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> | |
1da177e4 LT |
41 | #include <sound/core.h> |
42 | #include <sound/initval.h> | |
43 | #include <sound/pcm.h> | |
d8327c78 | 44 | #include <sound/pcm_params.h> |
1da177e4 LT |
45 | #include <sound/ac97_codec.h> |
46 | #include <asm/mach-au1x00/au1000.h> | |
47 | #include <asm/mach-au1x00/au1000_dma.h> | |
48 | ||
49 | MODULE_AUTHOR("Charles Eidsness <charles@cooper-street.com>"); | |
50 | MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver"); | |
51 | MODULE_LICENSE("GPL"); | |
1da177e4 | 52 | MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}"); |
1da177e4 | 53 | |
1da177e4 LT |
54 | #define PLAYBACK 0 |
55 | #define CAPTURE 1 | |
56 | #define AC97_SLOT_3 0x01 | |
57 | #define AC97_SLOT_4 0x02 | |
58 | #define AC97_SLOT_6 0x08 | |
59 | #define AC97_CMD_IRQ 31 | |
60 | #define READ 0 | |
61 | #define WRITE 1 | |
62 | #define READ_WAIT 2 | |
63 | #define RW_DONE 3 | |
64 | ||
1da177e4 LT |
65 | struct au1000_period |
66 | { | |
67 | u32 start; | |
68 | u32 relative_end; /*realtive to start of buffer*/ | |
a0d6f880 | 69 | struct au1000_period * next; |
1da177e4 LT |
70 | }; |
71 | ||
72 | /*Au1000 AC97 Port Control Reisters*/ | |
1da177e4 LT |
73 | struct au1000_ac97_reg { |
74 | u32 volatile config; | |
75 | u32 volatile status; | |
76 | u32 volatile data; | |
77 | u32 volatile cmd; | |
78 | u32 volatile cntrl; | |
79 | }; | |
80 | ||
1da177e4 | 81 | struct audio_stream { |
a0d6f880 | 82 | struct snd_pcm_substream *substream; |
1da177e4 LT |
83 | int dma; |
84 | spinlock_t dma_lock; | |
a0d6f880 | 85 | struct au1000_period * buffer; |
33ea25c1 TI |
86 | unsigned int period_size; |
87 | unsigned int periods; | |
1da177e4 LT |
88 | }; |
89 | ||
a0d6f880 TI |
90 | struct snd_au1000 { |
91 | struct snd_card *card; | |
92 | struct au1000_ac97_reg volatile *ac97_ioport; | |
1da177e4 LT |
93 | |
94 | struct resource *ac97_res_port; | |
95 | spinlock_t ac97_lock; | |
a0d6f880 | 96 | struct snd_ac97 *ac97; |
1da177e4 | 97 | |
a0d6f880 TI |
98 | struct snd_pcm *pcm; |
99 | struct audio_stream *stream[2]; /* playback & capture */ | |
100 | }; | |
1da177e4 | 101 | |
1da177e4 LT |
102 | /*--------------------------- Local Functions --------------------------------*/ |
103 | static void | |
a0d6f880 | 104 | au1000_set_ac97_xmit_slots(struct snd_au1000 *au1000, long xmit_slots) |
1da177e4 LT |
105 | { |
106 | u32 volatile ac97_config; | |
107 | ||
108 | spin_lock(&au1000->ac97_lock); | |
109 | ac97_config = au1000->ac97_ioport->config; | |
110 | ac97_config = ac97_config & ~AC97C_XMIT_SLOTS_MASK; | |
111 | ac97_config |= (xmit_slots << AC97C_XMIT_SLOTS_BIT); | |
112 | au1000->ac97_ioport->config = ac97_config; | |
113 | spin_unlock(&au1000->ac97_lock); | |
114 | } | |
115 | ||
116 | static void | |
a0d6f880 | 117 | au1000_set_ac97_recv_slots(struct snd_au1000 *au1000, long recv_slots) |
1da177e4 LT |
118 | { |
119 | u32 volatile ac97_config; | |
120 | ||
121 | spin_lock(&au1000->ac97_lock); | |
122 | ac97_config = au1000->ac97_ioport->config; | |
123 | ac97_config = ac97_config & ~AC97C_RECV_SLOTS_MASK; | |
124 | ac97_config |= (recv_slots << AC97C_RECV_SLOTS_BIT); | |
125 | au1000->ac97_ioport->config = ac97_config; | |
126 | spin_unlock(&au1000->ac97_lock); | |
127 | } | |
128 | ||
129 | ||
130 | static void | |
a0d6f880 | 131 | au1000_release_dma_link(struct audio_stream *stream) |
1da177e4 | 132 | { |
a0d6f880 TI |
133 | struct au1000_period * pointer; |
134 | struct au1000_period * pointer_next; | |
1da177e4 | 135 | |
33ea25c1 TI |
136 | stream->period_size = 0; |
137 | stream->periods = 0; | |
138 | pointer = stream->buffer; | |
139 | if (! pointer) | |
140 | return; | |
141 | do { | |
142 | pointer_next = pointer->next; | |
143 | kfree(pointer); | |
144 | pointer = pointer_next; | |
145 | } while (pointer != stream->buffer); | |
146 | stream->buffer = NULL; | |
147 | } | |
148 | ||
149 | static int | |
a0d6f880 | 150 | au1000_setup_dma_link(struct audio_stream *stream, unsigned int period_bytes, |
33ea25c1 TI |
151 | unsigned int periods) |
152 | { | |
a0d6f880 TI |
153 | struct snd_pcm_substream *substream = stream->substream; |
154 | struct snd_pcm_runtime *runtime = substream->runtime; | |
d8327c78 | 155 | struct au1000_period *pointer; |
33ea25c1 TI |
156 | unsigned long dma_start; |
157 | int i; | |
158 | ||
159 | dma_start = virt_to_phys(runtime->dma_area); | |
1da177e4 | 160 | |
33ea25c1 TI |
161 | if (stream->period_size == period_bytes && |
162 | stream->periods == periods) | |
163 | return 0; /* not changed */ | |
1da177e4 | 164 | |
33ea25c1 | 165 | au1000_release_dma_link(stream); |
1da177e4 | 166 | |
33ea25c1 TI |
167 | stream->period_size = period_bytes; |
168 | stream->periods = periods; | |
169 | ||
a0d6f880 | 170 | stream->buffer = kmalloc(sizeof(struct au1000_period), GFP_KERNEL); |
33ea25c1 TI |
171 | if (! stream->buffer) |
172 | return -ENOMEM; | |
173 | pointer = stream->buffer; | |
174 | for (i = 0; i < periods; i++) { | |
175 | pointer->start = (u32)(dma_start + (i * period_bytes)); | |
176 | pointer->relative_end = (u32) (((i+1) * period_bytes) - 0x1); | |
177 | if (i < periods - 1) { | |
178 | pointer->next = kmalloc(sizeof(struct au1000_period), GFP_KERNEL); | |
179 | if (! pointer->next) { | |
180 | au1000_release_dma_link(stream); | |
181 | return -ENOMEM; | |
182 | } | |
183 | pointer = pointer->next; | |
184 | } | |
1da177e4 | 185 | } |
33ea25c1 TI |
186 | pointer->next = stream->buffer; |
187 | return 0; | |
1da177e4 LT |
188 | } |
189 | ||
190 | static void | |
a0d6f880 | 191 | au1000_dma_stop(struct audio_stream *stream) |
1da177e4 | 192 | { |
33ea25c1 TI |
193 | snd_assert(stream->buffer, return); |
194 | disable_dma(stream->dma); | |
195 | } | |
1da177e4 | 196 | |
33ea25c1 | 197 | static void |
a0d6f880 | 198 | au1000_dma_start(struct audio_stream *stream) |
33ea25c1 TI |
199 | { |
200 | snd_assert(stream->buffer, return); | |
1da177e4 | 201 | |
33ea25c1 TI |
202 | init_dma(stream->dma); |
203 | if (get_dma_active_buffer(stream->dma) == 0) { | |
204 | clear_dma_done0(stream->dma); | |
205 | set_dma_addr0(stream->dma, stream->buffer->start); | |
206 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
207 | set_dma_addr1(stream->dma, stream->buffer->next->start); | |
208 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
209 | } else { | |
210 | clear_dma_done1(stream->dma); | |
211 | set_dma_addr1(stream->dma, stream->buffer->start); | |
212 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
213 | set_dma_addr0(stream->dma, stream->buffer->next->start); | |
214 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
1da177e4 | 215 | } |
33ea25c1 TI |
216 | enable_dma_buffers(stream->dma); |
217 | start_dma(stream->dma); | |
1da177e4 LT |
218 | } |
219 | ||
220 | static irqreturn_t | |
7d12e780 | 221 | au1000_dma_interrupt(int irq, void *dev_id) |
1da177e4 | 222 | { |
a0d6f880 TI |
223 | struct audio_stream *stream = (struct audio_stream *) dev_id; |
224 | struct snd_pcm_substream *substream = stream->substream; | |
1da177e4 LT |
225 | |
226 | spin_lock(&stream->dma_lock); | |
227 | switch (get_dma_buffer_done(stream->dma)) { | |
228 | case DMA_D0: | |
229 | stream->buffer = stream->buffer->next; | |
230 | clear_dma_done0(stream->dma); | |
231 | set_dma_addr0(stream->dma, stream->buffer->next->start); | |
232 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
233 | enable_dma_buffer0(stream->dma); | |
234 | break; | |
235 | case DMA_D1: | |
236 | stream->buffer = stream->buffer->next; | |
237 | clear_dma_done1(stream->dma); | |
238 | set_dma_addr1(stream->dma, stream->buffer->next->start); | |
239 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
240 | enable_dma_buffer1(stream->dma); | |
241 | break; | |
242 | case (DMA_D0 | DMA_D1): | |
1da177e4 LT |
243 | printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma); |
244 | au1000_dma_stop(stream); | |
245 | au1000_dma_start(stream); | |
1da177e4 LT |
246 | break; |
247 | case (~DMA_D0 & ~DMA_D1): | |
248 | printk(KERN_ERR "DMA %d empty irq.\n",stream->dma); | |
249 | } | |
250 | spin_unlock(&stream->dma_lock); | |
251 | snd_pcm_period_elapsed(substream); | |
252 | return IRQ_HANDLED; | |
253 | } | |
254 | ||
255 | /*-------------------------- PCM Audio Streams -------------------------------*/ | |
256 | ||
257 | static unsigned int rates[] = {8000, 11025, 16000, 22050}; | |
a0d6f880 | 258 | static struct snd_pcm_hw_constraint_list hw_constraints_rates = { |
2ad3479d | 259 | .count = ARRAY_SIZE(rates), |
1da177e4 LT |
260 | .list = rates, |
261 | .mask = 0, | |
262 | }; | |
263 | ||
a0d6f880 | 264 | static struct snd_pcm_hardware snd_au1000_hw = |
1da177e4 LT |
265 | { |
266 | .info = (SNDRV_PCM_INFO_INTERLEAVED | \ | |
267 | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID), | |
268 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
269 | .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | | |
270 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050), | |
271 | .rate_min = 8000, | |
272 | .rate_max = 22050, | |
273 | .channels_min = 1, | |
274 | .channels_max = 2, | |
275 | .buffer_bytes_max = 128*1024, | |
276 | .period_bytes_min = 32, | |
277 | .period_bytes_max = 16*1024, | |
278 | .periods_min = 8, | |
279 | .periods_max = 255, | |
280 | .fifo_size = 16, | |
281 | }; | |
282 | ||
283 | static int | |
a0d6f880 | 284 | snd_au1000_playback_open(struct snd_pcm_substream *substream) |
1da177e4 | 285 | { |
a0d6f880 | 286 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 287 | |
1da177e4 LT |
288 | au1000->stream[PLAYBACK]->substream = substream; |
289 | au1000->stream[PLAYBACK]->buffer = NULL; | |
290 | substream->private_data = au1000->stream[PLAYBACK]; | |
33ea25c1 | 291 | substream->runtime->hw = snd_au1000_hw; |
1da177e4 LT |
292 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, |
293 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); | |
294 | } | |
295 | ||
296 | static int | |
a0d6f880 | 297 | snd_au1000_capture_open(struct snd_pcm_substream *substream) |
1da177e4 | 298 | { |
a0d6f880 | 299 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 300 | |
1da177e4 LT |
301 | au1000->stream[CAPTURE]->substream = substream; |
302 | au1000->stream[CAPTURE]->buffer = NULL; | |
303 | substream->private_data = au1000->stream[CAPTURE]; | |
33ea25c1 | 304 | substream->runtime->hw = snd_au1000_hw; |
1da177e4 LT |
305 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, |
306 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); | |
1da177e4 LT |
307 | } |
308 | ||
309 | static int | |
a0d6f880 | 310 | snd_au1000_playback_close(struct snd_pcm_substream *substream) |
1da177e4 | 311 | { |
a0d6f880 | 312 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 313 | |
1da177e4 LT |
314 | au1000->stream[PLAYBACK]->substream = NULL; |
315 | return 0; | |
316 | } | |
317 | ||
318 | static int | |
a0d6f880 | 319 | snd_au1000_capture_close(struct snd_pcm_substream *substream) |
1da177e4 | 320 | { |
a0d6f880 | 321 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 322 | |
1da177e4 LT |
323 | au1000->stream[CAPTURE]->substream = NULL; |
324 | return 0; | |
325 | } | |
326 | ||
327 | static int | |
a0d6f880 TI |
328 | snd_au1000_hw_params(struct snd_pcm_substream *substream, |
329 | struct snd_pcm_hw_params *hw_params) | |
1da177e4 | 330 | { |
a0d6f880 | 331 | struct audio_stream *stream = substream->private_data; |
33ea25c1 TI |
332 | int err; |
333 | ||
334 | err = snd_pcm_lib_malloc_pages(substream, | |
335 | params_buffer_bytes(hw_params)); | |
336 | if (err < 0) | |
337 | return err; | |
338 | return au1000_setup_dma_link(stream, | |
339 | params_period_bytes(hw_params), | |
340 | params_periods(hw_params)); | |
1da177e4 LT |
341 | } |
342 | ||
343 | static int | |
a0d6f880 | 344 | snd_au1000_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 345 | { |
a0d6f880 | 346 | struct audio_stream *stream = substream->private_data; |
33ea25c1 | 347 | au1000_release_dma_link(stream); |
1da177e4 LT |
348 | return snd_pcm_lib_free_pages(substream); |
349 | } | |
350 | ||
351 | static int | |
a0d6f880 | 352 | snd_au1000_playback_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 353 | { |
a0d6f880 TI |
354 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
355 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 | 356 | |
33ea25c1 TI |
357 | if (runtime->channels == 1) |
358 | au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4); | |
1da177e4 | 359 | else |
33ea25c1 | 360 | au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4); |
1da177e4 LT |
361 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate); |
362 | return 0; | |
363 | } | |
364 | ||
365 | static int | |
a0d6f880 | 366 | snd_au1000_capture_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 367 | { |
a0d6f880 TI |
368 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
369 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 | 370 | |
33ea25c1 TI |
371 | if (runtime->channels == 1) |
372 | au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4); | |
1da177e4 | 373 | else |
33ea25c1 | 374 | au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4); |
1da177e4 LT |
375 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate); |
376 | return 0; | |
377 | } | |
378 | ||
379 | static int | |
a0d6f880 | 380 | snd_au1000_trigger(struct snd_pcm_substream *substream, int cmd) |
1da177e4 | 381 | { |
a0d6f880 | 382 | struct audio_stream *stream = substream->private_data; |
1da177e4 LT |
383 | int err = 0; |
384 | ||
33ea25c1 | 385 | spin_lock(&stream->dma_lock); |
1da177e4 LT |
386 | switch (cmd) { |
387 | case SNDRV_PCM_TRIGGER_START: | |
388 | au1000_dma_start(stream); | |
389 | break; | |
390 | case SNDRV_PCM_TRIGGER_STOP: | |
391 | au1000_dma_stop(stream); | |
392 | break; | |
393 | default: | |
394 | err = -EINVAL; | |
395 | break; | |
396 | } | |
33ea25c1 | 397 | spin_unlock(&stream->dma_lock); |
1da177e4 LT |
398 | return err; |
399 | } | |
400 | ||
401 | static snd_pcm_uframes_t | |
a0d6f880 | 402 | snd_au1000_pointer(struct snd_pcm_substream *substream) |
1da177e4 | 403 | { |
a0d6f880 TI |
404 | struct audio_stream *stream = substream->private_data; |
405 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
406 | long location; |
407 | ||
33ea25c1 | 408 | spin_lock(&stream->dma_lock); |
1da177e4 | 409 | location = get_dma_residue(stream->dma); |
33ea25c1 | 410 | spin_unlock(&stream->dma_lock); |
1da177e4 LT |
411 | location = stream->buffer->relative_end - location; |
412 | if (location == -1) | |
413 | location = 0; | |
414 | return bytes_to_frames(runtime,location); | |
415 | } | |
416 | ||
a0d6f880 | 417 | static struct snd_pcm_ops snd_card_au1000_playback_ops = { |
1da177e4 LT |
418 | .open = snd_au1000_playback_open, |
419 | .close = snd_au1000_playback_close, | |
420 | .ioctl = snd_pcm_lib_ioctl, | |
421 | .hw_params = snd_au1000_hw_params, | |
422 | .hw_free = snd_au1000_hw_free, | |
423 | .prepare = snd_au1000_playback_prepare, | |
424 | .trigger = snd_au1000_trigger, | |
425 | .pointer = snd_au1000_pointer, | |
426 | }; | |
427 | ||
a0d6f880 | 428 | static struct snd_pcm_ops snd_card_au1000_capture_ops = { |
1da177e4 LT |
429 | .open = snd_au1000_capture_open, |
430 | .close = snd_au1000_capture_close, | |
431 | .ioctl = snd_pcm_lib_ioctl, | |
432 | .hw_params = snd_au1000_hw_params, | |
433 | .hw_free = snd_au1000_hw_free, | |
434 | .prepare = snd_au1000_capture_prepare, | |
435 | .trigger = snd_au1000_trigger, | |
436 | .pointer = snd_au1000_pointer, | |
437 | }; | |
438 | ||
439 | static int __devinit | |
a0d6f880 | 440 | snd_au1000_pcm_new(struct snd_au1000 *au1000) |
1da177e4 | 441 | { |
a0d6f880 | 442 | struct snd_pcm *pcm; |
1da177e4 LT |
443 | int err; |
444 | unsigned long flags; | |
445 | ||
446 | if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0) | |
447 | return err; | |
448 | ||
449 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, | |
450 | snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024); | |
451 | ||
452 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, | |
453 | &snd_card_au1000_playback_ops); | |
454 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, | |
455 | &snd_card_au1000_capture_ops); | |
456 | ||
457 | pcm->private_data = au1000; | |
458 | pcm->info_flags = 0; | |
459 | strcpy(pcm->name, "Au1000 AC97 PCM"); | |
460 | ||
33ea25c1 TI |
461 | spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock); |
462 | spin_lock_init(&au1000->stream[CAPTURE]->dma_lock); | |
463 | ||
1da177e4 LT |
464 | flags = claim_dma_lock(); |
465 | if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX, | |
65ca68b3 | 466 | "AC97 TX", au1000_dma_interrupt, IRQF_DISABLED, |
1da177e4 LT |
467 | au1000->stream[PLAYBACK])) < 0) { |
468 | release_dma_lock(flags); | |
469 | return -EBUSY; | |
470 | } | |
471 | if ((au1000->stream[CAPTURE]->dma = request_au1000_dma(DMA_ID_AC97C_RX, | |
65ca68b3 | 472 | "AC97 RX", au1000_dma_interrupt, IRQF_DISABLED, |
1da177e4 LT |
473 | au1000->stream[CAPTURE])) < 0){ |
474 | release_dma_lock(flags); | |
475 | return -EBUSY; | |
476 | } | |
477 | /* enable DMA coherency in read/write DMA channels */ | |
478 | set_dma_mode(au1000->stream[PLAYBACK]->dma, | |
479 | get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC); | |
480 | set_dma_mode(au1000->stream[CAPTURE]->dma, | |
481 | get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC); | |
482 | release_dma_lock(flags); | |
1da177e4 LT |
483 | au1000->pcm = pcm; |
484 | return 0; | |
485 | } | |
486 | ||
487 | ||
488 | /*-------------------------- AC97 CODEC Control ------------------------------*/ | |
489 | ||
490 | static unsigned short | |
a0d6f880 | 491 | snd_au1000_ac97_read(struct snd_ac97 *ac97, unsigned short reg) |
1da177e4 | 492 | { |
a0d6f880 | 493 | struct snd_au1000 *au1000 = ac97->private_data; |
1da177e4 LT |
494 | u32 volatile cmd; |
495 | u16 volatile data; | |
496 | int i; | |
33ea25c1 | 497 | |
708f9971 | 498 | spin_lock(&au1000->ac97_lock); |
3a4fa0a2 RD |
499 | /* would rather use the interrupt than this polling but it works and I can't |
500 | get the interrupt driven case to work efficiently */ | |
1da177e4 LT |
501 | for (i = 0; i < 0x5000; i++) |
502 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
503 | break; | |
504 | if (i == 0x5000) | |
505 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); | |
506 | ||
507 | cmd = (u32) reg & AC97C_INDEX_MASK; | |
508 | cmd |= AC97C_READ; | |
509 | au1000->ac97_ioport->cmd = cmd; | |
510 | ||
511 | /* now wait for the data */ | |
512 | for (i = 0; i < 0x5000; i++) | |
513 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
514 | break; | |
515 | if (i == 0x5000) { | |
516 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); | |
517 | return 0; | |
518 | } | |
519 | ||
520 | data = au1000->ac97_ioport->cmd & 0xffff; | |
708f9971 | 521 | spin_unlock(&au1000->ac97_lock); |
1da177e4 LT |
522 | |
523 | return data; | |
524 | ||
525 | } | |
526 | ||
527 | ||
528 | static void | |
a0d6f880 | 529 | snd_au1000_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) |
1da177e4 | 530 | { |
a0d6f880 | 531 | struct snd_au1000 *au1000 = ac97->private_data; |
1da177e4 LT |
532 | u32 cmd; |
533 | int i; | |
33ea25c1 | 534 | |
708f9971 | 535 | spin_lock(&au1000->ac97_lock); |
3a4fa0a2 RD |
536 | /* would rather use the interrupt than this polling but it works and I can't |
537 | get the interrupt driven case to work efficiently */ | |
1da177e4 LT |
538 | for (i = 0; i < 0x5000; i++) |
539 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
540 | break; | |
541 | if (i == 0x5000) | |
542 | printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n"); | |
543 | ||
544 | cmd = (u32) reg & AC97C_INDEX_MASK; | |
545 | cmd &= ~AC97C_READ; | |
546 | cmd |= ((u32) val << AC97C_WD_BIT); | |
547 | au1000->ac97_ioport->cmd = cmd; | |
708f9971 | 548 | spin_unlock(&au1000->ac97_lock); |
1da177e4 | 549 | } |
1da177e4 LT |
550 | |
551 | static int __devinit | |
a0d6f880 | 552 | snd_au1000_ac97_new(struct snd_au1000 *au1000) |
1da177e4 LT |
553 | { |
554 | int err; | |
a0d6f880 TI |
555 | struct snd_ac97_bus *pbus; |
556 | struct snd_ac97_template ac97; | |
557 | static struct snd_ac97_bus_ops ops = { | |
558 | .write = snd_au1000_ac97_write, | |
559 | .read = snd_au1000_ac97_read, | |
560 | }; | |
1da177e4 | 561 | |
c5c079e3 SS |
562 | if ((au1000->ac97_res_port = request_mem_region(CPHYSADDR(AC97C_CONFIG), |
563 | 0x100000, "Au1x00 AC97")) == NULL) { | |
1da177e4 LT |
564 | snd_printk(KERN_ERR "ALSA AC97: can't grap AC97 port\n"); |
565 | return -EBUSY; | |
566 | } | |
c5c079e3 SS |
567 | au1000->ac97_ioport = (struct au1000_ac97_reg *) |
568 | KSEG1ADDR(au1000->ac97_res_port->start); | |
1da177e4 LT |
569 | |
570 | spin_lock_init(&au1000->ac97_lock); | |
571 | ||
1da177e4 LT |
572 | /* configure pins for AC'97 |
573 | TODO: move to board_setup.c */ | |
574 | au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC); | |
575 | ||
576 | /* Initialise Au1000's AC'97 Control Block */ | |
577 | au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE; | |
578 | udelay(10); | |
579 | au1000->ac97_ioport->cntrl = AC97C_CE; | |
580 | udelay(10); | |
581 | ||
582 | /* Initialise External CODEC -- cold reset */ | |
583 | au1000->ac97_ioport->config = AC97C_RESET; | |
584 | udelay(10); | |
585 | au1000->ac97_ioport->config = 0x0; | |
586 | mdelay(5); | |
587 | ||
1da177e4 | 588 | /* Initialise AC97 middle-layer */ |
1da177e4 LT |
589 | if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0) |
590 | return err; | |
33ea25c1 | 591 | |
1da177e4 LT |
592 | memset(&ac97, 0, sizeof(ac97)); |
593 | ac97.private_data = au1000; | |
1da177e4 LT |
594 | if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0) |
595 | return err; | |
1da177e4 | 596 | |
33ea25c1 | 597 | return 0; |
1da177e4 LT |
598 | } |
599 | ||
600 | /*------------------------------ Setup / Destroy ----------------------------*/ | |
601 | ||
602 | void | |
a0d6f880 | 603 | snd_au1000_free(struct snd_card *card) |
1da177e4 | 604 | { |
a0d6f880 | 605 | struct snd_au1000 *au1000 = card->private_data; |
1da177e4 LT |
606 | |
607 | if (au1000->ac97_res_port) { | |
608 | /* put internal AC97 block into reset */ | |
609 | au1000->ac97_ioport->cntrl = AC97C_RS; | |
610 | au1000->ac97_ioport = NULL; | |
b1d5776d | 611 | release_and_free_resource(au1000->ac97_res_port); |
1da177e4 LT |
612 | } |
613 | ||
bb160b85 SS |
614 | if (au1000->stream[PLAYBACK]) { |
615 | if (au1000->stream[PLAYBACK]->dma >= 0) | |
616 | free_au1000_dma(au1000->stream[PLAYBACK]->dma); | |
617 | kfree(au1000->stream[PLAYBACK]); | |
618 | } | |
1da177e4 | 619 | |
bb160b85 SS |
620 | if (au1000->stream[CAPTURE]) { |
621 | if (au1000->stream[CAPTURE]->dma >= 0) | |
622 | free_au1000_dma(au1000->stream[CAPTURE]->dma); | |
623 | kfree(au1000->stream[CAPTURE]); | |
624 | } | |
1da177e4 LT |
625 | } |
626 | ||
33ea25c1 | 627 | |
a0d6f880 | 628 | static struct snd_card *au1000_card; |
33ea25c1 | 629 | |
1da177e4 LT |
630 | static int __init |
631 | au1000_init(void) | |
632 | { | |
633 | int err; | |
a0d6f880 TI |
634 | struct snd_card *card; |
635 | struct snd_au1000 *au1000; | |
1da177e4 | 636 | |
a0d6f880 | 637 | card = snd_card_new(-1, "AC97", THIS_MODULE, sizeof(struct snd_au1000)); |
33ea25c1 | 638 | if (card == NULL) |
1da177e4 | 639 | return -ENOMEM; |
33ea25c1 TI |
640 | |
641 | card->private_free = snd_au1000_free; | |
642 | au1000 = card->private_data; | |
33ea25c1 | 643 | au1000->card = card; |
bb160b85 | 644 | |
a0d6f880 | 645 | au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL); |
bb160b85 SS |
646 | au1000->stream[CAPTURE ] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL); |
647 | /* so that snd_au1000_free will work as intended */ | |
648 | au1000->ac97_res_port = NULL; | |
649 | if (au1000->stream[PLAYBACK]) | |
650 | au1000->stream[PLAYBACK]->dma = -1; | |
651 | if (au1000->stream[CAPTURE ]) | |
652 | au1000->stream[CAPTURE ]->dma = -1; | |
653 | ||
33ea25c1 | 654 | if (au1000->stream[PLAYBACK] == NULL || |
bb160b85 | 655 | au1000->stream[CAPTURE ] == NULL) { |
33ea25c1 | 656 | snd_card_free(card); |
1da177e4 LT |
657 | return -ENOMEM; |
658 | } | |
659 | ||
33ea25c1 TI |
660 | if ((err = snd_au1000_ac97_new(au1000)) < 0 ) { |
661 | snd_card_free(card); | |
1da177e4 LT |
662 | return err; |
663 | } | |
664 | ||
33ea25c1 TI |
665 | if ((err = snd_au1000_pcm_new(au1000)) < 0) { |
666 | snd_card_free(card); | |
1da177e4 LT |
667 | return err; |
668 | } | |
669 | ||
33ea25c1 TI |
670 | strcpy(card->driver, "Au1000-AC97"); |
671 | strcpy(card->shortname, "AMD Au1000-AC97"); | |
672 | sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver"); | |
1da177e4 | 673 | |
33ea25c1 TI |
674 | if ((err = snd_card_register(card)) < 0) { |
675 | snd_card_free(card); | |
1da177e4 LT |
676 | return err; |
677 | } | |
678 | ||
679 | printk( KERN_INFO "ALSA AC97: Driver Initialized\n" ); | |
33ea25c1 | 680 | au1000_card = card; |
1da177e4 LT |
681 | return 0; |
682 | } | |
683 | ||
684 | static void __exit au1000_exit(void) | |
685 | { | |
33ea25c1 | 686 | snd_card_free(au1000_card); |
1da177e4 LT |
687 | } |
688 | ||
689 | module_init(au1000_init); | |
690 | module_exit(au1000_exit); | |
691 |