gus->voice_alloc, flags);
254 return pvoice;
255 }
256 }
257 for (idx = 0; idx < 32; idx++) {
258 pvoice = &gus->gf1.voices[idx];
259 if (pvoice->midi && !pvoice->client) {
260 snd_gf1_clear_voices(gus, pvoice->number, pvoice->number);
261 snd_gf1_alloc_voice_use(gus, pvoice, type, client, port);
262 spin_unlock_irqrestore(&gus->voice_alloc, flags);
263 return pvoice;
264 }
265 }
266 spin_unlock_irqrestore(&gus->voice_alloc, flags);
267 return NULL;
268 }
269
snd_gf1_free_voice(struct snd_gus_card * gus,struct snd_gus_voice * voice)270 void snd_gf1_free_voice(struct snd_gus_card * gus, struct snd_gus_voice *voice)
271 {
272 unsigned long flags;
273 void (*private_free)(struct snd_gus_voice *voice);
274
275 if (voice == NULL || !voice->use)
276 return;
277 snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_VOICE | voice->number);
278 snd_gf1_clear_voices(gus, voice->number, voice->number);
279 spin_lock_irqsave(&gus->voice_alloc, flags);
280 private_free = voice->private_free;
281 voice->private_free = NULL;
282 voice->private_data = NULL;
283 if (voice->pcm)
284 gus->gf1.pcm_alloc_voices--;
285 voice->use = voice->pcm = 0;
286 voice->sample_ops = NULL;
287 spin_unlock_irqrestore(&gus->voice_alloc, flags);
288 if (private_free)
289 private_free(voice);
290 }
291
292 /*
293 * call this function only by start of driver
294 */
295
snd_gf1_start(struct snd_gus_card * gus)296 int snd_gf1_start(struct snd_gus_card * gus)
297 {
298 unsigned long flags;
299 unsigned int i;
300
301 snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0); /* reset GF1 */
302 udelay(160);
303 snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1); /* disable IRQ & DAC */
304 udelay(160);
305 snd_gf1_i_write8(gus, SNDRV_GF1_GB_JOYSTICK_DAC_LEVEL, gus->joystick_dac);
306
307 snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_ALL);
308 for (i = 0; i < 32; i++) {
309 gus->gf1.voices[i].number = i;
310 snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_VOICE | i);
311 }
312
313 snd_gf1_uart_cmd(gus, 0x03); /* huh.. this cleanup took me some time... */
314
315 if (gus->gf1.enh_mode) { /* enhanced mode !!!! */
316 snd_gf1_i_write8(gus, SNDRV_GF1_GB_GLOBAL_MODE, snd_gf1_i_look8(gus, SNDRV_GF1_GB_GLOBAL_MODE) | 0x01);
317 snd_gf1_i_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
318 }
319 snd_gf1_clear_regs(gus);
320 snd_gf1_select_active_voices(gus);
321 snd_gf1_delay(gus);
322 gus->gf1.default_voice_address = gus->gf1.memory > 0 ? 0 : 512 - 8;
323 /* initialize LFOs & clear LFOs memory */
324 if (gus->gf1.enh_mode && gus->gf1.memory) {
325 gus->gf1.hw_lfo = 1;
326 gus->gf1.default_voice_address += 1024;
327 } else {
328 gus->gf1.sw_lfo = 1;
329 }
330
331 if (gus->gf1.memory > 0)
332 for (i = 0; i < 4; i++)
333 snd_gf1_poke(gus, gus->gf1.default_voice_address + i, 0);
334 snd_gf1_clear_regs(gus);
335 snd_gf1_clear_voices(gus, 0, 31);
336 snd_gf1_look_regs(gus);
337 udelay(160);
338 snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 7); /* Reset Register = IRQ enable, DAC enable */
339 udelay(160);
340 snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 7); /* Reset Register = IRQ enable, DAC enable */
341 if (gus->gf1.enh_mode) { /* enhanced mode !!!! */
342 snd_gf1_i_write8(gus, SNDRV_GF1_GB_GLOBAL_MODE, snd_gf1_i_look8(gus, SNDRV_GF1_GB_GLOBAL_MODE) | 0x01);
343 snd_gf1_i_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
344 }
345 while ((snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ) & 0xc0) != 0xc0);
346
347 spin_lock_irqsave(&gus->reg_lock, flags);
348 outb(gus->gf1.active_voice = 0, GUSP(gus, GF1PAGE));
349 outb(gus->mix_cntrl_reg, GUSP(gus, MIXCNTRLREG));
350 spin_unlock_irqrestore(&gus->reg_lock, flags);
351
352 snd_gf1_timers_init(gus);
353 snd_gf1_look_regs(gus);
354 snd_gf1_mem_init(gus);
355 snd_gf1_mem_proc_init(gus);
356 #ifdef CONFIG_SND_DEBUG
357 snd_gus_irq_profile_init(gus);
358 #endif
359
360 #if 0
361 if (gus->pnp_flag) {
362 if (gus->chip.playback_fifo_size > 0)
363 snd_gf1_i_write16(gus, SNDRV_GF1_GW_FIFO_RECORD_BASE_ADDR, gus->chip.playback_fifo_block->ptr >> 8);
364 if (gus->chip.record_fifo_size > 0)
365 snd_gf1_i_write16(gus, SNDRV_GF1_GW_FIFO_PLAY_BASE_ADDR, gus->chip.record_fifo_block->ptr >> 8);
366 snd_gf1_i_write16(gus, SNDRV_GF1_GW_FIFO_SIZE, gus->chip.interwave_fifo_reg);
367 }
368 #endif
369
370 return 0;
371 }
372
373 /*
374 * call this function only by shutdown of driver
375 */
376
snd_gf1_stop(struct snd_gus_card * gus)377 int snd_gf1_stop(struct snd_gus_card * gus)
378 {
379 snd_gf1_i_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, 0); /* stop all timers */
380 snd_gf1_stop_voices(gus, 0, 31); /* stop all voices */
381 snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1); /* disable IRQ & DAC */
382 snd_gf1_timers_done(gus);
383 snd_gf1_mem_done(gus);
384
385 return 0;
386 }
387