1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Driver for audio on multifunction CS5535 companion device
4 * Copyright (C) Jaya Kumar
6 * Based on Jaroslav Kysela and Takashi Iwai's examples.
7 * This work was sponsored by CIS(M) Sdn Bhd.
9 * todo: add be fmt support, spdif, pm
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"
23 static const struct snd_pcm_hardware snd_cs5535audio_playback =
27 SNDRV_PCM_INFO_INTERLEAVED |
28 SNDRV_PCM_INFO_BLOCK_TRANSFER |
29 SNDRV_PCM_INFO_MMAP_VALID |
30 SNDRV_PCM_INFO_PAUSE |
34 SNDRV_PCM_FMTBIT_S16_LE
37 SNDRV_PCM_RATE_CONTINUOUS |
38 SNDRV_PCM_RATE_8000_48000
44 .buffer_bytes_max = (128*1024),
45 .period_bytes_min = 64,
46 .period_bytes_max = (64*1024 - 16),
48 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
52 static const struct snd_pcm_hardware snd_cs5535audio_capture =
56 SNDRV_PCM_INFO_INTERLEAVED |
57 SNDRV_PCM_INFO_BLOCK_TRANSFER |
58 SNDRV_PCM_INFO_MMAP_VALID
61 SNDRV_PCM_FMTBIT_S16_LE
64 SNDRV_PCM_RATE_CONTINUOUS |
65 SNDRV_PCM_RATE_8000_48000
71 .buffer_bytes_max = (128*1024),
72 .period_bytes_min = 64,
73 .period_bytes_max = (64*1024 - 16),
75 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
79 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
82 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
83 struct snd_pcm_runtime *runtime = substream->runtime;
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)
97 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
102 #define CS5535AUDIO_DESC_LIST_SIZE \
103 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
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)
112 u32 addr, desc_addr, jmpprd_addr;
113 struct cs5535audio_dma_desc *lastdesc;
115 if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
118 if (dma->desc_buf.area == NULL) {
119 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
121 CS5535AUDIO_DESC_LIST_SIZE+1,
124 dma->period_bytes = dma->periods = 0;
127 if (dma->periods == periods && dma->period_bytes == period_bytes)
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;
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);
147 lastdesc->ctlreserved = cpu_to_le16(PRD_JMP);
148 jmpprd_addr = (u32)dma->desc_buf.addr +
149 sizeof(struct cs5535audio_dma_desc) * periods;
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);
161 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
163 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
166 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
168 cs_writeb(cs5535au, ACC_BM0_CMD, 0);
171 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
173 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
176 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
179 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
182 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
184 return cs_readl(cs5535au, ACC_BM0_PRD);
187 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
189 return cs_readl(cs5535au, ACC_BM0_PNTR);
192 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
194 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
197 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
199 cs_writeb(cs5535au, ACC_BM1_CMD, 0);
202 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
204 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
207 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
210 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
213 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
215 return cs_readl(cs5535au, ACC_BM1_PRD);
218 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
220 return cs_readl(cs5535au, ACC_BM1_PNTR);
223 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
224 struct cs5535audio_dma *dma,
225 struct snd_pcm_substream *substream)
227 snd_dma_free_pages(&dma->desc_buf);
228 dma->desc_buf.area = NULL;
229 dma->substream = NULL;
232 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *hw_params)
235 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
236 struct cs5535audio_dma *dma = substream->runtime->private_data;
239 dma->buf_addr = substream->runtime->dma_addr;
240 dma->buf_bytes = params_buffer_bytes(hw_params);
242 err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
243 params_periods(hw_params),
244 params_period_bytes(hw_params));
246 dma->pcm_open_flag = 1;
251 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
253 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
254 struct cs5535audio_dma *dma = substream->runtime->private_data;
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);
261 snd_ac97_update_power(cs5535au->ac97,
262 AC97_PCM_LR_ADC_RATE, 0);
263 dma->pcm_open_flag = 0;
265 cs5535audio_clear_dma_packets(cs5535au, dma, substream);
269 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
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);
276 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
278 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
279 struct cs5535audio_dma *dma = substream->runtime->private_data;
282 spin_lock(&cs5535au->reg_lock);
284 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
285 dma->ops->pause_dma(cs5535au);
287 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
288 dma->ops->enable_dma(cs5535au);
290 case SNDRV_PCM_TRIGGER_START:
291 dma->ops->enable_dma(cs5535au);
293 case SNDRV_PCM_TRIGGER_RESUME:
294 dma->ops->enable_dma(cs5535au);
296 case SNDRV_PCM_TRIGGER_STOP:
297 dma->ops->disable_dma(cs5535au);
299 case SNDRV_PCM_TRIGGER_SUSPEND:
300 dma->ops->disable_dma(cs5535au);
303 dev_err(cs5535au->card->dev, "unhandled trigger\n");
307 spin_unlock(&cs5535au->reg_lock);
311 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
314 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
316 struct cs5535audio_dma *dma;
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);
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);
331 return bytes_to_frames(substream->runtime, curdma);
334 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
337 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
338 struct snd_pcm_runtime *runtime = substream->runtime;
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)
348 olpc_capture_open(cs5535au->ac97);
352 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
354 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
355 olpc_capture_close(cs5535au->ac97);
359 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
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);
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,
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,
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,
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,
406 int snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
411 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
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);
424 pcm->private_data = cs5535au;
426 strcpy(pcm->name, "CS5535 Audio");
428 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,