blob: 3f3ec0bec0671675de52887586f9f672f06d4431 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/init.h>
40#include <linux/slab.h>
Paul Gortmakerda155d52011-07-15 12:38:28 -040041#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <sound/core.h>
43#include <sound/initval.h>
44#include <sound/pcm.h>
Sergei Shtylylovd8327c72006-03-20 18:38:21 +010045#include <sound/pcm_params.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <sound/ac97_codec.h>
47#include <asm/mach-au1x00/au1000.h>
48#include <asm/mach-au1x00/au1000_dma.h>
49
50MODULE_AUTHOR("Charles Eidsness <charles@cooper-street.com>");
51MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver");
52MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -070053MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}");
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070066struct au1000_period
67{
68 u32 start;
69 u32 relative_end; /*realtive to start of buffer*/
Takashi Iwaia0d6f882005-11-17 15:12:31 +010070 struct au1000_period * next;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071};
72
73/*Au1000 AC97 Port Control Reisters*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070074struct 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070082struct audio_stream {
Takashi Iwaia0d6f882005-11-17 15:12:31 +010083 struct snd_pcm_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 int dma;
85 spinlock_t dma_lock;
Takashi Iwaia0d6f882005-11-17 15:12:31 +010086 struct au1000_period * buffer;
Takashi Iwai33ea25c2005-11-17 10:32:43 +010087 unsigned int period_size;
88 unsigned int periods;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089};
90
Takashi Iwaia0d6f882005-11-17 15:12:31 +010091struct snd_au1000 {
92 struct snd_card *card;
93 struct au1000_ac97_reg volatile *ac97_ioport;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95 struct resource *ac97_res_port;
96 spinlock_t ac97_lock;
Takashi Iwaia0d6f882005-11-17 15:12:31 +010097 struct snd_ac97 *ac97;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Takashi Iwaia0d6f882005-11-17 15:12:31 +010099 struct snd_pcm *pcm;
100 struct audio_stream *stream[2]; /* playback & capture */
101};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103/*--------------------------- Local Functions --------------------------------*/
104static void
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100105au1000_set_ac97_xmit_slots(struct snd_au1000 *au1000, long xmit_slots)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106{
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
117static void
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100118au1000_set_ac97_recv_slots(struct snd_au1000 *au1000, long recv_slots)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119{
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
131static void
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100132au1000_release_dma_link(struct audio_stream *stream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100134 struct au1000_period * pointer;
135 struct au1000_period * pointer_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100137 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100150static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100151au1000_setup_dma_link(struct audio_stream *stream, unsigned int period_bytes,
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100152 unsigned int periods)
153{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100154 struct snd_pcm_substream *substream = stream->substream;
155 struct snd_pcm_runtime *runtime = substream->runtime;
Sergei Shtylylovd8327c72006-03-20 18:38:21 +0100156 struct au1000_period *pointer;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100157 unsigned long dma_start;
158 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100160 dma_start = virt_to_phys(runtime->dma_area);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100162 if (stream->period_size == period_bytes &&
163 stream->periods == periods)
164 return 0; /* not changed */
165
166 au1000_release_dma_link(stream);
167
168 stream->period_size = period_bytes;
169 stream->periods = periods;
170
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100171 stream->buffer = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100172 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 }
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100187 pointer->next = stream->buffer;
188 return 0;
189}
190
191static void
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100192au1000_dma_stop(struct audio_stream *stream)
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100193{
Takashi Iwai5e246b82008-08-08 17:12:47 +0200194 if (snd_BUG_ON(!stream->buffer))
195 return;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100196 disable_dma(stream->dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197}
198
199static void
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100200au1000_dma_start(struct audio_stream *stream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201{
Takashi Iwai5e246b82008-08-08 17:12:47 +0200202 if (snd_BUG_ON(!stream->buffer))
203 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100205 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 }
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100219 enable_dma_buffers(stream->dma);
220 start_dma(stream->dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221}
222
223static irqreturn_t
David Howells7d12e782006-10-05 14:55:46 +0100224au1000_dma_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100226 struct audio_stream *stream = (struct audio_stream *) dev_id;
227 struct snd_pcm_substream *substream = stream->substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
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):
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma);
247 au1000_dma_stop(stream);
248 au1000_dma_start(stream);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 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
260static unsigned int rates[] = {8000, 11025, 16000, 22050};
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100261static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
Tobias Klauser2ad34792006-09-29 02:00:20 -0700262 .count = ARRAY_SIZE(rates),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 .list = rates,
264 .mask = 0,
265};
266
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100267static struct snd_pcm_hardware snd_au1000_hw =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268{
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
286static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100287snd_au1000_playback_open(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100289 struct snd_au1000 *au1000 = substream->pcm->private_data;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 au1000->stream[PLAYBACK]->substream = substream;
292 au1000->stream[PLAYBACK]->buffer = NULL;
293 substream->private_data = au1000->stream[PLAYBACK];
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100294 substream->runtime->hw = snd_au1000_hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 return (snd_pcm_hw_constraint_list(substream->runtime, 0,
296 SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
297}
298
299static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100300snd_au1000_capture_open(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100302 struct snd_au1000 *au1000 = substream->pcm->private_data;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 au1000->stream[CAPTURE]->substream = substream;
305 au1000->stream[CAPTURE]->buffer = NULL;
306 substream->private_data = au1000->stream[CAPTURE];
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100307 substream->runtime->hw = snd_au1000_hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 return (snd_pcm_hw_constraint_list(substream->runtime, 0,
309 SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310}
311
312static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100313snd_au1000_playback_close(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100315 struct snd_au1000 *au1000 = substream->pcm->private_data;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100316
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 au1000->stream[PLAYBACK]->substream = NULL;
318 return 0;
319}
320
321static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100322snd_au1000_capture_close(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100324 struct snd_au1000 *au1000 = substream->pcm->private_data;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100325
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 au1000->stream[CAPTURE]->substream = NULL;
327 return 0;
328}
329
330static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100331snd_au1000_hw_params(struct snd_pcm_substream *substream,
332 struct snd_pcm_hw_params *hw_params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100334 struct audio_stream *stream = substream->private_data;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100335 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));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344}
345
346static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100347snd_au1000_hw_free(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100349 struct audio_stream *stream = substream->private_data;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100350 au1000_release_dma_link(stream);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 return snd_pcm_lib_free_pages(substream);
352}
353
354static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100355snd_au1000_playback_prepare(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100357 struct snd_au1000 *au1000 = substream->pcm->private_data;
358 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100360 if (runtime->channels == 1)
361 au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 else
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100363 au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
365 return 0;
366}
367
368static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100369snd_au1000_capture_prepare(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100371 struct snd_au1000 *au1000 = substream->pcm->private_data;
372 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100374 if (runtime->channels == 1)
375 au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 else
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100377 au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
379 return 0;
380}
381
382static int
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100383snd_au1000_trigger(struct snd_pcm_substream *substream, int cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100385 struct audio_stream *stream = substream->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 int err = 0;
387
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100388 spin_lock(&stream->dma_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 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 }
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100400 spin_unlock(&stream->dma_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return err;
402}
403
404static snd_pcm_uframes_t
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100405snd_au1000_pointer(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100407 struct audio_stream *stream = substream->private_data;
408 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 long location;
410
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100411 spin_lock(&stream->dma_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 location = get_dma_residue(stream->dma);
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100413 spin_unlock(&stream->dma_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 location = stream->buffer->relative_end - location;
415 if (location == -1)
416 location = 0;
417 return bytes_to_frames(runtime,location);
418}
419
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100420static struct snd_pcm_ops snd_card_au1000_playback_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 .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
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100431static struct snd_pcm_ops snd_card_au1000_capture_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 .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
442static int __devinit
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100443snd_au1000_pcm_new(struct snd_au1000 *au1000)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100445 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 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
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100464 spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock);
465 spin_lock_init(&au1000->stream[CAPTURE]->dma_lock);
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 flags = claim_dma_lock();
468 if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX,
Yong Zhang88e24c32011-09-22 16:59:20 +0800469 "AC97 TX", au1000_dma_interrupt, 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 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,
Yong Zhang88e24c32011-09-22 16:59:20 +0800475 "AC97 RX", au1000_dma_interrupt, 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 au1000->pcm = pcm;
487 return 0;
488}
489
490
491/*-------------------------- AC97 CODEC Control ------------------------------*/
492
493static unsigned short
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100494snd_au1000_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100496 struct snd_au1000 *au1000 = ac97->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 u32 volatile cmd;
498 u16 volatile data;
499 int i;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100500
Konstantin Baydarov708f9972005-10-27 17:25:02 +0200501 spin_lock(&au1000->ac97_lock);
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200502/* would rather use the interrupt than this polling but it works and I can't
503get the interrupt driven case to work efficiently */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 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");
Julia Lawall1efddcc2010-05-26 17:59:27 +0200520 spin_unlock(&au1000->ac97_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 return 0;
522 }
523
524 data = au1000->ac97_ioport->cmd & 0xffff;
Konstantin Baydarov708f9972005-10-27 17:25:02 +0200525 spin_unlock(&au1000->ac97_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
527 return data;
528
529}
530
531
532static void
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100533snd_au1000_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100535 struct snd_au1000 *au1000 = ac97->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 u32 cmd;
537 int i;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100538
Konstantin Baydarov708f9972005-10-27 17:25:02 +0200539 spin_lock(&au1000->ac97_lock);
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200540/* would rather use the interrupt than this polling but it works and I can't
541get the interrupt driven case to work efficiently */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 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;
Konstantin Baydarov708f9972005-10-27 17:25:02 +0200552 spin_unlock(&au1000->ac97_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
555static int __devinit
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100556snd_au1000_ac97_new(struct snd_au1000 *au1000)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557{
558 int err;
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100559 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 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Sergei Shtylyovc5c079e2006-03-21 12:01:17 +0100566 if ((au1000->ac97_res_port = request_mem_region(CPHYSADDR(AC97C_CONFIG),
567 0x100000, "Au1x00 AC97")) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 snd_printk(KERN_ERR "ALSA AC97: can't grap AC97 port\n");
569 return -EBUSY;
570 }
Sergei Shtylyovc5c079e2006-03-21 12:01:17 +0100571 au1000->ac97_ioport = (struct au1000_ac97_reg *)
572 KSEG1ADDR(au1000->ac97_res_port->start);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
574 spin_lock_init(&au1000->ac97_lock);
575
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 /* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 /* Initialise AC97 middle-layer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0)
594 return err;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 memset(&ac97, 0, sizeof(ac97));
597 ac97.private_data = au1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0)
599 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100601 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602}
603
604/*------------------------------ Setup / Destroy ----------------------------*/
605
606void
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100607snd_au1000_free(struct snd_card *card)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608{
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100609 struct snd_au1000 *au1000 = card->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610
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;
Takashi Iwaib1d57762005-10-10 11:56:31 +0200615 release_and_free_resource(au1000->ac97_res_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 }
617
Sergei Shtylyovbb160b82006-03-21 11:58:48 +0100618 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
Sergei Shtylyovbb160b82006-03-21 11:58:48 +0100624 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629}
630
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100631
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100632static struct snd_card *au1000_card;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100633
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634static int __init
635au1000_init(void)
636{
637 int err;
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100638 struct snd_card *card;
639 struct snd_au1000 *au1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
Takashi Iwaibd7dd772008-12-28 16:45:02 +0100641 err = snd_card_create(-1, "AC97", THIS_MODULE,
642 sizeof(struct snd_au1000), &card);
643 if (err < 0)
644 return err;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100645
646 card->private_free = snd_au1000_free;
647 au1000 = card->private_data;
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100648 au1000->card = card;
Sergei Shtylyovbb160b82006-03-21 11:58:48 +0100649
Takashi Iwaia0d6f882005-11-17 15:12:31 +0100650 au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL);
Sergei Shtylyovbb160b82006-03-21 11:58:48 +0100651 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
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100659 if (au1000->stream[PLAYBACK] == NULL ||
Sergei Shtylyovbb160b82006-03-21 11:58:48 +0100660 au1000->stream[CAPTURE ] == NULL) {
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100661 snd_card_free(card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 return -ENOMEM;
663 }
664
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100665 if ((err = snd_au1000_ac97_new(au1000)) < 0 ) {
666 snd_card_free(card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 return err;
668 }
669
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100670 if ((err = snd_au1000_pcm_new(au1000)) < 0) {
671 snd_card_free(card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 return err;
673 }
674
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100675 strcpy(card->driver, "Au1000-AC97");
676 strcpy(card->shortname, "AMD Au1000-AC97");
677 sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100679 if ((err = snd_card_register(card)) < 0) {
680 snd_card_free(card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 return err;
682 }
683
Takashi Iwai2ebfb8e2009-02-05 16:11:58 +0100684 printk(KERN_INFO "ALSA AC97: Driver Initialized\n");
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100685 au1000_card = card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 return 0;
687}
688
689static void __exit au1000_exit(void)
690{
Takashi Iwai33ea25c2005-11-17 10:32:43 +0100691 snd_card_free(au1000_card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692}
693
694module_init(au1000_init);
695module_exit(au1000_exit);
696