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9#include <linux/delay.h>
10#include <linux/init.h>
11#include <linux/interrupt.h>
12#include <linux/slab.h>
13#include <linux/ioport.h>
14#include <linux/module.h>
15#include <linux/io.h>
16#include <sound/core.h>
17#include <sound/sb.h>
18#include <sound/initval.h>
19
20#include <asm/dma.h>
21
22MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
23MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards");
24MODULE_LICENSE("GPL");
25
26#define BUSY_LOOPS 100000
27
28#undef IO_DEBUG
29
30int snd_sbdsp_command(struct snd_sb *chip, unsigned char val)
31{
32 int i;
33#ifdef IO_DEBUG
34 snd_printk(KERN_DEBUG "command 0x%x\n", val);
35#endif
36 for (i = BUSY_LOOPS; i; i--)
37 if ((inb(SBP(chip, STATUS)) & 0x80) == 0) {
38 outb(val, SBP(chip, COMMAND));
39 return 1;
40 }
41 snd_printd("%s [0x%lx]: timeout (0x%x)\n", __func__, chip->port, val);
42 return 0;
43}
44
45int snd_sbdsp_get_byte(struct snd_sb *chip)
46{
47 int val;
48 int i;
49 for (i = BUSY_LOOPS; i; i--) {
50 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
51 val = inb(SBP(chip, READ));
52#ifdef IO_DEBUG
53 snd_printk(KERN_DEBUG "get_byte 0x%x\n", val);
54#endif
55 return val;
56 }
57 }
58 snd_printd("%s [0x%lx]: timeout\n", __func__, chip->port);
59 return -ENODEV;
60}
61
62int snd_sbdsp_reset(struct snd_sb *chip)
63{
64 int i;
65
66 outb(1, SBP(chip, RESET));
67 udelay(10);
68 outb(0, SBP(chip, RESET));
69 udelay(30);
70 for (i = BUSY_LOOPS; i; i--)
71 if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
72 if (inb(SBP(chip, READ)) == 0xaa)
73 return 0;
74 else
75 break;
76 }
77 snd_printdd("%s [0x%lx] failed...\n", __func__, chip->port);
78 return -ENODEV;
79}
80
81static int snd_sbdsp_version(struct snd_sb * chip)
82{
83 unsigned int result = -ENODEV;
84
85 snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
86 result = (short) snd_sbdsp_get_byte(chip) << 8;
87 result |= (short) snd_sbdsp_get_byte(chip);
88 return result;
89}
90
91static int snd_sbdsp_probe(struct snd_sb * chip)
92{
93 int version;
94 int major, minor;
95 char *str;
96 unsigned long flags;
97
98
99
100
101
102 spin_lock_irqsave(&chip->reg_lock, flags);
103 if (snd_sbdsp_reset(chip) < 0) {
104 spin_unlock_irqrestore(&chip->reg_lock, flags);
105 return -ENODEV;
106 }
107 version = snd_sbdsp_version(chip);
108 if (version < 0) {
109 spin_unlock_irqrestore(&chip->reg_lock, flags);
110 return -ENODEV;
111 }
112 spin_unlock_irqrestore(&chip->reg_lock, flags);
113 major = version >> 8;
114 minor = version & 0xff;
115 snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
116 chip->port, major, minor);
117
118 switch (chip->hardware) {
119 case SB_HW_AUTO:
120 switch (major) {
121 case 1:
122 chip->hardware = SB_HW_10;
123 str = "1.0";
124 break;
125 case 2:
126 if (minor) {
127 chip->hardware = SB_HW_201;
128 str = "2.01+";
129 } else {
130 chip->hardware = SB_HW_20;
131 str = "2.0";
132 }
133 break;
134 case 3:
135 chip->hardware = SB_HW_PRO;
136 str = "Pro";
137 break;
138 case 4:
139 chip->hardware = SB_HW_16;
140 str = "16";
141 break;
142 default:
143 snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n",
144 chip->port, major, minor);
145 return -ENODEV;
146 }
147 break;
148 case SB_HW_ALS100:
149 str = "16 (ALS-100)";
150 break;
151 case SB_HW_ALS4000:
152 str = "16 (ALS-4000)";
153 break;
154 case SB_HW_DT019X:
155 str = "(DT019X/ALS007)";
156 break;
157 case SB_HW_CS5530:
158 str = "16 (CS5530)";
159 break;
160 case SB_HW_JAZZ16:
161 str = "Pro (Jazz16)";
162 break;
163 default:
164 return -ENODEV;
165 }
166 sprintf(chip->name, "Sound Blaster %s", str);
167 chip->version = (major << 8) | minor;
168 return 0;
169}
170
171static int snd_sbdsp_free(struct snd_sb *chip)
172{
173 release_and_free_resource(chip->res_port);
174 if (chip->irq >= 0)
175 free_irq(chip->irq, (void *) chip);
176#ifdef CONFIG_ISA
177 if (chip->dma8 >= 0) {
178 disable_dma(chip->dma8);
179 free_dma(chip->dma8);
180 }
181 if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
182 disable_dma(chip->dma16);
183 free_dma(chip->dma16);
184 }
185#endif
186 kfree(chip);
187 return 0;
188}
189
190static int snd_sbdsp_dev_free(struct snd_device *device)
191{
192 struct snd_sb *chip = device->device_data;
193 return snd_sbdsp_free(chip);
194}
195
196int snd_sbdsp_create(struct snd_card *card,
197 unsigned long port,
198 int irq,
199 irq_handler_t irq_handler,
200 int dma8,
201 int dma16,
202 unsigned short hardware,
203 struct snd_sb **r_chip)
204{
205 struct snd_sb *chip;
206 int err;
207 static struct snd_device_ops ops = {
208 .dev_free = snd_sbdsp_dev_free,
209 };
210
211 if (snd_BUG_ON(!r_chip))
212 return -EINVAL;
213 *r_chip = NULL;
214 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
215 if (chip == NULL)
216 return -ENOMEM;
217 spin_lock_init(&chip->reg_lock);
218 spin_lock_init(&chip->open_lock);
219 spin_lock_init(&chip->midi_input_lock);
220 spin_lock_init(&chip->mixer_lock);
221 chip->irq = -1;
222 chip->dma8 = -1;
223 chip->dma16 = -1;
224 chip->port = port;
225
226 if (request_irq(irq, irq_handler,
227 (hardware == SB_HW_ALS4000 ||
228 hardware == SB_HW_CS5530) ?
229 IRQF_SHARED : 0,
230 "SoundBlaster", (void *) chip)) {
231 snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
232 snd_sbdsp_free(chip);
233 return -EBUSY;
234 }
235 chip->irq = irq;
236
237 if (hardware == SB_HW_ALS4000)
238 goto __skip_allocation;
239
240 if ((chip->res_port = request_region(port, 16, "SoundBlaster")) == NULL) {
241 snd_printk(KERN_ERR "sb: can't grab port 0x%lx\n", port);
242 snd_sbdsp_free(chip);
243 return -EBUSY;
244 }
245
246#ifdef CONFIG_ISA
247 if (dma8 >= 0 && request_dma(dma8, "SoundBlaster - 8bit")) {
248 snd_printk(KERN_ERR "sb: can't grab DMA8 %d\n", dma8);
249 snd_sbdsp_free(chip);
250 return -EBUSY;
251 }
252 chip->dma8 = dma8;
253 if (dma16 >= 0) {
254 if (hardware != SB_HW_ALS100 && (dma16 < 5 || dma16 > 7)) {
255
256 dma16 = -1;
257 } else if (request_dma(dma16, "SoundBlaster - 16bit")) {
258 snd_printk(KERN_ERR "sb: can't grab DMA16 %d\n", dma16);
259 snd_sbdsp_free(chip);
260 return -EBUSY;
261 }
262 }
263 chip->dma16 = dma16;
264#endif
265
266 __skip_allocation:
267 chip->card = card;
268 chip->hardware = hardware;
269 if ((err = snd_sbdsp_probe(chip)) < 0) {
270 snd_sbdsp_free(chip);
271 return err;
272 }
273 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
274 snd_sbdsp_free(chip);
275 return err;
276 }
277 *r_chip = chip;
278 return 0;
279}
280
281EXPORT_SYMBOL(snd_sbdsp_command);
282EXPORT_SYMBOL(snd_sbdsp_get_byte);
283EXPORT_SYMBOL(snd_sbdsp_reset);
284EXPORT_SYMBOL(snd_sbdsp_create);
285
286EXPORT_SYMBOL(snd_sbmixer_write);
287EXPORT_SYMBOL(snd_sbmixer_read);
288EXPORT_SYMBOL(snd_sbmixer_new);
289EXPORT_SYMBOL(snd_sbmixer_add_ctl);
290#ifdef CONFIG_PM
291EXPORT_SYMBOL(snd_sbmixer_suspend);
292EXPORT_SYMBOL(snd_sbmixer_resume);
293#endif
294
