sound: irq: Remove IRQF_DISABLED
[linux-2.6.git] / sound / isa / sb / sb_common.c
1 /*
2  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
3  *                   Uros Bizjak <uros@kss-loka.si>
4  *
5  *  Lowlevel routines for control of Sound Blaster cards
6  *
7  *   This program is free software; you can redistribute it and/or modify
8  *   it under the terms of the GNU General Public License as published by
9  *   the Free Software Foundation; either version 2 of the License, or
10  *   (at your option) any later version.
11  *
12  *   This program is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *   GNU General Public License for more details.
16  *
17  *   You should have received a copy of the GNU General Public License
18  *   along with this program; if not, write to the Free Software
19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
20  *
21  */
22
23 #include <linux/delay.h>
24 #include <linux/init.h>
25 #include <linux/interrupt.h>
26 #include <linux/slab.h>
27 #include <linux/ioport.h>
28 #include <sound/core.h>
29 #include <sound/sb.h>
30 #include <sound/initval.h>
31
32 #include <asm/io.h>
33 #include <asm/dma.h>
34
35 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
36 MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
37 MODULE_LICENSE("GPL");
38
39 #define BUSY_LOOPS 100000
40
41 #undef IO_DEBUG
42
43 int snd_sbdsp_command(struct snd_sb *chip, unsigned char val)
44 {
45         int i;
46 #ifdef IO_DEBUG
47         snd_printk(KERN_DEBUG "command 0x%x\n", val);
48 #endif
49         for (i = BUSY_LOOPS; i; i--)
50                 if ((inb(SBP(chip, STATUS)) & 0x80) == 0) {
51                         outb(val, SBP(chip, COMMAND));
52                         return 1;
53                 }
54         snd_printd("%s [0x%lx]: timeout (0x%x)\n", __func__, chip->port, val);
55         return 0;
56 }
57
58 int snd_sbdsp_get_byte(struct snd_sb *chip)
59 {
60         int val;
61         int i;
62         for (i = BUSY_LOOPS; i; i--) {
63                 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
64                         val = inb(SBP(chip, READ));
65 #ifdef IO_DEBUG
66                         snd_printk(KERN_DEBUG "get_byte 0x%x\n", val);
67 #endif
68                         return val;
69                 }
70         }
71         snd_printd("%s [0x%lx]: timeout\n", __func__, chip->port);
72         return -ENODEV;
73 }
74
75 int snd_sbdsp_reset(struct snd_sb *chip)
76 {
77         int i;
78
79         outb(1, SBP(chip, RESET));
80         udelay(10);
81         outb(0, SBP(chip, RESET));
82         udelay(30);
83         for (i = BUSY_LOOPS; i; i--)
84                 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
85                         if (inb(SBP(chip, READ)) == 0xaa)
86                                 return 0;
87                         else
88                                 break;
89                 }
90         snd_printdd("%s [0x%lx] failed...\n", __func__, chip->port);
91         return -ENODEV;
92 }
93
94 static int snd_sbdsp_version(struct snd_sb * chip)
95 {
96         unsigned int result = -ENODEV;
97
98         snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
99         result = (short) snd_sbdsp_get_byte(chip) << 8;
100         result |= (short) snd_sbdsp_get_byte(chip);
101         return result;
102 }
103
104 static int snd_sbdsp_probe(struct snd_sb * chip)
105 {
106         int version;
107         int major, minor;
108         char *str;
109         unsigned long flags;
110
111         /*
112          *  initialization sequence
113          */
114
115         spin_lock_irqsave(&chip->reg_lock, flags);
116         if (snd_sbdsp_reset(chip) < 0) {
117                 spin_unlock_irqrestore(&chip->reg_lock, flags);
118                 return -ENODEV;
119         }
120         version = snd_sbdsp_version(chip);
121         if (version < 0) {
122                 spin_unlock_irqrestore(&chip->reg_lock, flags);
123                 return -ENODEV;
124         }
125         spin_unlock_irqrestore(&chip->reg_lock, flags);
126         major = version >> 8;
127         minor = version & 0xff;
128         snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
129                     chip->port, major, minor);
130
131         switch (chip->hardware) {
132         case SB_HW_AUTO:
133                 switch (major) {
134                 case 1:
135                         chip->hardware = SB_HW_10;
136                         str = "1.0";
137                         break;
138                 case 2:
139                         if (minor) {
140                                 chip->hardware = SB_HW_201;
141                                 str = "2.01+";
142                         } else {
143                                 chip->hardware = SB_HW_20;
144                                 str = "2.0";
145                         }
146                         break;
147                 case 3:
148                         chip->hardware = SB_HW_PRO;
149                         str = "Pro";
150                         break;
151                 case 4:
152                         chip->hardware = SB_HW_16;
153                         str = "16";
154                         break;
155                 default:
156                         snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n",
157                                    chip->port, major, minor);
158                         return -ENODEV;
159                 }
160                 break;
161         case SB_HW_ALS100:
162                 str = "16 (ALS-100)";
163                 break;
164         case SB_HW_ALS4000:
165                 str = "16 (ALS-4000)";
166                 break;
167         case SB_HW_DT019X:
168                 str = "(DT019X/ALS007)";
169                 break;
170         case SB_HW_CS5530:
171                 str = "16 (CS5530)";
172                 break;
173         case SB_HW_JAZZ16:
174                 str = "Pro (Jazz16)";
175                 break;
176         default:
177                 return -ENODEV;
178         }
179         sprintf(chip->name, "Sound Blaster %s", str);
180         chip->version = (major << 8) | minor;
181         return 0;
182 }
183
184 static int snd_sbdsp_free(struct snd_sb *chip)
185 {
186         if (chip->res_port)
187                 release_and_free_resource(chip->res_port);
188         if (chip->irq >= 0)
189                 free_irq(chip->irq, (void *) chip);
190 #ifdef CONFIG_ISA
191         if (chip->dma8 >= 0) {
192                 disable_dma(chip->dma8);
193                 free_dma(chip->dma8);
194         }
195         if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
196                 disable_dma(chip->dma16);
197                 free_dma(chip->dma16);
198         }
199 #endif
200         kfree(chip);
201         return 0;
202 }
203
204 static int snd_sbdsp_dev_free(struct snd_device *device)
205 {
206         struct snd_sb *chip = device->device_data;
207         return snd_sbdsp_free(chip);
208 }
209
210 int snd_sbdsp_create(struct snd_card *card,
211                      unsigned long port,
212                      int irq,
213                      irq_handler_t irq_handler,
214                      int dma8,
215                      int dma16,
216                      unsigned short hardware,
217                      struct snd_sb **r_chip)
218 {
219         struct snd_sb *chip;
220         int err;
221         static struct snd_device_ops ops = {
222                 .dev_free =     snd_sbdsp_dev_free,
223         };
224
225         if (snd_BUG_ON(!r_chip))
226                 return -EINVAL;
227         *r_chip = NULL;
228         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
229         if (chip == NULL)
230                 return -ENOMEM;
231         spin_lock_init(&chip->reg_lock);
232         spin_lock_init(&chip->open_lock);
233         spin_lock_init(&chip->midi_input_lock);
234         spin_lock_init(&chip->mixer_lock);
235         chip->irq = -1;
236         chip->dma8 = -1;
237         chip->dma16 = -1;
238         chip->port = port;
239         
240         if (request_irq(irq, irq_handler,
241                         (hardware == SB_HW_ALS4000 ||
242                          hardware == SB_HW_CS5530) ?
243                         IRQF_SHARED : 0,
244                         "SoundBlaster", (void *) chip)) {
245                 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
246                 snd_sbdsp_free(chip);
247                 return -EBUSY;
248         }
249         chip->irq = irq;
250
251         if (hardware == SB_HW_ALS4000)
252                 goto __skip_allocation;
253         
254         if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
255                 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
256                 snd_sbdsp_free(chip);
257                 return -EBUSY;
258         }
259
260 #ifdef CONFIG_ISA
261         if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
262                 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
263                 snd_sbdsp_free(chip);
264                 return -EBUSY;
265         }
266         chip->dma8 = dma8;
267         if (dma16 >= 0) {
268                 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
269                         /* no duplex */
270                         dma16 = -1;
271                 } else if (request_dma(dma16, "SoundBlaster - 16bit")) {
272                         snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
273                         snd_sbdsp_free(chip);
274                         return -EBUSY;
275                 }
276         }
277         chip->dma16 = dma16;
278 #endif
279
280       __skip_allocation:
281         chip->card = card;
282         chip->hardware = hardware;
283         if ((err = snd_sbdsp_probe(chip)) < 0) {
284                 snd_sbdsp_free(chip);
285                 return err;
286         }
287         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
288                 snd_sbdsp_free(chip);
289                 return err;
290         }
291         *r_chip = chip;
292         return 0;
293 }
294
295 EXPORT_SYMBOL(snd_sbdsp_command);
296 EXPORT_SYMBOL(snd_sbdsp_get_byte);
297 EXPORT_SYMBOL(snd_sbdsp_reset);
298 EXPORT_SYMBOL(snd_sbdsp_create);
299 /* sb_mixer.c */
300 EXPORT_SYMBOL(snd_sbmixer_write);
301 EXPORT_SYMBOL(snd_sbmixer_read);
302 EXPORT_SYMBOL(snd_sbmixer_new);
303 EXPORT_SYMBOL(snd_sbmixer_add_ctl);
304 #ifdef CONFIG_PM
305 EXPORT_SYMBOL(snd_sbmixer_suspend);
306 EXPORT_SYMBOL(snd_sbmixer_resume);
307 #endif
308
309 /*
310  *  INIT part
311  */
312
313 static int __init alsa_sb_common_init(void)
314 {
315         return 0;
316 }
317
318 static void __exit alsa_sb_common_exit(void)
319 {
320 }
321
322 module_init(alsa_sb_common_init)
323 module_exit(alsa_sb_common_exit)