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> | |
41 | #include <linux/version.h> | |
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 | { |
33ea25c1 TI |
194 | snd_assert(stream->buffer, return); |
195 | disable_dma(stream->dma); | |
196 | } | |
1da177e4 | 197 | |
33ea25c1 | 198 | static void |
a0d6f880 | 199 | au1000_dma_start(struct audio_stream *stream) |
33ea25c1 TI |
200 | { |
201 | snd_assert(stream->buffer, return); | |
1da177e4 | 202 | |
33ea25c1 TI |
203 | init_dma(stream->dma); |
204 | if (get_dma_active_buffer(stream->dma) == 0) { | |
205 | clear_dma_done0(stream->dma); | |
206 | set_dma_addr0(stream->dma, stream->buffer->start); | |
207 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
208 | set_dma_addr1(stream->dma, stream->buffer->next->start); | |
209 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
210 | } else { | |
211 | clear_dma_done1(stream->dma); | |
212 | set_dma_addr1(stream->dma, stream->buffer->start); | |
213 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
214 | set_dma_addr0(stream->dma, stream->buffer->next->start); | |
215 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
1da177e4 | 216 | } |
33ea25c1 TI |
217 | enable_dma_buffers(stream->dma); |
218 | start_dma(stream->dma); | |
1da177e4 LT |
219 | } |
220 | ||
221 | static irqreturn_t | |
7d12e780 | 222 | au1000_dma_interrupt(int irq, void *dev_id) |
1da177e4 | 223 | { |
a0d6f880 TI |
224 | struct audio_stream *stream = (struct audio_stream *) dev_id; |
225 | struct snd_pcm_substream *substream = stream->substream; | |
1da177e4 LT |
226 | |
227 | spin_lock(&stream->dma_lock); | |
228 | switch (get_dma_buffer_done(stream->dma)) { | |
229 | case DMA_D0: | |
230 | stream->buffer = stream->buffer->next; | |
231 | clear_dma_done0(stream->dma); | |
232 | set_dma_addr0(stream->dma, stream->buffer->next->start); | |
233 | set_dma_count0(stream->dma, stream->period_size >> 1); | |
234 | enable_dma_buffer0(stream->dma); | |
235 | break; | |
236 | case DMA_D1: | |
237 | stream->buffer = stream->buffer->next; | |
238 | clear_dma_done1(stream->dma); | |
239 | set_dma_addr1(stream->dma, stream->buffer->next->start); | |
240 | set_dma_count1(stream->dma, stream->period_size >> 1); | |
241 | enable_dma_buffer1(stream->dma); | |
242 | break; | |
243 | case (DMA_D0 | DMA_D1): | |
1da177e4 LT |
244 | printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma); |
245 | au1000_dma_stop(stream); | |
246 | au1000_dma_start(stream); | |
1da177e4 LT |
247 | break; |
248 | case (~DMA_D0 & ~DMA_D1): | |
249 | printk(KERN_ERR "DMA %d empty irq.\n",stream->dma); | |
250 | } | |
251 | spin_unlock(&stream->dma_lock); | |
252 | snd_pcm_period_elapsed(substream); | |
253 | return IRQ_HANDLED; | |
254 | } | |
255 | ||
256 | /*-------------------------- PCM Audio Streams -------------------------------*/ | |
257 | ||
258 | static unsigned int rates[] = {8000, 11025, 16000, 22050}; | |
a0d6f880 | 259 | static struct snd_pcm_hw_constraint_list hw_constraints_rates = { |
2ad3479d | 260 | .count = ARRAY_SIZE(rates), |
1da177e4 LT |
261 | .list = rates, |
262 | .mask = 0, | |
263 | }; | |
264 | ||
a0d6f880 | 265 | static struct snd_pcm_hardware snd_au1000_hw = |
1da177e4 LT |
266 | { |
267 | .info = (SNDRV_PCM_INFO_INTERLEAVED | \ | |
268 | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID), | |
269 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
270 | .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | | |
271 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050), | |
272 | .rate_min = 8000, | |
273 | .rate_max = 22050, | |
274 | .channels_min = 1, | |
275 | .channels_max = 2, | |
276 | .buffer_bytes_max = 128*1024, | |
277 | .period_bytes_min = 32, | |
278 | .period_bytes_max = 16*1024, | |
279 | .periods_min = 8, | |
280 | .periods_max = 255, | |
281 | .fifo_size = 16, | |
282 | }; | |
283 | ||
284 | static int | |
a0d6f880 | 285 | snd_au1000_playback_open(struct snd_pcm_substream *substream) |
1da177e4 | 286 | { |
a0d6f880 | 287 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 288 | |
1da177e4 LT |
289 | au1000->stream[PLAYBACK]->substream = substream; |
290 | au1000->stream[PLAYBACK]->buffer = NULL; | |
291 | substream->private_data = au1000->stream[PLAYBACK]; | |
33ea25c1 | 292 | substream->runtime->hw = snd_au1000_hw; |
1da177e4 LT |
293 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, |
294 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); | |
295 | } | |
296 | ||
297 | static int | |
a0d6f880 | 298 | snd_au1000_capture_open(struct snd_pcm_substream *substream) |
1da177e4 | 299 | { |
a0d6f880 | 300 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 301 | |
1da177e4 LT |
302 | au1000->stream[CAPTURE]->substream = substream; |
303 | au1000->stream[CAPTURE]->buffer = NULL; | |
304 | substream->private_data = au1000->stream[CAPTURE]; | |
33ea25c1 | 305 | substream->runtime->hw = snd_au1000_hw; |
1da177e4 LT |
306 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, |
307 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); | |
1da177e4 LT |
308 | } |
309 | ||
310 | static int | |
a0d6f880 | 311 | snd_au1000_playback_close(struct snd_pcm_substream *substream) |
1da177e4 | 312 | { |
a0d6f880 | 313 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 314 | |
1da177e4 LT |
315 | au1000->stream[PLAYBACK]->substream = NULL; |
316 | return 0; | |
317 | } | |
318 | ||
319 | static int | |
a0d6f880 | 320 | snd_au1000_capture_close(struct snd_pcm_substream *substream) |
1da177e4 | 321 | { |
a0d6f880 | 322 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
33ea25c1 | 323 | |
1da177e4 LT |
324 | au1000->stream[CAPTURE]->substream = NULL; |
325 | return 0; | |
326 | } | |
327 | ||
328 | static int | |
a0d6f880 TI |
329 | snd_au1000_hw_params(struct snd_pcm_substream *substream, |
330 | struct snd_pcm_hw_params *hw_params) | |
1da177e4 | 331 | { |
a0d6f880 | 332 | struct audio_stream *stream = substream->private_data; |
33ea25c1 TI |
333 | int err; |
334 | ||
335 | err = snd_pcm_lib_malloc_pages(substream, | |
336 | params_buffer_bytes(hw_params)); | |
337 | if (err < 0) | |
338 | return err; | |
339 | return au1000_setup_dma_link(stream, | |
340 | params_period_bytes(hw_params), | |
341 | params_periods(hw_params)); | |
1da177e4 LT |
342 | } |
343 | ||
344 | static int | |
a0d6f880 | 345 | snd_au1000_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 346 | { |
a0d6f880 | 347 | struct audio_stream *stream = substream->private_data; |
33ea25c1 | 348 | au1000_release_dma_link(stream); |
1da177e4 LT |
349 | return snd_pcm_lib_free_pages(substream); |
350 | } | |
351 | ||
352 | static int | |
a0d6f880 | 353 | snd_au1000_playback_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 354 | { |
a0d6f880 TI |
355 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
356 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 | 357 | |
33ea25c1 TI |
358 | if (runtime->channels == 1) |
359 | au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4); | |
1da177e4 | 360 | else |
33ea25c1 | 361 | au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4); |
1da177e4 LT |
362 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate); |
363 | return 0; | |
364 | } | |
365 | ||
366 | static int | |
a0d6f880 | 367 | snd_au1000_capture_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 368 | { |
a0d6f880 TI |
369 | struct snd_au1000 *au1000 = substream->pcm->private_data; |
370 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 | 371 | |
33ea25c1 TI |
372 | if (runtime->channels == 1) |
373 | au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4); | |
1da177e4 | 374 | else |
33ea25c1 | 375 | au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4); |
1da177e4 LT |
376 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate); |
377 | return 0; | |
378 | } | |
379 | ||
380 | static int | |
a0d6f880 | 381 | snd_au1000_trigger(struct snd_pcm_substream *substream, int cmd) |
1da177e4 | 382 | { |
a0d6f880 | 383 | struct audio_stream *stream = substream->private_data; |
1da177e4 LT |
384 | int err = 0; |
385 | ||
33ea25c1 | 386 | spin_lock(&stream->dma_lock); |
1da177e4 LT |
387 | switch (cmd) { |
388 | case SNDRV_PCM_TRIGGER_START: | |
389 | au1000_dma_start(stream); | |
390 | break; | |
391 | case SNDRV_PCM_TRIGGER_STOP: | |
392 | au1000_dma_stop(stream); | |
393 | break; | |
394 | default: | |
395 | err = -EINVAL; | |
396 | break; | |
397 | } | |
33ea25c1 | 398 | spin_unlock(&stream->dma_lock); |
1da177e4 LT |
399 | return err; |
400 | } | |
401 | ||
402 | static snd_pcm_uframes_t | |
a0d6f880 | 403 | snd_au1000_pointer(struct snd_pcm_substream *substream) |
1da177e4 | 404 | { |
a0d6f880 TI |
405 | struct audio_stream *stream = substream->private_data; |
406 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
407 | long location; |
408 | ||
33ea25c1 | 409 | spin_lock(&stream->dma_lock); |
1da177e4 | 410 | location = get_dma_residue(stream->dma); |
33ea25c1 | 411 | spin_unlock(&stream->dma_lock); |
1da177e4 LT |
412 | location = stream->buffer->relative_end - location; |
413 | if (location == -1) | |
414 | location = 0; | |
415 | return bytes_to_frames(runtime,location); | |
416 | } | |
417 | ||
a0d6f880 | 418 | static struct snd_pcm_ops snd_card_au1000_playback_ops = { |
1da177e4 LT |
419 | .open = snd_au1000_playback_open, |
420 | .close = snd_au1000_playback_close, | |
421 | .ioctl = snd_pcm_lib_ioctl, | |
422 | .hw_params = snd_au1000_hw_params, | |
423 | .hw_free = snd_au1000_hw_free, | |
424 | .prepare = snd_au1000_playback_prepare, | |
425 | .trigger = snd_au1000_trigger, | |
426 | .pointer = snd_au1000_pointer, | |
427 | }; | |
428 | ||
a0d6f880 | 429 | static struct snd_pcm_ops snd_card_au1000_capture_ops = { |
1da177e4 LT |
430 | .open = snd_au1000_capture_open, |
431 | .close = snd_au1000_capture_close, | |
432 | .ioctl = snd_pcm_lib_ioctl, | |
433 | .hw_params = snd_au1000_hw_params, | |
434 | .hw_free = snd_au1000_hw_free, | |
435 | .prepare = snd_au1000_capture_prepare, | |
436 | .trigger = snd_au1000_trigger, | |
437 | .pointer = snd_au1000_pointer, | |
438 | }; | |
439 | ||
440 | static int __devinit | |
a0d6f880 | 441 | snd_au1000_pcm_new(struct snd_au1000 *au1000) |
1da177e4 | 442 | { |
a0d6f880 | 443 | struct snd_pcm *pcm; |
1da177e4 LT |
444 | int err; |
445 | unsigned long flags; | |
446 | ||
447 | if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0) | |
448 | return err; | |
449 | ||
450 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, | |
451 | snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024); | |
452 | ||
453 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, | |
454 | &snd_card_au1000_playback_ops); | |
455 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, | |
456 | &snd_card_au1000_capture_ops); | |
457 | ||
458 | pcm->private_data = au1000; | |
459 | pcm->info_flags = 0; | |
460 | strcpy(pcm->name, "Au1000 AC97 PCM"); | |
461 | ||
33ea25c1 TI |
462 | spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock); |
463 | spin_lock_init(&au1000->stream[CAPTURE]->dma_lock); | |
464 | ||
1da177e4 LT |
465 | flags = claim_dma_lock(); |
466 | if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX, | |
65ca68b3 | 467 | "AC97 TX", au1000_dma_interrupt, IRQF_DISABLED, |
1da177e4 LT |
468 | au1000->stream[PLAYBACK])) < 0) { |
469 | release_dma_lock(flags); | |
470 | return -EBUSY; | |
471 | } | |
472 | if ((au1000->stream[CAPTURE]->dma = request_au1000_dma(DMA_ID_AC97C_RX, | |
65ca68b3 | 473 | "AC97 RX", au1000_dma_interrupt, IRQF_DISABLED, |
1da177e4 LT |
474 | au1000->stream[CAPTURE])) < 0){ |
475 | release_dma_lock(flags); | |
476 | return -EBUSY; | |
477 | } | |
478 | /* enable DMA coherency in read/write DMA channels */ | |
479 | set_dma_mode(au1000->stream[PLAYBACK]->dma, | |
480 | get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC); | |
481 | set_dma_mode(au1000->stream[CAPTURE]->dma, | |
482 | get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC); | |
483 | release_dma_lock(flags); | |
1da177e4 LT |
484 | au1000->pcm = pcm; |
485 | return 0; | |
486 | } | |
487 | ||
488 | ||
489 | /*-------------------------- AC97 CODEC Control ------------------------------*/ | |
490 | ||
491 | static unsigned short | |
a0d6f880 | 492 | snd_au1000_ac97_read(struct snd_ac97 *ac97, unsigned short reg) |
1da177e4 | 493 | { |
a0d6f880 | 494 | struct snd_au1000 *au1000 = ac97->private_data; |
1da177e4 LT |
495 | u32 volatile cmd; |
496 | u16 volatile data; | |
497 | int i; | |
33ea25c1 | 498 | |
708f9971 | 499 | spin_lock(&au1000->ac97_lock); |
3a4fa0a2 RD |
500 | /* would rather use the interrupt than this polling but it works and I can't |
501 | get the interrupt driven case to work efficiently */ | |
1da177e4 LT |
502 | for (i = 0; i < 0x5000; i++) |
503 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
504 | break; | |
505 | if (i == 0x5000) | |
506 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); | |
507 | ||
508 | cmd = (u32) reg & AC97C_INDEX_MASK; | |
509 | cmd |= AC97C_READ; | |
510 | au1000->ac97_ioport->cmd = cmd; | |
511 | ||
512 | /* now wait for the data */ | |
513 | for (i = 0; i < 0x5000; i++) | |
514 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
515 | break; | |
516 | if (i == 0x5000) { | |
517 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); | |
518 | return 0; | |
519 | } | |
520 | ||
521 | data = au1000->ac97_ioport->cmd & 0xffff; | |
708f9971 | 522 | spin_unlock(&au1000->ac97_lock); |
1da177e4 LT |
523 | |
524 | return data; | |
525 | ||
526 | } | |
527 | ||
528 | ||
529 | static void | |
a0d6f880 | 530 | snd_au1000_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) |
1da177e4 | 531 | { |
a0d6f880 | 532 | struct snd_au1000 *au1000 = ac97->private_data; |
1da177e4 LT |
533 | u32 cmd; |
534 | int i; | |
33ea25c1 | 535 | |
708f9971 | 536 | spin_lock(&au1000->ac97_lock); |
3a4fa0a2 RD |
537 | /* would rather use the interrupt than this polling but it works and I can't |
538 | get the interrupt driven case to work efficiently */ | |
1da177e4 LT |
539 | for (i = 0; i < 0x5000; i++) |
540 | if (!(au1000->ac97_ioport->status & AC97C_CP)) | |
541 | break; | |
542 | if (i == 0x5000) | |
543 | printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n"); | |
544 | ||
545 | cmd = (u32) reg & AC97C_INDEX_MASK; | |
546 | cmd &= ~AC97C_READ; | |
547 | cmd |= ((u32) val << AC97C_WD_BIT); | |
548 | au1000->ac97_ioport->cmd = cmd; | |
708f9971 | 549 | spin_unlock(&au1000->ac97_lock); |
1da177e4 | 550 | } |
1da177e4 LT |
551 | |
552 | static int __devinit | |
a0d6f880 | 553 | snd_au1000_ac97_new(struct snd_au1000 *au1000) |
1da177e4 LT |
554 | { |
555 | int err; | |
a0d6f880 TI |
556 | struct snd_ac97_bus *pbus; |
557 | struct snd_ac97_template ac97; | |
558 | static struct snd_ac97_bus_ops ops = { | |
559 | .write = snd_au1000_ac97_write, | |
560 | .read = snd_au1000_ac97_read, | |
561 | }; | |
1da177e4 | 562 | |
c5c079e3 SS |
563 | if ((au1000->ac97_res_port = request_mem_region(CPHYSADDR(AC97C_CONFIG), |
564 | 0x100000, "Au1x00 AC97")) == NULL) { | |
1da177e4 LT |
565 | snd_printk(KERN_ERR "ALSA AC97: can't grap AC97 port\n"); |
566 | return -EBUSY; | |
567 | } | |
c5c079e3 SS |
568 | au1000->ac97_ioport = (struct au1000_ac97_reg *) |
569 | KSEG1ADDR(au1000->ac97_res_port->start); | |
1da177e4 LT |
570 | |
571 | spin_lock_init(&au1000->ac97_lock); | |
572 | ||
1da177e4 LT |
573 | /* configure pins for AC'97 |
574 | TODO: move to board_setup.c */ | |
575 | au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC); | |
576 | ||
577 | /* Initialise Au1000's AC'97 Control Block */ | |
578 | au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE; | |
579 | udelay(10); | |
580 | au1000->ac97_ioport->cntrl = AC97C_CE; | |
581 | udelay(10); | |
582 | ||
583 | /* Initialise External CODEC -- cold reset */ | |
584 | au1000->ac97_ioport->config = AC97C_RESET; | |
585 | udelay(10); | |
586 | au1000->ac97_ioport->config = 0x0; | |
587 | mdelay(5); | |
588 | ||
1da177e4 | 589 | /* Initialise AC97 middle-layer */ |
1da177e4 LT |
590 | if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0) |
591 | return err; | |
33ea25c1 | 592 | |
1da177e4 LT |
593 | memset(&ac97, 0, sizeof(ac97)); |
594 | ac97.private_data = au1000; | |
1da177e4 LT |
595 | if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0) |
596 | return err; | |
1da177e4 | 597 | |
33ea25c1 | 598 | return 0; |
1da177e4 LT |
599 | } |
600 | ||
601 | /*------------------------------ Setup / Destroy ----------------------------*/ | |
602 | ||
603 | void | |
a0d6f880 | 604 | snd_au1000_free(struct snd_card *card) |
1da177e4 | 605 | { |
a0d6f880 | 606 | struct snd_au1000 *au1000 = card->private_data; |
1da177e4 LT |
607 | |
608 | if (au1000->ac97_res_port) { | |
609 | /* put internal AC97 block into reset */ | |
610 | au1000->ac97_ioport->cntrl = AC97C_RS; | |
611 | au1000->ac97_ioport = NULL; | |
b1d5776d | 612 | release_and_free_resource(au1000->ac97_res_port); |
1da177e4 LT |
613 | } |
614 | ||
bb160b85 SS |
615 | if (au1000->stream[PLAYBACK]) { |
616 | if (au1000->stream[PLAYBACK]->dma >= 0) | |
617 | free_au1000_dma(au1000->stream[PLAYBACK]->dma); | |
618 | kfree(au1000->stream[PLAYBACK]); | |
619 | } | |
1da177e4 | 620 | |
bb160b85 SS |
621 | if (au1000->stream[CAPTURE]) { |
622 | if (au1000->stream[CAPTURE]->dma >= 0) | |
623 | free_au1000_dma(au1000->stream[CAPTURE]->dma); | |
624 | kfree(au1000->stream[CAPTURE]); | |
625 | } | |
1da177e4 LT |
626 | } |
627 | ||
33ea25c1 | 628 | |
a0d6f880 | 629 | static struct snd_card *au1000_card; |
33ea25c1 | 630 | |
1da177e4 LT |
631 | static int __init |
632 | au1000_init(void) | |
633 | { | |
634 | int err; | |
a0d6f880 TI |
635 | struct snd_card *card; |
636 | struct snd_au1000 *au1000; | |
1da177e4 | 637 | |
a0d6f880 | 638 | card = snd_card_new(-1, "AC97", THIS_MODULE, sizeof(struct snd_au1000)); |
33ea25c1 | 639 | if (card == NULL) |
1da177e4 | 640 | return -ENOMEM; |
33ea25c1 TI |
641 | |
642 | card->private_free = snd_au1000_free; | |
643 | au1000 = card->private_data; | |
33ea25c1 | 644 | au1000->card = card; |
bb160b85 | 645 | |
a0d6f880 | 646 | au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL); |
bb160b85 SS |
647 | au1000->stream[CAPTURE ] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL); |
648 | /* so that snd_au1000_free will work as intended */ | |
649 | au1000->ac97_res_port = NULL; | |
650 | if (au1000->stream[PLAYBACK]) | |
651 | au1000->stream[PLAYBACK]->dma = -1; | |
652 | if (au1000->stream[CAPTURE ]) | |
653 | au1000->stream[CAPTURE ]->dma = -1; | |
654 | ||
33ea25c1 | 655 | if (au1000->stream[PLAYBACK] == NULL || |
bb160b85 | 656 | au1000->stream[CAPTURE ] == NULL) { |
33ea25c1 | 657 | snd_card_free(card); |
1da177e4 LT |
658 | return -ENOMEM; |
659 | } | |
660 | ||
33ea25c1 TI |
661 | if ((err = snd_au1000_ac97_new(au1000)) < 0 ) { |
662 | snd_card_free(card); | |
1da177e4 LT |
663 | return err; |
664 | } | |
665 | ||
33ea25c1 TI |
666 | if ((err = snd_au1000_pcm_new(au1000)) < 0) { |
667 | snd_card_free(card); | |
1da177e4 LT |
668 | return err; |
669 | } | |
670 | ||
33ea25c1 TI |
671 | strcpy(card->driver, "Au1000-AC97"); |
672 | strcpy(card->shortname, "AMD Au1000-AC97"); | |
673 | sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver"); | |
1da177e4 | 674 | |
33ea25c1 TI |
675 | if ((err = snd_card_register(card)) < 0) { |
676 | snd_card_free(card); | |
1da177e4 LT |
677 | return err; |
678 | } | |
679 | ||
680 | printk( KERN_INFO "ALSA AC97: Driver Initialized\n" ); | |
33ea25c1 | 681 | au1000_card = card; |
1da177e4 LT |
682 | return 0; |
683 | } | |
684 | ||
685 | static void __exit au1000_exit(void) | |
686 | { | |
33ea25c1 | 687 | snd_card_free(au1000_card); |
1da177e4 LT |
688 | } |
689 | ||
690 | module_init(au1000_init); | |
691 | module_exit(au1000_exit); | |
692 |