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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 <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@perex.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
44int 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
59int 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
76int 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
95static 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
105static 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
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
185static int snd_sbdsp_free(struct snd_sb *chip)
186{
187 if (chip->res_port)
188 release_and_free_resource(chip->res_port);
189 if (chip->irq >= 0)
190 free_irq(chip->irq, (void *) chip);
191#ifdef CONFIG_ISA
192 if (chip->dma8 >= 0) {
193 disable_dma(chip->dma8);
194 free_dma(chip->dma8);
195 }
196 if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
197 disable_dma(chip->dma16);
198 free_dma(chip->dma16);
199 }
200#endif
201 kfree(chip);
202 return 0;
203}
204
205static int snd_sbdsp_dev_free(struct snd_device *device)
206{
207 struct snd_sb *chip = device->device_data;
208 return snd_sbdsp_free(chip);
209}
210
211int snd_sbdsp_create(struct snd_card *card,
212 unsigned long port,
213 int irq,
214 irq_handler_t irq_handler,
215 int dma8,
216 int dma16,
217 unsigned short hardware,
218 struct snd_sb **r_chip)
219{
220 struct snd_sb *chip;
221 int err;
222 static struct snd_device_ops ops = {
223 .dev_free = snd_sbdsp_dev_free,
224 };
225
226 if (snd_BUG_ON(!r_chip))
227 return -EINVAL;
228 *r_chip = NULL;
229 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
230 if (chip == NULL)
231 return -ENOMEM;
232 spin_lock_init(&chip->reg_lock);
233 spin_lock_init(&chip->open_lock);
234 spin_lock_init(&chip->midi_input_lock);
235 spin_lock_init(&chip->mixer_lock);
236 chip->irq = -1;
237 chip->dma8 = -1;
238 chip->dma16 = -1;
239 chip->port = port;
240
241 if (request_irq(irq, irq_handler,
242 (hardware == SB_HW_ALS4000 ||
243 hardware == SB_HW_CS5530) ?
244 IRQF_SHARED : 0,
245 "SoundBlaster", (void *) chip)) {
246 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
247 snd_sbdsp_free(chip);
248 return -EBUSY;
249 }
250 chip->irq = irq;
251
252 if (hardware == SB_HW_ALS4000)
253 goto __skip_allocation;
254
255 if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
256 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
257 snd_sbdsp_free(chip);
258 return -EBUSY;
259 }
260
261#ifdef CONFIG_ISA
262 if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
263 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
264 snd_sbdsp_free(chip);
265 return -EBUSY;
266 }
267 chip->dma8 = dma8;
268 if (dma16 >= 0) {
269 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
270
271 dma16 = -1;
272 } else if (request_dma(dma16, "SoundBlaster - 16bit")) {
273 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
274 snd_sbdsp_free(chip);
275 return -EBUSY;
276 }
277 }
278 chip->dma16 = dma16;
279#endif
280
281 __skip_allocation:
282 chip->card = card;
283 chip->hardware = hardware;
284 if ((err = snd_sbdsp_probe(chip)) < 0) {
285 snd_sbdsp_free(chip);
286 return err;
287 }
288 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
289 snd_sbdsp_free(chip);
290 return err;
291 }
292 *r_chip = chip;
293 return 0;
294}
295
296EXPORT_SYMBOL(snd_sbdsp_command);
297EXPORT_SYMBOL(snd_sbdsp_get_byte);
298EXPORT_SYMBOL(snd_sbdsp_reset);
299EXPORT_SYMBOL(snd_sbdsp_create);
300
301EXPORT_SYMBOL(snd_sbmixer_write);
302EXPORT_SYMBOL(snd_sbmixer_read);
303EXPORT_SYMBOL(snd_sbmixer_new);
304EXPORT_SYMBOL(snd_sbmixer_add_ctl);
305#ifdef CONFIG_PM
306EXPORT_SYMBOL(snd_sbmixer_suspend);
307EXPORT_SYMBOL(snd_sbmixer_resume);
308#endif
309
310
311
312
313
314static int __init alsa_sb_common_init(void)
315{
316 return 0;
317}
318
319static void __exit alsa_sb_common_exit(void)
320{
321}
322
323module_init(alsa_sb_common_init)
324module_exit(alsa_sb_common_exit)
325
