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 <linux/module.h>
29 #include <linux/io.h>
30 #include <sound/core.h>
31 #include <sound/sb.h>
32 #include <sound/initval.h>
33
34 #include <asm/dma.h>
35
36 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
37 MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
38 MODULE_LICENSE("GPL");
39
40 #define BUSY_LOOPS 100000
41
42 #undef IO_DEBUG
43
snd_sbdsp_command(struct snd_sb * chip,unsigned char val)44 int snd_sbdsp_command(struct snd_sb *chip, unsigned char val)
45 {
46 int i;
47 #ifdef IO_DEBUG
48 snd_printk(KERN_DEBUG "command 0x%x\n", val);
49 #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", __func__, chip->port, val);
56 return 0;
57 }
58
snd_sbdsp_get_byte(struct snd_sb * chip)59 int snd_sbdsp_get_byte(struct snd_sb *chip)
60 {
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
67 snd_printk(KERN_DEBUG "get_byte 0x%x\n", val);
68 #endif
69 return val;
70 }
71 }
72 snd_printd("%s [0x%lx]: timeout\n", __func__, chip->port);
73 return -ENODEV;
74 }
75
snd_sbdsp_reset(struct snd_sb * chip)76 int snd_sbdsp_reset(struct snd_sb *chip)
77 {
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", __func__, chip->port);
92 return -ENODEV;
93 }
94
snd_sbdsp_version(struct snd_sb * chip)95 static int snd_sbdsp_version(struct snd_sb * chip)
96 {
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
snd_sbdsp_probe(struct snd_sb * chip)105 static int snd_sbdsp_probe(struct snd_sb * chip)
106 {
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:
157 snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n",
158 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 case SB_HW_CS5530:
172 str = "16 (CS5530)";
173 break;
174 case SB_HW_JAZZ16:
175 str = "Pro (Jazz16)";
176 break;
177 default:
178 return -ENODEV;
179 }
180 sprintf(chip->name, "Sound Blaster %s", str);
181 chip->version = (major << 8) | minor;
182 return 0;
183 }
184
snd_sbdsp_free(struct snd_sb * chip)185 static int snd_sbdsp_free(struct snd_sb *chip)
186 {
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
snd_sbdsp_dev_free(struct snd_device * device)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
snd_sbdsp_create(struct snd_card * card,unsigned long port,int irq,irq_handler_t irq_handler,int dma8,int dma16,unsigned short hardware,struct snd_sb ** r_chip)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
alsa_sb_common_init(void)313 static int __init alsa_sb_common_init(void)
314 {
315 return 0;
316 }
317
alsa_sb_common_exit(void)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)
324