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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * BRIEF MODULE DESCRIPTION | |
3 | * Driver for AMD Au1000 MIPS Processor, AC'97 Sound Port | |
4 | * | |
5 | * Copyright 2004 Cooper Street Innovations Inc. | |
6 | * Author: Charles Eidsness <charles@cooper-street.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
14 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
15 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
16 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
19 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
20 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License along | |
25 | * with this program; if not, write to the Free Software Foundation, Inc., | |
26 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
27 | * | |
28 | * History: | |
29 | * | |
30 | * 2004-09-09 Charles Eidsness -- Original verion -- based on | |
31 | * sa11xx-uda1341.c ALSA driver and the | |
32 | * au1000.c OSS driver. | |
33 | * 2004-09-09 Matt Porter -- Added support for ALSA 1.0.6 | |
34 | * | |
35 | */ | |
36 | ||
37 | #include <linux/ioport.h> | |
38 | #include <linux/interrupt.h> | |
1da177e4 LT |
39 | #include <linux/init.h> |
40 | #include <linux/slab.h> | |
da155d5b | 41 | #include <linux/module.h> |
1da177e4 LT |
42 | #include <sound/core.h> |
43 | #include <sound/initval.h> | |
44 | #include <sound/pcm.h> | |
d8327c78 | 45 | #include <sound/pcm_params.h> |
1da177e4 LT |
46 | #include <sound/ac97_codec.h> |
47 | #include <asm/mach-au1x00/au1000.h> | |
48 | #include <asm/mach-au1x00/au1000_dma.h> | |
49 | ||
50 | MODULE_AUTHOR("Charles Eidsness <charles@cooper-street.com>"); | |
51 | MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver"); | |
52 | MODULE_LICENSE("GPL"); | |
1da177e4 | 53 | MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}"); |
1da177e4 | 54 | |
1da177e4 LT |
55 | #define PLAYBACK 0 |
56 | #define CAPTURE 1 | |
57 | #define AC97_SLOT_3 0x01 | |
58 | #define AC97_SLOT_4 0x02 | |
59 | #define AC97_SLOT_6 0x08 | |
60 | #define AC97_CMD_IRQ 31 | |
61 | #define READ 0 | |
62 | #define WRITE 1 | |
63 | #define READ_WAIT 2 | |
64 | #define RW_DONE 3 | |
65 | ||
1da177e4 LT |
66 | struct au1000_period |
67 | { | |
68 | u32 start; | |
69 | u32 relative_end; /*realtive to start of buffer*/ | |
a0d6f880 | 70 | struct au1000_period * next; |
1da177e4 LT |
71 | }; |
72 | ||
73 | /*Au1000 AC97 Port Control Reisters*/ | |
1da177e4 LT |
74 | struct au1000_ac97_reg { |
75 | u32 volatile config; | |
76 | u32 volatile status; | |
77 | u32 volatile data; | |
78 | u32 volatile cmd; | |
79 | u32 volatile cntrl; | |
80 | }; | |
81 | ||
1da177e4 | 82 | struct audio_stream { |
a0d6f880 | 83 | struct snd_pcm_substream *substream; |
1da177e4 LT |
84 | int dma; |
85 | spinlock_t dma_lock; | |
a0d6f880 | 86 | struct au1000_period * buffer; |
33ea25c1 TI |
87 | unsigned int period_size; |
88 | unsigned int periods; | |
1da177e4 LT |
89 | }; |
90 | ||
a0d6f880 TI |
91 | struct snd_au1000 { |
92 | struct snd_card *card; | |
93 | struct au1000_ac97_reg volatile *ac97_ioport; | |
1da177e4 LT |
94 | |
95 | struct resource *ac97_res_port; | |
96 | spinlock_t ac97_lock; | |
a0d6f880 | 97 | struct snd_ac97 *ac97; |
1da177e4 | 98 | |
a0d6f880 TI |
99 | struct snd_pcm *pcm; |
100 | struct audio_stream *stream[2]; /* playback & capture */ | |
101 | }; | |
1da177e4 | 102 | |
1da177e4 LT |
103 | /*--------------------------- Local Functions --------------------------------*/ |
104 | static void | |
a0d6f880 | 105 | au1000_set_ac97_xmit_slots(struct snd_au1000 *au1000, long xmit_slots) |
1da177e4 LT |
106 | { |
107 | u32 volatile ac97_config; | |
108 | ||
109 | spin_lock(&au1000->ac97_lock); | |
110 | ac97_config = au1000->ac97_ioport->config; | |
111 | ac97_config = ac97_config & ~AC97C_XMIT_SLOTS_MASK; | |
112 | ac97_config |= (xmit_slots << AC97C_XMIT_SLOTS_BIT); | |
113 | au1000->ac97_ioport->config = ac97_config; | |
114 | spin_unlock(&au1000->ac97_lock); | |
115 | } | |
116 | ||
117 | static void | |
a0d6f880 | 118 | au1000_set_ac97_recv_slots(struct snd_au1000 *au1000, long recv_slots) |
1da177e4 LT |
119 | { |
120 | u32 volatile ac97_config; | |
121 | ||
122 | spin_lock(&au1000->ac97_lock); | |
123 | ac97_config = au1000->ac97_ioport->config; | |
124 | ac97_config = ac97_config & ~AC97C_RECV_SLOTS_MASK; | |
125 | ac97_config |= (recv_slots << AC97C_RECV_SLOTS_BIT); | |
126 | au1000->ac97_ioport->config = ac97_config; | |
127 | spin_unlock(&au1000->ac97_lock); | |
128 | } | |
129 | ||
130 | ||
131 | static void | |
a0d6f880 | 132 | au1000_release_dma_link(struct audio_stream *stream) |
1da177e4 | 133 | { |
a0d6f880 TI |
134 | struct au1000_period * pointer; |
135 | struct au1000_period * pointer_next; | |
1da177e4 | 136 | |
33ea25c1 TI |
137 | stream->period_size = 0; |
138 | stream->periods = 0; | |
139 | pointer = stream->buffer; | |
140 | if (! pointer) | |
141 | return; | |
142 | do { | |
143 | pointer_next = pointer->next; | |
144 | kfree(pointer); | |
145 | pointer = pointer_next; | |
146 | } while (pointer != stream->buffer); | |
147 | stream->buffer = NULL; | |
148 | } | |
149 | ||
150 | static int | |
a0d6f880 | 151 | au1000_setup_dma_link(struct audio_stream *stream, unsigned int period_bytes, |
33ea25c1 TI |
152 | unsigned int periods) |
153 | { | |
a0d6f880 TI |
154 | struct snd_pcm_substream *substream = stream->substream; |
155 | struct snd_pcm_runtime *runtime = substream->runtime; | |
d8327c78 | 156 | struct au1000_period *pointer; |
33ea25c1 TI |
157 | unsigned long dma_start; |
158 | int i; | |
159 | ||
160 | dma_start = virt_to_phys(runtime->dma_area); | |
1da177e4 | 161 | |
33ea25c1 TI |
162 | if (stream->period_size == period_bytes && |
163 | stream->periods == periods) | |
164 | return 0; /* not changed */ | |
1da177e4 | 165 | |
33ea25c1 | 166 | au1000_release_dma_link(stream); |
1da177e4 | 167 | |
33ea25c1 TI |
168 | stream->period_size = period_bytes; |
169 | stream->periods = periods; | |
170 | ||
a0d6f880 | 171 | stream->buffer = kmalloc(sizeof(struct au1000_period), GFP_KERNEL); |
33ea25c1 TI |
172 | if (! stream->buffer) |
173 | return -ENOMEM; | |
174 | pointer = stream->buffer; | |
175 | for (i = 0; i < periods; i++) { | |
176 | pointer->start = (u32)(dma_start + (i * period_bytes)); | |
177 | pointer->relative_end = (u32) (((i+1) * period_bytes) - 0x1); | |
178 | if (i < periods - 1) { | |
179 | pointer->next = kmalloc(sizeof(struct au1000_period), GFP_KERNEL); | |
180 | if (! pointer->next) { | |
181 | au1000_release_dma_link(stream); | |
182 | return -ENOMEM; | |
183 | } | |
184 | pointer = pointer->next; | |
185 | } | |
1da177e4 | 186 | } |
33ea25c1 TI |
187 | pointer->next = stream->buffer; |
188 | return 0; | |
1da177e4 LT |
189 | } |
190 | ||
191 | static void | |
a0d6f880 | 192 | au1000_dma_stop(struct audio_stream *stream) |
1da177e4 | 193 | { |
5e246b85 TI |
194 | if (snd_BUG_ON(!stream->buffer)) |
195 | return; | |
33ea25c1 TI |
196 | disable_dma(stream->dma); |
197 | } | |
1da177e4 | 198 | |
33ea25c1 | 199 | static void |
a0d6f880 | 200 | au1000_dma_start(struct audio_stream *stream) |
33ea25c1 | 201 | { |
5e246b85 TI |
202 | if (snd_BUG_ON(!stream->buffer)) |
203 | return; | |
1da177e4 | 204 | |
33ea25c1 TI |
205 | init_dma(stream->dma); |
206 | if (get_dma_active_buffer(stream->dma) == 0) { | |
207 | clear_dma_done0(stream->dma); | |
208 | set_dma_addr0(stream->dma, stream->buffer->start); | |
209 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
210 | set_dma_addr1(stream->dma, stream->buffer->next->start); | |
211 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
212 | } else { | |
213 | clear_dma_done1(stream->dma); | |
214 | set_dma_addr1(stream->dma, stream->buffer->start); | |
215 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
216 | set_dma_addr0(stream->dma, stream->buffer->next->start); | |
217 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
1da177e4 | 218 | } |
33ea25c1 TI |
219 | enable_dma_buffers(stream->dma); |
220 | start_dma(stream->dma); | |
1da177e4 LT |
221 | } |
222 | ||
223 | static irqreturn_t | |
7d12e780 | 224 | au1000_dma_interrupt(int irq, void *dev_id) |
1da177e4 | 225 | { |
a0d6f880 TI |
226 | struct audio_stream *stream = (struct audio_stream *) dev_id; |
227 | struct snd_pcm_substream *substream = stream->substream; | |
1da177e4 LT |
228 | |
229 | spin_lock(&stream->dma_lock); | |
230 | switch (get_dma_buffer_done(stream->dma)) { | |
231 | case DMA_D0: | |
232 | stream->buffer = stream->buffer->next; | |
233 | clear_dma_done0(stream->dma); | |
234 | set_dma_addr0(stream->dma, stream->buffer->next->start); | |
235 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
236 | enable_dma_buffer0(stream->dma); | |
237 | break; | |
238 | case DMA_D1: | |
239 | stream->buffer = stream->buffer->next; | |
240 | clear_dma_done1(stream->dma); | |
241 | set_dma_addr1(stream->dma, stream->buffer->next->start); | |
242 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
243 | enable_dma_buffer1(stream->dma); | |
244 | break; | |
245 | case (DMA_D0 | DMA_D1): | |
1da177e4 LT |
246 | printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma); |
247 | au1000_dma_stop(stream); | |
248 | au1000_dma_start(stream); | |
1da177e4 LT |
249 | break; |
250 | case (~DMA_D0 & ~DMA_D1): | |
251 | printk(KERN_ERR "DMA %d empty irq.\n",stream->dma); | |
252 | } | |
253 | spin_unlock(&stream->dma_lock); | |
254 | snd_pcm_period_elapsed(substream); | |
255 | return IRQ_HANDLED; | |
256 | } | |
257 | ||
258 | /*-------------------------- PCM Audio Streams -------------------------------*/ | |
259 | ||
260 | static unsigned int rates[] = {8000, 11025, 16000, 22050}; | |
a0d6f880 | 261 | static struct snd_pcm_hw_constraint_list hw_constraints_rates = { |
2ad3479d | 262 | .count = ARRAY_SIZE(rates), |
1da177e4 LT |
263 | .list = rates, |
264 | .mask = 0, | |
265 | }; | |
266 | ||
a0d6f880 | 267 | static struct snd_pcm_hardware snd_au1000_hw = |
1da177e4 LT |
268 | { |
269 | .info = (SNDRV_PCM_INFO_INTERLEAVED | \ | |
270 | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID), | |
271 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
272 | .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | | |
273 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050), | |
274 | .rate_min = 8000, | |
275 | .rate_max = 22050, | |
276 | .channels_min = 1, | |
277 | .channels_max = 2, | |
278 | .buffer_bytes_max = 128*1024, | |
279 | .period_bytes_min = 32, | |
280 | .period_bytes_max = 16*1024, | |
281 | .periods_min = 8, | |
282 | .periods_max = 255, | |
283 | .fifo_size = 16, | |
284 | }; | |
285 | ||
286 | static int | |
a0d6f880 | 287 | snd_au1000_playback_open(struct snd_pcm_substream *substream) |
1da177e4 | 288 | { |
a0d6f880 | 289 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 290 | |
1da177e4 LT |
291 | au1000->stream[PLAYBACK]->substream = substream; |
292 | au1000->stream[PLAYBACK]->buffer = NULL; | |
293 | substream->private_data = au1000->stream[PLAYBACK]; | |
33ea25c1 | 294 | substream->runtime->hw = snd_au1000_hw; |
1da177e4 LT |
295 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, |
296 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); | |
297 | } | |
298 | ||
299 | static int | |
a0d6f880 | 300 | snd_au1000_capture_open(struct snd_pcm_substream *substream) |
1da177e4 | 301 | { |
a0d6f880 | 302 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 303 | |
1da177e4 LT |
304 | au1000->stream[CAPTURE]->substream = substream; |
305 | au1000->stream[CAPTURE]->buffer = NULL; | |
306 | substream->private_data = au1000->stream[CAPTURE]; | |
33ea25c1 | 307 | substream->runtime->hw = snd_au1000_hw; |
1da177e4 LT |
308 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, |
309 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); | |
1da177e4 LT |
310 | } |
311 | ||
312 | static int | |
a0d6f880 | 313 | snd_au1000_playback_close(struct snd_pcm_substream *substream) |
1da177e4 | 314 | { |
a0d6f880 | 315 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 316 | |
1da177e4 LT |
317 | au1000->stream[PLAYBACK]->substream = NULL; |
318 | return 0; | |
319 | } | |
320 | ||
321 | static int | |
a0d6f880 | 322 | snd_au1000_capture_close(struct snd_pcm_substream *substream) |
1da177e4 | 323 | { |
a0d6f880 | 324 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 325 | |
1da177e4 LT |
326 | au1000->stream[CAPTURE]->substream = NULL; |
327 | return 0; | |
328 | } | |
329 | ||
330 | static int | |
a0d6f880 TI |
331 | snd_au1000_hw_params(struct snd_pcm_substream *substream, |
332 | struct snd_pcm_hw_params *hw_params) | |
1da177e4 | 333 | { |
a0d6f880 | 334 | struct audio_stream *stream = substream->private_data; |
33ea25c1 TI |
335 | int err; |
336 | ||
337 | err = snd_pcm_lib_malloc_pages(substream, | |
338 | params_buffer_bytes(hw_params)); | |
339 | if (err < 0) | |
340 | return err; | |
341 | return au1000_setup_dma_link(stream, | |
342 | params_period_bytes(hw_params), | |
343 | params_periods(hw_params)); | |
1da177e4 LT |
344 | } |
345 | ||
346 | static int | |
a0d6f880 | 347 | snd_au1000_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 348 | { |
a0d6f880 | 349 | struct audio_stream *stream = substream->private_data; |
33ea25c1 | 350 | au1000_release_dma_link(stream); |
1da177e4 LT |
351 | return snd_pcm_lib_free_pages(substream); |
352 | } | |
353 | ||
354 | static int | |
a0d6f880 | 355 | snd_au1000_playback_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 356 | { |
a0d6f880 TI |
357 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
358 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 | 359 | |
33ea25c1 TI |
360 | if (runtime->channels == 1) |
361 | au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4); | |
1da177e4 | 362 | else |
33ea25c1 | 363 | au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4); |
1da177e4 LT |
364 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate); |
365 | return 0; | |
366 | } | |
367 | ||
368 | static int | |
a0d6f880 | 369 | snd_au1000_capture_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 370 | { |
a0d6f880 TI |
371 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
372 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 | 373 | |
33ea25c1 TI |
374 | if (runtime->channels == 1) |
375 | au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4); | |
1da177e4 | 376 | else |
33ea25c1 | 377 | au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4); |
1da177e4 LT |
378 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate); |
379 | return 0; | |
380 | } | |
381 | ||
382 | static int | |
a0d6f880 | 383 | snd_au1000_trigger(struct snd_pcm_substream *substream, int cmd) |
1da177e4 | 384 | { |
a0d6f880 | 385 | struct audio_stream *stream = substream->private_data; |
1da177e4 LT |
386 | int err = 0; |
387 | ||
33ea25c1 | 388 | spin_lock(&stream->dma_lock); |
1da177e4 LT |
389 | switch (cmd) { |
390 | case SNDRV_PCM_TRIGGER_START: | |
391 | au1000_dma_start(stream); | |
392 | break; | |
393 | case SNDRV_PCM_TRIGGER_STOP: | |
394 | au1000_dma_stop(stream); | |
395 | break; | |
396 | default: | |
397 | err = -EINVAL; | |
398 | break; | |
399 | } | |
33ea25c1 | 400 | spin_unlock(&stream->dma_lock); |
1da177e4 LT |
401 | return err; |
402 | } | |
403 | ||
404 | static snd_pcm_uframes_t | |
a0d6f880 | 405 | snd_au1000_pointer(struct snd_pcm_substream *substream) |
1da177e4 | 406 | { |
a0d6f880 TI |
407 | struct audio_stream *stream = substream->private_data; |
408 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
409 | long location; |
410 | ||
33ea25c1 | 411 | spin_lock(&stream->dma_lock); |
1da177e4 | 412 | location = get_dma_residue(stream->dma); |
33ea25c1 | 413 | spin_unlock(&stream->dma_lock); |
1da177e4 LT |
414 | location = stream->buffer->relative_end - location; |
415 | if (location == -1) | |
416 | location = 0; | |
417 | return bytes_to_frames(runtime,location); | |
418 | } | |
419 | ||
a0d6f880 | 420 | static struct snd_pcm_ops snd_card_au1000_playback_ops = { |
1da177e4 LT |
421 | .open = snd_au1000_playback_open, |
422 | .close = snd_au1000_playback_close, | |
423 | .ioctl = snd_pcm_lib_ioctl, | |
424 | .hw_params = snd_au1000_hw_params, | |
425 | .hw_free = snd_au1000_hw_free, | |
426 | .prepare = snd_au1000_playback_prepare, | |
427 | .trigger = snd_au1000_trigger, | |
428 | .pointer = snd_au1000_pointer, | |
429 | }; | |
430 | ||
a0d6f880 | 431 | static struct snd_pcm_ops snd_card_au1000_capture_ops = { |
1da177e4 LT |
432 | .open = snd_au1000_capture_open, |
433 | .close = snd_au1000_capture_close, | |
434 | .ioctl = snd_pcm_lib_ioctl, | |
435 | .hw_params = snd_au1000_hw_params, | |
436 | .hw_free = snd_au1000_hw_free, | |
437 | .prepare = snd_au1000_capture_prepare, | |
438 | .trigger = snd_au1000_trigger, | |
439 | .pointer = snd_au1000_pointer, | |
440 | }; | |
441 | ||
e0f8cb5f | 442 | static int |
a0d6f880 | 443 | snd_au1000_pcm_new(struct snd_au1000 *au1000) |
1da177e4 | 444 | { |
a0d6f880 | 445 | struct snd_pcm *pcm; |
1da177e4 LT |
446 | int err; |
447 | unsigned long flags; | |
448 | ||
449 | if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0) | |
450 | return err; | |
451 | ||
452 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, | |
453 | snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024); | |
454 | ||
455 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, | |
456 | &snd_card_au1000_playback_ops); | |
457 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, | |
458 | &snd_card_au1000_capture_ops); | |
459 | ||
460 | pcm->private_data = au1000; | |
461 | pcm->info_flags = 0; | |
462 | strcpy(pcm->name, "Au1000 AC97 PCM"); | |
463 | ||
33ea25c1 TI |
464 | spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock); |
465 | spin_lock_init(&au1000->stream[CAPTURE]->dma_lock); | |
466 | ||
1da177e4 LT |
467 | flags = claim_dma_lock(); |
468 | if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX, | |
88e24c3a | 469 | "AC97 TX", au1000_dma_interrupt, 0, |
1da177e4 LT |
470 | au1000->stream[PLAYBACK])) < 0) { |
471 | release_dma_lock(flags); | |
472 | return -EBUSY; | |
473 | } | |
474 | if ((au1000->stream[CAPTURE]->dma = request_au1000_dma(DMA_ID_AC97C_RX, | |
88e24c3a | 475 | "AC97 RX", au1000_dma_interrupt, 0, |
1da177e4 LT |
476 | au1000->stream[CAPTURE])) < 0){ |
477 | release_dma_lock(flags); | |
478 | return -EBUSY; | |
479 | } | |
480 | /* enable DMA coherency in read/write DMA channels */ | |
481 | set_dma_mode(au1000->stream[PLAYBACK]->dma, | |
482 | get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC); | |
483 | set_dma_mode(au1000->stream[CAPTURE]->dma, | |
484 | get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC); | |
485 | release_dma_lock(flags); | |
1da177e4 LT |
486 | au1000->pcm = pcm; |
487 | return 0; | |
488 | } | |
489 | ||
490 | ||
491 | /*-------------------------- AC97 CODEC Control ------------------------------*/ | |
492 | ||
493 | static unsigned short | |
a0d6f880 | 494 | snd_au1000_ac97_read(struct snd_ac97 *ac97, unsigned short reg) |
1da177e4 | 495 | { |
a0d6f880 | 496 | struct snd_au1000 *au1000 = ac97->private_data; |
1da177e4 LT |
497 | u32 volatile cmd; |
498 | u16 volatile data; | |
499 | int i; | |
33ea25c1 | 500 | |
708f9971 | 501 | spin_lock(&au1000->ac97_lock); |
3a4fa0a2 RD |
502 | /* would rather use the interrupt than this polling but it works and I can't |
503 | get the interrupt driven case to work efficiently */ | |
1da177e4 LT |
504 | for (i = 0; i < 0x5000; i++) |
505 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
506 | break; | |
507 | if (i == 0x5000) | |
508 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); | |
509 | ||
510 | cmd = (u32) reg & AC97C_INDEX_MASK; | |
511 | cmd |= AC97C_READ; | |
512 | au1000->ac97_ioport->cmd = cmd; | |
513 | ||
514 | /* now wait for the data */ | |
515 | for (i = 0; i < 0x5000; i++) | |
516 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
517 | break; | |
518 | if (i == 0x5000) { | |
519 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); | |
1efddcc9 | 520 | spin_unlock(&au1000->ac97_lock); |
1da177e4 LT |
521 | return 0; |
522 | } | |
523 | ||
524 | data = au1000->ac97_ioport->cmd & 0xffff; | |
708f9971 | 525 | spin_unlock(&au1000->ac97_lock); |
1da177e4 LT |
526 | |
527 | return data; | |
528 | ||
529 | } | |
530 | ||
531 | ||
532 | static void | |
a0d6f880 | 533 | snd_au1000_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) |
1da177e4 | 534 | { |
a0d6f880 | 535 | struct snd_au1000 *au1000 = ac97->private_data; |
1da177e4 LT |
536 | u32 cmd; |
537 | int i; | |
33ea25c1 | 538 | |
708f9971 | 539 | spin_lock(&au1000->ac97_lock); |
3a4fa0a2 RD |
540 | /* would rather use the interrupt than this polling but it works and I can't |
541 | get the interrupt driven case to work efficiently */ | |
1da177e4 LT |
542 | for (i = 0; i < 0x5000; i++) |
543 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
544 | break; | |
545 | if (i == 0x5000) | |
546 | printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n"); | |
547 | ||
548 | cmd = (u32) reg & AC97C_INDEX_MASK; | |
549 | cmd &= ~AC97C_READ; | |
550 | cmd |= ((u32) val << AC97C_WD_BIT); | |
551 | au1000->ac97_ioport->cmd = cmd; | |
708f9971 | 552 | spin_unlock(&au1000->ac97_lock); |
1da177e4 | 553 | } |
1da177e4 | 554 | |
e0f8cb5f | 555 | static int |
a0d6f880 | 556 | snd_au1000_ac97_new(struct snd_au1000 *au1000) |
1da177e4 LT |
557 | { |
558 | int err; | |
a0d6f880 TI |
559 | struct snd_ac97_bus *pbus; |
560 | struct snd_ac97_template ac97; | |
561 | static struct snd_ac97_bus_ops ops = { | |
562 | .write = snd_au1000_ac97_write, | |
563 | .read = snd_au1000_ac97_read, | |
564 | }; | |
1da177e4 | 565 | |
c5c079e3 SS |
566 | if ((au1000->ac97_res_port = request_mem_region(CPHYSADDR(AC97C_CONFIG), |
567 | 0x100000, "Au1x00 AC97")) == NULL) { | |
1da177e4 LT |
568 | snd_printk(KERN_ERR "ALSA AC97: can't grap AC97 port\n"); |
569 | return -EBUSY; | |
570 | } | |
c5c079e3 SS |
571 | au1000->ac97_ioport = (struct au1000_ac97_reg *) |
572 | KSEG1ADDR(au1000->ac97_res_port->start); | |
1da177e4 LT |
573 | |
574 | spin_lock_init(&au1000->ac97_lock); | |
575 | ||
1da177e4 LT |
576 | /* configure pins for AC'97 |
577 | TODO: move to board_setup.c */ | |
578 | au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC); | |
579 | ||
580 | /* Initialise Au1000's AC'97 Control Block */ | |
581 | au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE; | |
582 | udelay(10); | |
583 | au1000->ac97_ioport->cntrl = AC97C_CE; | |
584 | udelay(10); | |
585 | ||
586 | /* Initialise External CODEC -- cold reset */ | |
587 | au1000->ac97_ioport->config = AC97C_RESET; | |
588 | udelay(10); | |
589 | au1000->ac97_ioport->config = 0x0; | |
590 | mdelay(5); | |
591 | ||
1da177e4 | 592 | /* Initialise AC97 middle-layer */ |
1da177e4 LT |
593 | if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0) |
594 | return err; | |
33ea25c1 | 595 | |
1da177e4 LT |
596 | memset(&ac97, 0, sizeof(ac97)); |
597 | ac97.private_data = au1000; | |
1da177e4 LT |
598 | if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0) |
599 | return err; | |
1da177e4 | 600 | |
33ea25c1 | 601 | return 0; |
1da177e4 LT |
602 | } |
603 | ||
604 | /*------------------------------ Setup / Destroy ----------------------------*/ | |
605 | ||
606 | void | |
a0d6f880 | 607 | snd_au1000_free(struct snd_card *card) |
1da177e4 | 608 | { |
a0d6f880 | 609 | struct snd_au1000 *au1000 = card->private_data; |
1da177e4 LT |
610 | |
611 | if (au1000->ac97_res_port) { | |
612 | /* put internal AC97 block into reset */ | |
613 | au1000->ac97_ioport->cntrl = AC97C_RS; | |
614 | au1000->ac97_ioport = NULL; | |
b1d5776d | 615 | release_and_free_resource(au1000->ac97_res_port); |
1da177e4 LT |
616 | } |
617 | ||
bb160b85 SS |
618 | if (au1000->stream[PLAYBACK]) { |
619 | if (au1000->stream[PLAYBACK]->dma >= 0) | |
620 | free_au1000_dma(au1000->stream[PLAYBACK]->dma); | |
621 | kfree(au1000->stream[PLAYBACK]); | |
622 | } | |
1da177e4 | 623 | |
bb160b85 SS |
624 | if (au1000->stream[CAPTURE]) { |
625 | if (au1000->stream[CAPTURE]->dma >= 0) | |
626 | free_au1000_dma(au1000->stream[CAPTURE]->dma); | |
627 | kfree(au1000->stream[CAPTURE]); | |
628 | } | |
1da177e4 LT |
629 | } |
630 | ||
33ea25c1 | 631 | |
a0d6f880 | 632 | static struct snd_card *au1000_card; |
33ea25c1 | 633 | |
1da177e4 LT |
634 | static int __init |
635 | au1000_init(void) | |
636 | { | |
637 | int err; | |
a0d6f880 TI |
638 | struct snd_card *card; |
639 | struct snd_au1000 *au1000; | |
1da177e4 | 640 | |
bd7dd77c TI |
641 | err = snd_card_create(-1, "AC97", THIS_MODULE, |
642 | sizeof(struct snd_au1000), &card); | |
643 | if (err < 0) | |
644 | return err; | |
33ea25c1 TI |
645 | |
646 | card->private_free = snd_au1000_free; | |
647 | au1000 = card->private_data; | |
33ea25c1 | 648 | au1000->card = card; |
bb160b85 | 649 | |
a0d6f880 | 650 | au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL); |
bb160b85 SS |
651 | au1000->stream[CAPTURE ] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL); |
652 | /* so that snd_au1000_free will work as intended */ | |
653 | au1000->ac97_res_port = NULL; | |
654 | if (au1000->stream[PLAYBACK]) | |
655 | au1000->stream[PLAYBACK]->dma = -1; | |
656 | if (au1000->stream[CAPTURE ]) | |
657 | au1000->stream[CAPTURE ]->dma = -1; | |
658 | ||
33ea25c1 | 659 | if (au1000->stream[PLAYBACK] == NULL || |
bb160b85 | 660 | au1000->stream[CAPTURE ] == NULL) { |
33ea25c1 | 661 | snd_card_free(card); |
1da177e4 LT |
662 | return -ENOMEM; |
663 | } | |
664 | ||
33ea25c1 TI |
665 | if ((err = snd_au1000_ac97_new(au1000)) < 0 ) { |
666 | snd_card_free(card); | |
1da177e4 LT |
667 | return err; |
668 | } | |
669 | ||
33ea25c1 TI |
670 | if ((err = snd_au1000_pcm_new(au1000)) < 0) { |
671 | snd_card_free(card); | |
1da177e4 LT |
672 | return err; |
673 | } | |
674 | ||
33ea25c1 TI |
675 | strcpy(card->driver, "Au1000-AC97"); |
676 | strcpy(card->shortname, "AMD Au1000-AC97"); | |
677 | sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver"); | |
1da177e4 | 678 | |
33ea25c1 TI |
679 | if ((err = snd_card_register(card)) < 0) { |
680 | snd_card_free(card); | |
1da177e4 LT |
681 | return err; |
682 | } | |
683 | ||
2ebfb8ee | 684 | printk(KERN_INFO "ALSA AC97: Driver Initialized\n"); |
33ea25c1 | 685 | au1000_card = card; |
1da177e4 LT |
686 | return 0; |
687 | } | |
688 | ||
689 | static void __exit au1000_exit(void) | |
690 | { | |
33ea25c1 | 691 | snd_card_free(au1000_card); |
1da177e4 LT |
692 | } |
693 | ||
694 | module_init(au1000_init); | |
695 | module_exit(au1000_exit); | |
696 |