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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * Uros Bizjak <uros@kss-loka.si> |
5 | * | |
6 | * Lowlevel routines for control of Sound Blaster cards | |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
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> | |
da155d5b | 14 | #include <linux/module.h> |
6cbbfe1c | 15 | #include <linux/io.h> |
1da177e4 LT |
16 | #include <sound/core.h> |
17 | #include <sound/sb.h> | |
18 | #include <sound/initval.h> | |
19 | ||
1da177e4 LT |
20 | #include <asm/dma.h> |
21 | ||
c1017a4c | 22 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
23 | MODULE_DESCRIPTION("ALSA lowlevel driver for Sound Blaster cards"); |
24 | MODULE_LICENSE("GPL"); | |
25 | ||
26 | #define BUSY_LOOPS 100000 | |
27 | ||
28 | #undef IO_DEBUG | |
29 | ||
029d64b0 | 30 | int snd_sbdsp_command(struct snd_sb *chip, unsigned char val) |
1da177e4 LT |
31 | { |
32 | int i; | |
33 | #ifdef IO_DEBUG | |
99b359ba | 34 | snd_printk(KERN_DEBUG "command 0x%x\n", val); |
1da177e4 LT |
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 | } | |
9bf8e7dd | 41 | snd_printd("%s [0x%lx]: timeout (0x%x)\n", __func__, chip->port, val); |
1da177e4 LT |
42 | return 0; |
43 | } | |
44 | ||
029d64b0 | 45 | int snd_sbdsp_get_byte(struct snd_sb *chip) |
1da177e4 LT |
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 | |
99b359ba | 53 | snd_printk(KERN_DEBUG "get_byte 0x%x\n", val); |
1da177e4 LT |
54 | #endif |
55 | return val; | |
56 | } | |
57 | } | |
9bf8e7dd | 58 | snd_printd("%s [0x%lx]: timeout\n", __func__, chip->port); |
1da177e4 LT |
59 | return -ENODEV; |
60 | } | |
61 | ||
029d64b0 | 62 | int snd_sbdsp_reset(struct snd_sb *chip) |
1da177e4 LT |
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 | } | |
9bf8e7dd | 77 | snd_printdd("%s [0x%lx] failed...\n", __func__, chip->port); |
1da177e4 LT |
78 | return -ENODEV; |
79 | } | |
80 | ||
029d64b0 | 81 | static int snd_sbdsp_version(struct snd_sb * chip) |
1da177e4 LT |
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 | ||
029d64b0 | 91 | static int snd_sbdsp_probe(struct snd_sb * chip) |
1da177e4 LT |
92 | { |
93 | int version; | |
94 | int major, minor; | |
95 | char *str; | |
96 | unsigned long flags; | |
97 | ||
98 | /* | |
99 | * initialization sequence | |
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); | |
621887ae | 117 | |
1da177e4 LT |
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: | |
99b359ba | 143 | snd_printk(KERN_INFO "SB [0x%lx]: unknown DSP chip version %i.%i\n", |
1da177e4 LT |
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; | |
621887ae TI |
157 | case SB_HW_CS5530: |
158 | str = "16 (CS5530)"; | |
159 | break; | |
ad8decb7 KH |
160 | case SB_HW_JAZZ16: |
161 | str = "Pro (Jazz16)"; | |
162 | break; | |
1da177e4 LT |
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 | ||
029d64b0 | 171 | static int snd_sbdsp_free(struct snd_sb *chip) |
1da177e4 | 172 | { |
966b7bc9 | 173 | release_and_free_resource(chip->res_port); |
1da177e4 LT |
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 | ||
029d64b0 | 190 | static int snd_sbdsp_dev_free(struct snd_device *device) |
1da177e4 | 191 | { |
029d64b0 | 192 | struct snd_sb *chip = device->device_data; |
1da177e4 LT |
193 | return snd_sbdsp_free(chip); |
194 | } | |
195 | ||
029d64b0 | 196 | int snd_sbdsp_create(struct snd_card *card, |
1da177e4 LT |
197 | unsigned long port, |
198 | int irq, | |
7d12e780 | 199 | irq_handler_t irq_handler, |
1da177e4 LT |
200 | int dma8, |
201 | int dma16, | |
202 | unsigned short hardware, | |
029d64b0 | 203 | struct snd_sb **r_chip) |
1da177e4 | 204 | { |
029d64b0 | 205 | struct snd_sb *chip; |
1da177e4 | 206 | int err; |
029d64b0 | 207 | static struct snd_device_ops ops = { |
1da177e4 LT |
208 | .dev_free = snd_sbdsp_dev_free, |
209 | }; | |
210 | ||
622207dc TI |
211 | if (snd_BUG_ON(!r_chip)) |
212 | return -EINVAL; | |
1da177e4 | 213 | *r_chip = NULL; |
9e76a76e | 214 | chip = kzalloc(sizeof(*chip), GFP_KERNEL); |
1da177e4 LT |
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 | ||
2d4a485b TI |
226 | if (request_irq(irq, irq_handler, |
227 | (hardware == SB_HW_ALS4000 || | |
228 | hardware == SB_HW_CS5530) ? | |
88e24c3a | 229 | IRQF_SHARED : 0, |
1da177e4 LT |
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 | /* no duplex */ | |
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 | ||
281 | EXPORT_SYMBOL(snd_sbdsp_command); | |
282 | EXPORT_SYMBOL(snd_sbdsp_get_byte); | |
283 | EXPORT_SYMBOL(snd_sbdsp_reset); | |
284 | EXPORT_SYMBOL(snd_sbdsp_create); | |
285 | /* sb_mixer.c */ | |
286 | EXPORT_SYMBOL(snd_sbmixer_write); | |
287 | EXPORT_SYMBOL(snd_sbmixer_read); | |
288 | EXPORT_SYMBOL(snd_sbmixer_new); | |
289 | EXPORT_SYMBOL(snd_sbmixer_add_ctl); | |
5bdb6a16 TI |
290 | #ifdef CONFIG_PM |
291 | EXPORT_SYMBOL(snd_sbmixer_suspend); | |
292 | EXPORT_SYMBOL(snd_sbmixer_resume); | |
293 | #endif |