Various drivers' irq handlers: kill dead code, needless casts
[linux-2.6.git] / sound / isa / gus / gusmax.c
1 /*
2  *  Driver for Gravis UltraSound MAX soundcard
3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4  *
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
10  *
11  *   This program is distributed in the hope that it will be useful,
12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *   GNU General Public License for more details.
15  *
16  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  *
20  */
21
22 #include <sound/driver.h>
23 #include <linux/init.h>
24 #include <linux/err.h>
25 #include <linux/platform_device.h>
26 #include <linux/delay.h>
27 #include <linux/time.h>
28 #include <linux/moduleparam.h>
29 #include <asm/dma.h>
30 #include <sound/core.h>
31 #include <sound/gus.h>
32 #include <sound/cs4231.h>
33 #define SNDRV_LEGACY_FIND_FREE_IRQ
34 #define SNDRV_LEGACY_FIND_FREE_DMA
35 #include <sound/initval.h>
36
37 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
38 MODULE_DESCRIPTION("Gravis UltraSound MAX");
39 MODULE_LICENSE("GPL");
40 MODULE_SUPPORTED_DEVICE("{{Gravis,UltraSound MAX}}");
41
42 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
43 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
44 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;  /* Enable this card */
45 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* 0x220,0x230,0x240,0x250,0x260 */
46 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* 2,3,5,9,11,12,15 */
47 static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* 1,3,5,6,7 */
48 static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* 1,3,5,6,7 */
49 static int joystick_dac[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 29};
50                                 /* 0 to 31, (0.59V-4.52V or 0.389V-2.98V) */
51 static int channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 24};
52 static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
53
54 module_param_array(index, int, NULL, 0444);
55 MODULE_PARM_DESC(index, "Index value for GUS MAX soundcard.");
56 module_param_array(id, charp, NULL, 0444);
57 MODULE_PARM_DESC(id, "ID string for GUS MAX soundcard.");
58 module_param_array(enable, bool, NULL, 0444);
59 MODULE_PARM_DESC(enable, "Enable GUS MAX soundcard.");
60 module_param_array(port, long, NULL, 0444);
61 MODULE_PARM_DESC(port, "Port # for GUS MAX driver.");
62 module_param_array(irq, int, NULL, 0444);
63 MODULE_PARM_DESC(irq, "IRQ # for GUS MAX driver.");
64 module_param_array(dma1, int, NULL, 0444);
65 MODULE_PARM_DESC(dma1, "DMA1 # for GUS MAX driver.");
66 module_param_array(dma2, int, NULL, 0444);
67 MODULE_PARM_DESC(dma2, "DMA2 # for GUS MAX driver.");
68 module_param_array(joystick_dac, int, NULL, 0444);
69 MODULE_PARM_DESC(joystick_dac, "Joystick DAC level 0.59V-4.52V or 0.389V-2.98V for GUS MAX driver.");
70 module_param_array(channels, int, NULL, 0444);
71 MODULE_PARM_DESC(channels, "Used GF1 channels for GUS MAX driver.");
72 module_param_array(pcm_channels, int, NULL, 0444);
73 MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for GUS MAX driver.");
74
75 static struct platform_device *devices[SNDRV_CARDS];
76
77 struct snd_gusmax {
78         int irq;
79         struct snd_card *card;
80         struct snd_gus_card *gus;
81         struct snd_cs4231 *cs4231;
82         unsigned short gus_status_reg;
83         unsigned short pcm_status_reg;
84 };
85
86 #define PFX     "gusmax: "
87
88 static int __init snd_gusmax_detect(struct snd_gus_card * gus)
89 {
90         unsigned char d;
91
92         snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0);   /* reset GF1 */
93         if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 0) {
94                 snd_printdd("[0x%lx] check 1 failed - 0x%x\n", gus->gf1.port, d);
95                 return -ENODEV;
96         }
97         udelay(160);
98         snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1);   /* release reset */
99         udelay(160);
100         if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 1) {
101                 snd_printdd("[0x%lx] check 2 failed - 0x%x\n", gus->gf1.port, d);
102                 return -ENODEV;
103         }
104
105         return 0;
106 }
107
108 static irqreturn_t snd_gusmax_interrupt(int irq, void *dev_id)
109 {
110         struct snd_gusmax *maxcard = dev_id;
111         int loop, max = 5;
112         int handled = 0;
113
114         do {
115                 loop = 0;
116                 if (inb(maxcard->gus_status_reg)) {
117                         handled = 1;
118                         snd_gus_interrupt(irq, maxcard->gus);
119                         loop++;
120                 }
121                 if (inb(maxcard->pcm_status_reg) & 0x01) { /* IRQ bit is set? */
122                         handled = 1;
123                         snd_cs4231_interrupt(irq, maxcard->cs4231);
124                         loop++;
125                 }
126         } while (loop && --max > 0);
127         return IRQ_RETVAL(handled);
128 }
129
130 static void __init snd_gusmax_init(int dev, struct snd_card *card, struct snd_gus_card * gus)
131 {
132         gus->equal_irq = 1;
133         gus->codec_flag = 1;
134         gus->joystick_dac = joystick_dac[dev];
135         /* init control register */
136         gus->max_cntrl_val = (gus->gf1.port >> 4) & 0x0f;
137         if (gus->gf1.dma1 > 3)
138                 gus->max_cntrl_val |= 0x10;
139         if (gus->gf1.dma2 > 3)
140                 gus->max_cntrl_val |= 0x20;
141         gus->max_cntrl_val |= 0x40;
142         outb(gus->max_cntrl_val, GUSP(gus, MAXCNTRLPORT));
143 }
144
145 #define CS4231_PRIVATE( left, right, shift, mute ) \
146                         ((left << 24)|(right << 16)|(shift<<8)|mute)
147
148 static int __init snd_gusmax_mixer(struct snd_cs4231 *chip)
149 {
150         struct snd_card *card = chip->card;
151         struct snd_ctl_elem_id id1, id2;
152         int err;
153         
154         memset(&id1, 0, sizeof(id1));
155         memset(&id2, 0, sizeof(id2));
156         id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
157         /* reassign AUXA to SYNTHESIZER */
158         strcpy(id1.name, "Aux Playback Switch");
159         strcpy(id2.name, "Synth Playback Switch");
160         if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
161                 return err;
162         strcpy(id1.name, "Aux Playback Volume");
163         strcpy(id2.name, "Synth Playback Volume");
164         if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
165                 return err;
166         /* reassign AUXB to CD */
167         strcpy(id1.name, "Aux Playback Switch"); id1.index = 1;
168         strcpy(id2.name, "CD Playback Switch");
169         if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
170                 return err;
171         strcpy(id1.name, "Aux Playback Volume");
172         strcpy(id2.name, "CD Playback Volume");
173         if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0)
174                 return err;
175 #if 0
176         /* reassign Mono Input to MIC */
177         if (snd_mixer_group_rename(mixer,
178                                 SNDRV_MIXER_IN_MONO, 0,
179                                 SNDRV_MIXER_IN_MIC, 0) < 0)
180                 goto __error;
181         if (snd_mixer_elem_rename(mixer,
182                                 SNDRV_MIXER_IN_MONO, 0, SNDRV_MIXER_ETYPE_INPUT,
183                                 SNDRV_MIXER_IN_MIC, 0) < 0)
184                 goto __error;
185         if (snd_mixer_elem_rename(mixer,
186                                 "Mono Capture Volume", 0, SNDRV_MIXER_ETYPE_VOLUME1,
187                                 "Mic Capture Volume", 0) < 0)
188                 goto __error;
189         if (snd_mixer_elem_rename(mixer,
190                                 "Mono Capture Switch", 0, SNDRV_MIXER_ETYPE_SWITCH1,
191                                 "Mic Capture Switch", 0) < 0)
192                 goto __error;
193 #endif
194         return 0;
195 }
196
197 static void snd_gusmax_free(struct snd_card *card)
198 {
199         struct snd_gusmax *maxcard = (struct snd_gusmax *)card->private_data;
200         
201         if (maxcard == NULL)
202                 return;
203         if (maxcard->irq >= 0)
204                 free_irq(maxcard->irq, (void *)maxcard);
205 }
206
207 static int __init snd_gusmax_probe(struct platform_device *pdev)
208 {
209         int dev = pdev->id;
210         static int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, -1};
211         static int possible_dmas[] = {5, 6, 7, 1, 3, -1};
212         int xirq, xdma1, xdma2, err;
213         struct snd_card *card;
214         struct snd_gus_card *gus = NULL;
215         struct snd_cs4231 *cs4231;
216         struct snd_gusmax *maxcard;
217
218         card = snd_card_new(index[dev], id[dev], THIS_MODULE,
219                             sizeof(struct snd_gusmax));
220         if (card == NULL)
221                 return -ENOMEM;
222         card->private_free = snd_gusmax_free;
223         maxcard = (struct snd_gusmax *)card->private_data;
224         maxcard->card = card;
225         maxcard->irq = -1;
226         
227         xirq = irq[dev];
228         if (xirq == SNDRV_AUTO_IRQ) {
229                 if ((xirq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
230                         snd_printk(KERN_ERR PFX "unable to find a free IRQ\n");
231                         err = -EBUSY;
232                         goto _err;
233                 }
234         }
235         xdma1 = dma1[dev];
236         if (xdma1 == SNDRV_AUTO_DMA) {
237                 if ((xdma1 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
238                         snd_printk(KERN_ERR PFX "unable to find a free DMA1\n");
239                         err = -EBUSY;
240                         goto _err;
241                 }
242         }
243         xdma2 = dma2[dev];
244         if (xdma2 == SNDRV_AUTO_DMA) {
245                 if ((xdma2 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
246                         snd_printk(KERN_ERR PFX "unable to find a free DMA2\n");
247                         err = -EBUSY;
248                         goto _err;
249                 }
250         }
251
252         if (port[dev] != SNDRV_AUTO_PORT) {
253                 err = snd_gus_create(card,
254                                      port[dev],
255                                      -xirq, xdma1, xdma2,
256                                      0, channels[dev],
257                                      pcm_channels[dev],
258                                      0, &gus);
259         } else {
260                 static unsigned long possible_ports[] = {
261                         0x220, 0x230, 0x240, 0x250, 0x260
262                 };
263                 int i;
264                 for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
265                         err = snd_gus_create(card,
266                                              possible_ports[i],
267                                              -xirq, xdma1, xdma2,
268                                              0, channels[dev],
269                                              pcm_channels[dev],
270                                              0, &gus);
271                         if (err >= 0) {
272                                 port[dev] = possible_ports[i];
273                                 break;
274                         }
275                 }
276         }
277         if (err < 0)
278                 goto _err;
279
280         if ((err = snd_gusmax_detect(gus)) < 0)
281                 goto _err;
282
283         maxcard->gus_status_reg = gus->gf1.reg_irqstat;
284         maxcard->pcm_status_reg = gus->gf1.port + 0x10c + 2;
285         snd_gusmax_init(dev, card, gus);
286         if ((err = snd_gus_initialize(gus)) < 0)
287                 goto _err;
288
289         if (!gus->max_flag) {
290                 snd_printk(KERN_ERR PFX "GUS MAX soundcard was not detected at 0x%lx\n", gus->gf1.port);
291                 err = -ENODEV;
292                 goto _err;
293         }
294
295         if (request_irq(xirq, snd_gusmax_interrupt, IRQF_DISABLED, "GUS MAX", (void *)maxcard)) {
296                 snd_printk(KERN_ERR PFX "unable to grab IRQ %d\n", xirq);
297                 err = -EBUSY;
298                 goto _err;
299         }
300         maxcard->irq = xirq;
301         
302         if ((err = snd_cs4231_create(card,
303                                      gus->gf1.port + 0x10c, -1, xirq,
304                                      xdma2 < 0 ? xdma1 : xdma2, xdma1,
305                                      CS4231_HW_DETECT,
306                                      CS4231_HWSHARE_IRQ |
307                                      CS4231_HWSHARE_DMA1 |
308                                      CS4231_HWSHARE_DMA2,
309                                      &cs4231)) < 0)
310                 goto _err;
311
312         if ((err = snd_cs4231_pcm(cs4231, 0, NULL)) < 0)
313                 goto _err;
314
315         if ((err = snd_cs4231_mixer(cs4231)) < 0)
316                 goto _err;
317
318         if ((err = snd_cs4231_timer(cs4231, 2, NULL)) < 0)
319                 goto _err;
320
321         if (pcm_channels[dev] > 0) {
322                 if ((err = snd_gf1_pcm_new(gus, 1, 1, NULL)) < 0)
323                         goto _err;
324         }
325         if ((err = snd_gusmax_mixer(cs4231)) < 0)
326                 goto _err;
327
328         if ((err = snd_gf1_rawmidi_new(gus, 0, NULL)) < 0)
329                 goto _err;
330
331         sprintf(card->longname + strlen(card->longname), " at 0x%lx, irq %i, dma %i", gus->gf1.port, xirq, xdma1);
332         if (xdma2 >= 0)
333                 sprintf(card->longname + strlen(card->longname), "&%i", xdma2);
334
335         snd_card_set_dev(card, &pdev->dev);
336
337         if ((err = snd_card_register(card)) < 0)
338                 goto _err;
339                 
340         maxcard->gus = gus;
341         maxcard->cs4231 = cs4231;
342
343         platform_set_drvdata(pdev, card);
344         return 0;
345
346  _err:
347         snd_card_free(card);
348         return err;
349 }
350
351 static int snd_gusmax_remove(struct platform_device *devptr)
352 {
353         snd_card_free(platform_get_drvdata(devptr));
354         platform_set_drvdata(devptr, NULL);
355         return 0;
356 }
357
358 #define GUSMAX_DRIVER   "snd_gusmax"
359
360 static struct platform_driver snd_gusmax_driver = {
361         .probe          = snd_gusmax_probe,
362         .remove         = snd_gusmax_remove,
363         /* FIXME: suspend/resume */
364         .driver         = {
365                 .name   = GUSMAX_DRIVER
366         },
367 };
368
369 static void __init_or_module snd_gusmax_unregister_all(void)
370 {
371         int i;
372
373         for (i = 0; i < ARRAY_SIZE(devices); ++i)
374                 platform_device_unregister(devices[i]);
375         platform_driver_unregister(&snd_gusmax_driver);
376 }
377
378 static int __init alsa_card_gusmax_init(void)
379 {
380         int i, cards, err;
381
382         err = platform_driver_register(&snd_gusmax_driver);
383         if (err < 0)
384                 return err;
385
386         cards = 0;
387         for (i = 0; i < SNDRV_CARDS; i++) {
388                 struct platform_device *device;
389                 if (! enable[i])
390                         continue;
391                 device = platform_device_register_simple(GUSMAX_DRIVER,
392                                                          i, NULL, 0);
393                 if (IS_ERR(device))
394                         continue;
395                 if (!platform_get_drvdata(device)) {
396                         platform_device_unregister(device);
397                         continue;
398                 }
399                 devices[i] = device;
400                 cards++;
401         }
402         if (!cards) {
403 #ifdef MODULE
404                 printk(KERN_ERR "GUS MAX soundcard not found or device busy\n");
405 #endif
406                 snd_gusmax_unregister_all();
407                 return -ENODEV;
408         }
409         return 0;
410 }
411
412 static void __exit alsa_card_gusmax_exit(void)
413 {
414         snd_gusmax_unregister_all();
415 }
416
417 module_init(alsa_card_gusmax_init)
418 module_exit(alsa_card_gusmax_exit)