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
snd_sbdsp_command(struct snd_sb * chip,unsigned char val)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
snd_sbdsp_get_byte(struct snd_sb * chip)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
snd_sbdsp_reset(struct snd_sb * chip)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
snd_sbdsp_version(struct snd_sb * chip)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
snd_sbdsp_probe(struct snd_sb * chip)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 default:
174 return -ENODEV;
175 }
176 sprintf(chip->name, "Sound Blaster %s", str);
177 chip->version = (major << 8) | minor;
178 return 0;
179 }
180
snd_sbdsp_free(struct snd_sb * chip)181 static int snd_sbdsp_free(struct snd_sb *chip)
182 {
183 if (chip->res_port)
184 release_and_free_resource(chip->res_port);
185 if (chip->irq >= 0)
186 free_irq(chip->irq, (void *) chip);
187 #ifdef CONFIG_ISA
188 if (chip->dma8 >= 0) {
189 disable_dma(chip->dma8);
190 free_dma(chip->dma8);
191 }
192 if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
193 disable_dma(chip->dma16);
194 free_dma(chip->dma16);
195 }
196 #endif
197 kfree(chip);
198 return 0;
199 }
200
snd_sbdsp_dev_free(struct snd_device * device)201 static int snd_sbdsp_dev_free(struct snd_device *device)
202 {
203 struct snd_sb *chip = device->device_data;
204 return snd_sbdsp_free(chip);
205 }
206
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)207 int snd_sbdsp_create(struct snd_card *card,
208 unsigned long port,
209 int irq,
210 irq_handler_t irq_handler,
211 int dma8,
212 int dma16,
213 unsigned short hardware,
214 struct snd_sb **r_chip)
215 {
216 struct snd_sb *chip;
217 int err;
218 static struct snd_device_ops ops = {
219 .dev_free = snd_sbdsp_dev_free,
220 };
221
222 if (snd_BUG_ON(!r_chip))
223 return -EINVAL;
224 *r_chip = NULL;
225 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
226 if (chip == NULL)
227 return -ENOMEM;
228 spin_lock_init(&chip->reg_lock);
229 spin_lock_init(&chip->open_lock);
230 spin_lock_init(&chip->midi_input_lock);
231 spin_lock_init(&chip->mixer_lock);
232 chip->irq = -1;
233 chip->dma8 = -1;
234 chip->dma16 = -1;
235 chip->port = port;
236
237 if (request_irq(irq, irq_handler,
238 (hardware == SB_HW_ALS4000 ||
239 hardware == SB_HW_CS5530) ?
240 IRQF_SHARED : IRQF_DISABLED,
241 "SoundBlaster", (void *) chip)) {
242 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
243 snd_sbdsp_free(chip);
244 return -EBUSY;
245 }
246 chip->irq = irq;
247
248 if (hardware == SB_HW_ALS4000)
249 goto __skip_allocation;
250
251 if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
252 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
253 snd_sbdsp_free(chip);
254 return -EBUSY;
255 }
256
257 #ifdef CONFIG_ISA
258 if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
259 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
260 snd_sbdsp_free(chip);
261 return -EBUSY;
262 }
263 chip->dma8 = dma8;
264 if (dma16 >= 0) {
265 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
266 /* no duplex */
267 dma16 = -1;
268 } else if (request_dma(dma16, "SoundBlaster - 16bit")) {
269 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
270 snd_sbdsp_free(chip);
271 return -EBUSY;
272 }
273 }
274 chip->dma16 = dma16;
275 #endif
276
277 __skip_allocation:
278 chip->card = card;
279 chip->hardware = hardware;
280 if ((err = snd_sbdsp_probe(chip)) < 0) {
281 snd_sbdsp_free(chip);
282 return err;
283 }
284 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
285 snd_sbdsp_free(chip);
286 return err;
287 }
288 *r_chip = chip;
289 return 0;
290 }
291
292 EXPORT_SYMBOL(snd_sbdsp_command);
293 EXPORT_SYMBOL(snd_sbdsp_get_byte);
294 EXPORT_SYMBOL(snd_sbdsp_reset);
295 EXPORT_SYMBOL(snd_sbdsp_create);
296 /* sb_mixer.c */
297 EXPORT_SYMBOL(snd_sbmixer_write);
298 EXPORT_SYMBOL(snd_sbmixer_read);
299 EXPORT_SYMBOL(snd_sbmixer_new);
300 EXPORT_SYMBOL(snd_sbmixer_add_ctl);
301 #ifdef CONFIG_PM
302 EXPORT_SYMBOL(snd_sbmixer_suspend);
303 EXPORT_SYMBOL(snd_sbmixer_resume);
304 #endif
305
306 /*
307 * INIT part
308 */
309
alsa_sb_common_init(void)310 static int __init alsa_sb_common_init(void)
311 {
312 return 0;
313 }
314
alsa_sb_common_exit(void)315 static void __exit alsa_sb_common_exit(void)
316 {
317 }
318
319 module_init(alsa_sb_common_init)
320 module_exit(alsa_sb_common_exit)
321