1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Driver for audio on multifunction CS5535 companion device
4 * Copyright (C) Jaya Kumar
5 *
6 * Based on Jaroslav Kysela and Takashi Iwai's examples.
7 * This work was sponsored by CIS(M) Sdn Bhd.
8 *
9 * todo: add be fmt support, spdif, pm
10 */
11
12 #include <linux/init.h>
13 #include <linux/pci.h>
14 #include <sound/core.h>
15 #include <sound/control.h>
16 #include <sound/initval.h>
17 #include <sound/asoundef.h>
18 #include <sound/pcm.h>
19 #include <sound/pcm_params.h>
20 #include <sound/ac97_codec.h>
21 #include "cs5535audio.h"
22
23 static const struct snd_pcm_hardware snd_cs5535audio_playback =
24 {
25 .info = (
26 SNDRV_PCM_INFO_MMAP |
27 SNDRV_PCM_INFO_INTERLEAVED |
28 SNDRV_PCM_INFO_BLOCK_TRANSFER |
29 SNDRV_PCM_INFO_MMAP_VALID |
30 SNDRV_PCM_INFO_PAUSE |
31 SNDRV_PCM_INFO_RESUME
32 ),
33 .formats = (
34 SNDRV_PCM_FMTBIT_S16_LE
35 ),
36 .rates = (
37 SNDRV_PCM_RATE_CONTINUOUS |
38 SNDRV_PCM_RATE_8000_48000
39 ),
40 .rate_min = 4000,
41 .rate_max = 48000,
42 .channels_min = 2,
43 .channels_max = 2,
44 .buffer_bytes_max = (128*1024),
45 .period_bytes_min = 64,
46 .period_bytes_max = (64*1024 - 16),
47 .periods_min = 1,
48 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
49 .fifo_size = 0,
50 };
51
52 static const struct snd_pcm_hardware snd_cs5535audio_capture =
53 {
54 .info = (
55 SNDRV_PCM_INFO_MMAP |
56 SNDRV_PCM_INFO_INTERLEAVED |
57 SNDRV_PCM_INFO_BLOCK_TRANSFER |
58 SNDRV_PCM_INFO_MMAP_VALID
59 ),
60 .formats = (
61 SNDRV_PCM_FMTBIT_S16_LE
62 ),
63 .rates = (
64 SNDRV_PCM_RATE_CONTINUOUS |
65 SNDRV_PCM_RATE_8000_48000
66 ),
67 .rate_min = 4000,
68 .rate_max = 48000,
69 .channels_min = 2,
70 .channels_max = 2,
71 .buffer_bytes_max = (128*1024),
72 .period_bytes_min = 64,
73 .period_bytes_max = (64*1024 - 16),
74 .periods_min = 1,
75 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
76 .fifo_size = 0,
77 };
78
snd_cs5535audio_playback_open(struct snd_pcm_substream * substream)79 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
80 {
81 int err;
82 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
83 struct snd_pcm_runtime *runtime = substream->runtime;
84
85 runtime->hw = snd_cs5535audio_playback;
86 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC];
87 snd_pcm_limit_hw_rates(runtime);
88 cs5535au->playback_substream = substream;
89 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
90 if ((err = snd_pcm_hw_constraint_integer(runtime,
91 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
92 return err;
93
94 return 0;
95 }
96
snd_cs5535audio_playback_close(struct snd_pcm_substream * substream)97 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
98 {
99 return 0;
100 }
101
102 #define CS5535AUDIO_DESC_LIST_SIZE \
103 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
104
cs5535audio_build_dma_packets(struct cs5535audio * cs5535au,struct cs5535audio_dma * dma,struct snd_pcm_substream * substream,unsigned int periods,unsigned int period_bytes)105 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
106 struct cs5535audio_dma *dma,
107 struct snd_pcm_substream *substream,
108 unsigned int periods,
109 unsigned int period_bytes)
110 {
111 unsigned int i;
112 u32 addr, desc_addr, jmpprd_addr;
113 struct cs5535audio_dma_desc *lastdesc;
114
115 if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
116 return -ENOMEM;
117
118 if (dma->desc_buf.area == NULL) {
119 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
120 &cs5535au->pci->dev,
121 CS5535AUDIO_DESC_LIST_SIZE+1,
122 &dma->desc_buf) < 0)
123 return -ENOMEM;
124 dma->period_bytes = dma->periods = 0;
125 }
126
127 if (dma->periods == periods && dma->period_bytes == period_bytes)
128 return 0;
129
130 /* the u32 cast is okay because in snd*create we successfully told
131 pci alloc that we're only 32 bit capable so the uppper will be 0 */
132 addr = (u32) substream->runtime->dma_addr;
133 desc_addr = (u32) dma->desc_buf.addr;
134 for (i = 0; i < periods; i++) {
135 struct cs5535audio_dma_desc *desc =
136 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
137 desc->addr = cpu_to_le32(addr);
138 desc->size = cpu_to_le16(period_bytes);
139 desc->ctlreserved = cpu_to_le16(PRD_EOP);
140 desc_addr += sizeof(struct cs5535audio_dma_desc);
141 addr += period_bytes;
142 }
143 /* we reserved one dummy descriptor at the end to do the PRD jump */
144 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
145 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
146 lastdesc->size = 0;
147 lastdesc->ctlreserved = cpu_to_le16(PRD_JMP);
148 jmpprd_addr = (u32)dma->desc_buf.addr +
149 sizeof(struct cs5535audio_dma_desc) * periods;
150
151 dma->substream = substream;
152 dma->period_bytes = period_bytes;
153 dma->periods = periods;
154 spin_lock_irq(&cs5535au->reg_lock);
155 dma->ops->disable_dma(cs5535au);
156 dma->ops->setup_prd(cs5535au, jmpprd_addr);
157 spin_unlock_irq(&cs5535au->reg_lock);
158 return 0;
159 }
160
cs5535audio_playback_enable_dma(struct cs5535audio * cs5535au)161 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
162 {
163 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
164 }
165
cs5535audio_playback_disable_dma(struct cs5535audio * cs5535au)166 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
167 {
168 cs_writeb(cs5535au, ACC_BM0_CMD, 0);
169 }
170
cs5535audio_playback_pause_dma(struct cs5535audio * cs5535au)171 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
172 {
173 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
174 }
175
cs5535audio_playback_setup_prd(struct cs5535audio * cs5535au,u32 prd_addr)176 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
177 u32 prd_addr)
178 {
179 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
180 }
181
cs5535audio_playback_read_prd(struct cs5535audio * cs5535au)182 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
183 {
184 return cs_readl(cs5535au, ACC_BM0_PRD);
185 }
186
cs5535audio_playback_read_dma_pntr(struct cs5535audio * cs5535au)187 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
188 {
189 return cs_readl(cs5535au, ACC_BM0_PNTR);
190 }
191
cs5535audio_capture_enable_dma(struct cs5535audio * cs5535au)192 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
193 {
194 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
195 }
196
cs5535audio_capture_disable_dma(struct cs5535audio * cs5535au)197 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
198 {
199 cs_writeb(cs5535au, ACC_BM1_CMD, 0);
200 }
201
cs5535audio_capture_pause_dma(struct cs5535audio * cs5535au)202 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
203 {
204 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
205 }
206
cs5535audio_capture_setup_prd(struct cs5535audio * cs5535au,u32 prd_addr)207 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
208 u32 prd_addr)
209 {
210 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
211 }
212
cs5535audio_capture_read_prd(struct cs5535audio * cs5535au)213 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
214 {
215 return cs_readl(cs5535au, ACC_BM1_PRD);
216 }
217
cs5535audio_capture_read_dma_pntr(struct cs5535audio * cs5535au)218 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
219 {
220 return cs_readl(cs5535au, ACC_BM1_PNTR);
221 }
222
cs5535audio_clear_dma_packets(struct cs5535audio * cs5535au,struct cs5535audio_dma * dma,struct snd_pcm_substream * substream)223 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
224 struct cs5535audio_dma *dma,
225 struct snd_pcm_substream *substream)
226 {
227 snd_dma_free_pages(&dma->desc_buf);
228 dma->desc_buf.area = NULL;
229 dma->substream = NULL;
230 }
231
snd_cs5535audio_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)232 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *hw_params)
234 {
235 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
236 struct cs5535audio_dma *dma = substream->runtime->private_data;
237 int err;
238
239 dma->buf_addr = substream->runtime->dma_addr;
240 dma->buf_bytes = params_buffer_bytes(hw_params);
241
242 err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
243 params_periods(hw_params),
244 params_period_bytes(hw_params));
245 if (!err)
246 dma->pcm_open_flag = 1;
247
248 return err;
249 }
250
snd_cs5535audio_hw_free(struct snd_pcm_substream * substream)251 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
252 {
253 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
254 struct cs5535audio_dma *dma = substream->runtime->private_data;
255
256 if (dma->pcm_open_flag) {
257 if (substream == cs5535au->playback_substream)
258 snd_ac97_update_power(cs5535au->ac97,
259 AC97_PCM_FRONT_DAC_RATE, 0);
260 else
261 snd_ac97_update_power(cs5535au->ac97,
262 AC97_PCM_LR_ADC_RATE, 0);
263 dma->pcm_open_flag = 0;
264 }
265 cs5535audio_clear_dma_packets(cs5535au, dma, substream);
266 return 0;
267 }
268
snd_cs5535audio_playback_prepare(struct snd_pcm_substream * substream)269 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
270 {
271 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
272 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
273 substream->runtime->rate);
274 }
275
snd_cs5535audio_trigger(struct snd_pcm_substream * substream,int cmd)276 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
277 {
278 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
279 struct cs5535audio_dma *dma = substream->runtime->private_data;
280 int err = 0;
281
282 spin_lock(&cs5535au->reg_lock);
283 switch (cmd) {
284 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
285 dma->ops->pause_dma(cs5535au);
286 break;
287 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
288 dma->ops->enable_dma(cs5535au);
289 break;
290 case SNDRV_PCM_TRIGGER_START:
291 dma->ops->enable_dma(cs5535au);
292 break;
293 case SNDRV_PCM_TRIGGER_RESUME:
294 dma->ops->enable_dma(cs5535au);
295 break;
296 case SNDRV_PCM_TRIGGER_STOP:
297 dma->ops->disable_dma(cs5535au);
298 break;
299 case SNDRV_PCM_TRIGGER_SUSPEND:
300 dma->ops->disable_dma(cs5535au);
301 break;
302 default:
303 dev_err(cs5535au->card->dev, "unhandled trigger\n");
304 err = -EINVAL;
305 break;
306 }
307 spin_unlock(&cs5535au->reg_lock);
308 return err;
309 }
310
snd_cs5535audio_pcm_pointer(struct snd_pcm_substream * substream)311 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
312 *substream)
313 {
314 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
315 u32 curdma;
316 struct cs5535audio_dma *dma;
317
318 dma = substream->runtime->private_data;
319 curdma = dma->ops->read_dma_pntr(cs5535au);
320 if (curdma < dma->buf_addr) {
321 dev_err(cs5535au->card->dev, "curdma=%x < %x bufaddr.\n",
322 curdma, dma->buf_addr);
323 return 0;
324 }
325 curdma -= dma->buf_addr;
326 if (curdma >= dma->buf_bytes) {
327 dev_err(cs5535au->card->dev, "diff=%x >= %x buf_bytes.\n",
328 curdma, dma->buf_bytes);
329 return 0;
330 }
331 return bytes_to_frames(substream->runtime, curdma);
332 }
333
snd_cs5535audio_capture_open(struct snd_pcm_substream * substream)334 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
335 {
336 int err;
337 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
338 struct snd_pcm_runtime *runtime = substream->runtime;
339
340 runtime->hw = snd_cs5535audio_capture;
341 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
342 snd_pcm_limit_hw_rates(runtime);
343 cs5535au->capture_substream = substream;
344 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
345 if ((err = snd_pcm_hw_constraint_integer(runtime,
346 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
347 return err;
348 olpc_capture_open(cs5535au->ac97);
349 return 0;
350 }
351
snd_cs5535audio_capture_close(struct snd_pcm_substream * substream)352 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
353 {
354 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
355 olpc_capture_close(cs5535au->ac97);
356 return 0;
357 }
358
snd_cs5535audio_capture_prepare(struct snd_pcm_substream * substream)359 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
360 {
361 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
362 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
363 substream->runtime->rate);
364 }
365
366 static const struct snd_pcm_ops snd_cs5535audio_playback_ops = {
367 .open = snd_cs5535audio_playback_open,
368 .close = snd_cs5535audio_playback_close,
369 .hw_params = snd_cs5535audio_hw_params,
370 .hw_free = snd_cs5535audio_hw_free,
371 .prepare = snd_cs5535audio_playback_prepare,
372 .trigger = snd_cs5535audio_trigger,
373 .pointer = snd_cs5535audio_pcm_pointer,
374 };
375
376 static const struct snd_pcm_ops snd_cs5535audio_capture_ops = {
377 .open = snd_cs5535audio_capture_open,
378 .close = snd_cs5535audio_capture_close,
379 .hw_params = snd_cs5535audio_hw_params,
380 .hw_free = snd_cs5535audio_hw_free,
381 .prepare = snd_cs5535audio_capture_prepare,
382 .trigger = snd_cs5535audio_trigger,
383 .pointer = snd_cs5535audio_pcm_pointer,
384 };
385
386 static const struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
387 .type = CS5535AUDIO_DMA_PLAYBACK,
388 .enable_dma = cs5535audio_playback_enable_dma,
389 .disable_dma = cs5535audio_playback_disable_dma,
390 .setup_prd = cs5535audio_playback_setup_prd,
391 .read_prd = cs5535audio_playback_read_prd,
392 .pause_dma = cs5535audio_playback_pause_dma,
393 .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
394 };
395
396 static const struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
397 .type = CS5535AUDIO_DMA_CAPTURE,
398 .enable_dma = cs5535audio_capture_enable_dma,
399 .disable_dma = cs5535audio_capture_disable_dma,
400 .setup_prd = cs5535audio_capture_setup_prd,
401 .read_prd = cs5535audio_capture_read_prd,
402 .pause_dma = cs5535audio_capture_pause_dma,
403 .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
404 };
405
snd_cs5535audio_pcm(struct cs5535audio * cs5535au)406 int snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
407 {
408 struct snd_pcm *pcm;
409 int err;
410
411 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
412 if (err < 0)
413 return err;
414
415 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
416 &snd_cs5535audio_playback_dma_ops;
417 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
418 &snd_cs5535audio_capture_dma_ops;
419 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
420 &snd_cs5535audio_playback_ops);
421 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
422 &snd_cs5535audio_capture_ops);
423
424 pcm->private_data = cs5535au;
425 pcm->info_flags = 0;
426 strcpy(pcm->name, "CS5535 Audio");
427
428 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
429 &cs5535au->pci->dev,
430 64*1024, 128*1024);
431 cs5535au->pcm = pcm;
432
433 return 0;
434 }
435
436
