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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 <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 | ||
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 | ||
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", __FUNCTION__, chip->port, val); | |
56 | return 0; | |
57 | } | |
58 | ||
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", __FUNCTION__, chip->port); | |
73 | return -ENODEV; | |
74 | } | |
75 | ||
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", __FUNCTION__, chip->port); | |
92 | return -ENODEV; | |
93 | } | |
94 | ||
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 | ||
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 | default: | |
175 | return -ENODEV; | |
176 | } | |
177 | sprintf(chip->name, "Sound Blaster %s", str); | |
178 | chip->version = (major << 8) | minor; | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static int snd_sbdsp_free(struct snd_sb *chip) | |
183 | { | |
184 | if (chip->res_port) | |
185 | release_and_free_resource(chip->res_port); | |
186 | if (chip->irq >= 0) | |
187 | free_irq(chip->irq, (void *) chip); | |
188 | #ifdef CONFIG_ISA | |
189 | if (chip->dma8 >= 0) { | |
190 | disable_dma(chip->dma8); | |
191 | free_dma(chip->dma8); | |
192 | } | |
193 | if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) { | |
194 | disable_dma(chip->dma16); | |
195 | free_dma(chip->dma16); | |
196 | } | |
197 | #endif | |
198 | kfree(chip); | |
199 | return 0; | |
200 | } | |
201 | ||
202 | static int snd_sbdsp_dev_free(struct snd_device *device) | |
203 | { | |
204 | struct snd_sb *chip = device->device_data; | |
205 | return snd_sbdsp_free(chip); | |
206 | } | |
207 | ||
208 | int snd_sbdsp_create(struct snd_card *card, | |
209 | unsigned long port, | |
210 | int irq, | |
211 | irq_handler_t irq_handler, | |
212 | int dma8, | |
213 | int dma16, | |
214 | unsigned short hardware, | |
215 | struct snd_sb **r_chip) | |
216 | { | |
217 | struct snd_sb *chip; | |
218 | int err; | |
219 | static struct snd_device_ops ops = { | |
220 | .dev_free = snd_sbdsp_dev_free, | |
221 | }; | |
222 | ||
223 | snd_assert(r_chip != NULL, 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 | ||
310 | static int __init alsa_sb_common_init(void) | |
311 | { | |
312 | return 0; | |
313 | } | |
314 | ||
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) |