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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h>
24#include <linux/delay.h>
25#include <linux/init.h>
26#include <linux/interrupt.h>
27#include <linux/slab.h>
28#include <linux/ioport.h>
29#include <sound/core.h>
30#include <sound/sb.h>
31#include <sound/initval.h>
32
33#include <asm/io.h>
34#include <asm/dma.h>
35
36MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
37MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
38MODULE_LICENSE("GPL");
39
40#define BUSY_LOOPS 100000
41
42#undef IO_DEBUG
43
Takashi Iwai029d64b2005-11-17 14:34:36 +010044int snd_sbdsp_command(struct snd_sb *chip, unsigned char val)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045{
46 int i;
47#ifdef IO_DEBUG
Takashi Iwai99b359b2005-10-20 18:26:44 +020048 snd_printk(KERN_DEBUG "command 0x%x\n", val);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#endif
50 for (i = BUSY_LOOPS; i; i--)
51 if ((inb(SBP(chip, STATUS)) & 0x80) == 0) {
52 outb(val, SBP(chip, COMMAND));
53 return 1;
54 }
55 snd_printd("%s [0x%lx]: timeout (0x%x)\n", __FUNCTION__, chip->port, val);
56 return 0;
57}
58
Takashi Iwai029d64b2005-11-17 14:34:36 +010059int snd_sbdsp_get_byte(struct snd_sb *chip)
Linus Torvalds1da177e2005-04-16 15:20:36 -070060{
61 int val;
62 int i;
63 for (i = BUSY_LOOPS; i; i--) {
64 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
65 val = inb(SBP(chip, READ));
66#ifdef IO_DEBUG
Takashi Iwai99b359b2005-10-20 18:26:44 +020067 snd_printk(KERN_DEBUG "get_byte 0x%x\n", val);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#endif
69 return val;
70 }
71 }
72 snd_printd("%s [0x%lx]: timeout\n", __FUNCTION__, chip->port);
73 return -ENODEV;
74}
75
Takashi Iwai029d64b2005-11-17 14:34:36 +010076int snd_sbdsp_reset(struct snd_sb *chip)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077{
78 int i;
79
80 outb(1, SBP(chip, RESET));
81 udelay(10);
82 outb(0, SBP(chip, RESET));
83 udelay(30);
84 for (i = BUSY_LOOPS; i; i--)
85 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
86 if (inb(SBP(chip, READ)) == 0xaa)
87 return 0;
88 else
89 break;
90 }
91 snd_printdd("%s [0x%lx] failed...\n", __FUNCTION__, chip->port);
92 return -ENODEV;
93}
94
Takashi Iwai029d64b2005-11-17 14:34:36 +010095static int snd_sbdsp_version(struct snd_sb * chip)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
97 unsigned int result = -ENODEV;
98
99 snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
100 result = (short) snd_sbdsp_get_byte(chip) << 8;
101 result |= (short) snd_sbdsp_get_byte(chip);
102 return result;
103}
104
Takashi Iwai029d64b2005-11-17 14:34:36 +0100105static int snd_sbdsp_probe(struct snd_sb * chip)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106{
107 int version;
108 int major, minor;
109 char *str;
110 unsigned long flags;
111
112 /*
113 * initialization sequence
114 */
115
116 spin_lock_irqsave(&chip->reg_lock, flags);
117 if (snd_sbdsp_reset(chip) < 0) {
118 spin_unlock_irqrestore(&chip->reg_lock, flags);
119 return -ENODEV;
120 }
121 version = snd_sbdsp_version(chip);
122 if (version < 0) {
123 spin_unlock_irqrestore(&chip->reg_lock, flags);
124 return -ENODEV;
125 }
126 spin_unlock_irqrestore(&chip->reg_lock, flags);
127 major = version >> 8;
128 minor = version & 0xff;
129 snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
130 chip->port, major, minor);
131
132 switch (chip->hardware) {
133 case SB_HW_AUTO:
134 switch (major) {
135 case 1:
136 chip->hardware = SB_HW_10;
137 str = "1.0";
138 break;
139 case 2:
140 if (minor) {
141 chip->hardware = SB_HW_201;
142 str = "2.01+";
143 } else {
144 chip->hardware = SB_HW_20;
145 str = "2.0";
146 }
147 break;
148 case 3:
149 chip->hardware = SB_HW_PRO;
150 str = "Pro";
151 break;
152 case 4:
153 chip->hardware = SB_HW_16;
154 str = "16";
155 break;
156 default:
Takashi Iwai99b359b2005-10-20 18:26:44 +0200157 snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 chip->port, major, minor);
159 return -ENODEV;
160 }
161 break;
162 case SB_HW_ALS100:
163 str = "16 (ALS-100)";
164 break;
165 case SB_HW_ALS4000:
166 str = "16 (ALS-4000)";
167 break;
168 case SB_HW_DT019X:
169 str = "(DT019X/ALS007)";
170 break;
171 default:
172 return -ENODEV;
173 }
174 sprintf(chip->name, "Sound Blaster %s", str);
175 chip->version = (major << 8) | minor;
176 return 0;
177}
178
Takashi Iwai029d64b2005-11-17 14:34:36 +0100179static int snd_sbdsp_free(struct snd_sb *chip)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180{
Takashi Iwaib1d57762005-10-10 11:56:31 +0200181 if (chip->res_port)
182 release_and_free_resource(chip->res_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 if (chip->irq >= 0)
184 free_irq(chip->irq, (void *) chip);
185#ifdef CONFIG_ISA
186 if (chip->dma8 >= 0) {
187 disable_dma(chip->dma8);
188 free_dma(chip->dma8);
189 }
190 if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
191 disable_dma(chip->dma16);
192 free_dma(chip->dma16);
193 }
194#endif
195 kfree(chip);
196 return 0;
197}
198
Takashi Iwai029d64b2005-11-17 14:34:36 +0100199static int snd_sbdsp_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200{
Takashi Iwai029d64b2005-11-17 14:34:36 +0100201 struct snd_sb *chip = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 return snd_sbdsp_free(chip);
203}
204
Takashi Iwai029d64b2005-11-17 14:34:36 +0100205int snd_sbdsp_create(struct snd_card *card,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 unsigned long port,
207 int irq,
David Howells7d12e782006-10-05 14:55:46 +0100208 irq_handler_t irq_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 int dma8,
210 int dma16,
211 unsigned short hardware,
Takashi Iwai029d64b2005-11-17 14:34:36 +0100212 struct snd_sb **r_chip)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{
Takashi Iwai029d64b2005-11-17 14:34:36 +0100214 struct snd_sb *chip;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 int err;
Takashi Iwai029d64b2005-11-17 14:34:36 +0100216 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 .dev_free = snd_sbdsp_dev_free,
218 };
219
220 snd_assert(r_chip != NULL, return -EINVAL);
221 *r_chip = NULL;
Takashi Iwai9e76a762005-09-09 14:21:17 +0200222 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 if (chip == NULL)
224 return -ENOMEM;
225 spin_lock_init(&chip->reg_lock);
226 spin_lock_init(&chip->open_lock);
227 spin_lock_init(&chip->midi_input_lock);
228 spin_lock_init(&chip->mixer_lock);
229 chip->irq = -1;
230 chip->dma8 = -1;
231 chip->dma16 = -1;
232 chip->port = port;
233
234 if (request_irq(irq, irq_handler, hardware == SB_HW_ALS4000 ?
Thomas Gleixner65ca68b2006-07-01 19:29:46 -0700235 IRQF_DISABLED | IRQF_SHARED : IRQF_DISABLED,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 "SoundBlaster", (void *) chip)) {
237 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
238 snd_sbdsp_free(chip);
239 return -EBUSY;
240 }
241 chip->irq = irq;
242
243 if (hardware == SB_HW_ALS4000)
244 goto __skip_allocation;
245
246 if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
247 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
248 snd_sbdsp_free(chip);
249 return -EBUSY;
250 }
251
252#ifdef CONFIG_ISA
253 if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
254 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
255 snd_sbdsp_free(chip);
256 return -EBUSY;
257 }
258 chip->dma8 = dma8;
259 if (dma16 >= 0) {
260 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
261 /* no duplex */
262 dma16 = -1;
263 } else if (request_dma(dma16, "SoundBlaster - 16bit")) {
264 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
265 snd_sbdsp_free(chip);
266 return -EBUSY;
267 }
268 }
269 chip->dma16 = dma16;
270#endif
271
272 __skip_allocation:
273 chip->card = card;
274 chip->hardware = hardware;
275 if ((err = snd_sbdsp_probe(chip)) < 0) {
276 snd_sbdsp_free(chip);
277 return err;
278 }
279 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
280 snd_sbdsp_free(chip);
281 return err;
282 }
283 *r_chip = chip;
284 return 0;
285}
286
287EXPORT_SYMBOL(snd_sbdsp_command);
288EXPORT_SYMBOL(snd_sbdsp_get_byte);
289EXPORT_SYMBOL(snd_sbdsp_reset);
290EXPORT_SYMBOL(snd_sbdsp_create);
291/* sb_mixer.c */
292EXPORT_SYMBOL(snd_sbmixer_write);
293EXPORT_SYMBOL(snd_sbmixer_read);
294EXPORT_SYMBOL(snd_sbmixer_new);
295EXPORT_SYMBOL(snd_sbmixer_add_ctl);
Takashi Iwai5bdb6a12005-11-17 16:16:10 +0100296#ifdef CONFIG_PM
297EXPORT_SYMBOL(snd_sbmixer_suspend);
298EXPORT_SYMBOL(snd_sbmixer_resume);
299#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
301/*
302 * INIT part
303 */
304
305static int __init alsa_sb_common_init(void)
306{
307 return 0;
308}
309
310static void __exit alsa_sb_common_exit(void)
311{
312}
313
314module_init(alsa_sb_common_init)
315module_exit(alsa_sb_common_exit)