Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4ede028f | 2 | /* |
128ed6a9 | 3 | * Driver for Atmel AC97C |
4ede028f HCE |
4 | * |
5 | * Copyright (C) 2005-2009 Atmel Corporation | |
4ede028f HCE |
6 | */ |
7 | #include <linux/clk.h> | |
8 | #include <linux/delay.h> | |
9 | #include <linux/bitmap.h> | |
128ed6a9 | 10 | #include <linux/device.h> |
7177395f | 11 | #include <linux/atmel_pdc.h> |
5f10e849 | 12 | #include <linux/gpio/consumer.h> |
4ede028f HCE |
13 | #include <linux/init.h> |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/platform_device.h> | |
17 | #include <linux/mutex.h> | |
e2b35f3d | 18 | #include <linux/types.h> |
4ede028f | 19 | #include <linux/io.h> |
b2d8957f | 20 | #include <linux/of.h> |
b2d8957f | 21 | #include <linux/of_device.h> |
4ede028f HCE |
22 | |
23 | #include <sound/core.h> | |
24 | #include <sound/initval.h> | |
25 | #include <sound/pcm.h> | |
26 | #include <sound/pcm_params.h> | |
27 | #include <sound/ac97_codec.h> | |
4ede028f HCE |
28 | #include <sound/memalloc.h> |
29 | ||
4ede028f HCE |
30 | #include "ac97c.h" |
31 | ||
4ede028f HCE |
32 | /* Serialize access to opened variable */ |
33 | static DEFINE_MUTEX(opened_mutex); | |
34 | ||
4ede028f HCE |
35 | struct atmel_ac97c { |
36 | struct clk *pclk; | |
37 | struct platform_device *pdev; | |
4ede028f HCE |
38 | |
39 | struct snd_pcm_substream *playback_substream; | |
40 | struct snd_pcm_substream *capture_substream; | |
41 | struct snd_card *card; | |
42 | struct snd_pcm *pcm; | |
43 | struct snd_ac97 *ac97; | |
44 | struct snd_ac97_bus *ac97_bus; | |
45 | ||
46 | u64 cur_format; | |
47 | unsigned int cur_rate; | |
7177395f | 48 | int playback_period, capture_period; |
4ede028f HCE |
49 | /* Serialize access to opened variable */ |
50 | spinlock_t lock; | |
51 | void __iomem *regs; | |
df163587 | 52 | int irq; |
4ede028f | 53 | int opened; |
5f10e849 | 54 | struct gpio_desc *reset_pin; |
4ede028f HCE |
55 | }; |
56 | ||
57 | #define get_chip(card) ((struct atmel_ac97c *)(card)->private_data) | |
58 | ||
59 | #define ac97c_writel(chip, reg, val) \ | |
60 | __raw_writel((val), (chip)->regs + AC97C_##reg) | |
61 | #define ac97c_readl(chip, reg) \ | |
62 | __raw_readl((chip)->regs + AC97C_##reg) | |
63 | ||
85ab3738 | 64 | static const struct snd_pcm_hardware atmel_ac97c_hw = { |
4ede028f HCE |
65 | .info = (SNDRV_PCM_INFO_MMAP |
66 | | SNDRV_PCM_INFO_MMAP_VALID | |
67 | | SNDRV_PCM_INFO_INTERLEAVED | |
68 | | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
69 | | SNDRV_PCM_INFO_JOINT_DUPLEX | |
70 | | SNDRV_PCM_INFO_RESUME | |
71 | | SNDRV_PCM_INFO_PAUSE), | |
72 | .formats = (SNDRV_PCM_FMTBIT_S16_BE | |
73 | | SNDRV_PCM_FMTBIT_S16_LE), | |
74 | .rates = (SNDRV_PCM_RATE_CONTINUOUS), | |
75 | .rate_min = 4000, | |
76 | .rate_max = 48000, | |
77 | .channels_min = 1, | |
78 | .channels_max = 2, | |
c42eec0f | 79 | .buffer_bytes_max = 2 * 2 * 64 * 2048, |
4ede028f HCE |
80 | .period_bytes_min = 4096, |
81 | .period_bytes_max = 4096, | |
c42eec0f | 82 | .periods_min = 6, |
4ede028f HCE |
83 | .periods_max = 64, |
84 | }; | |
85 | ||
86 | static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream) | |
87 | { | |
88 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
89 | struct snd_pcm_runtime *runtime = substream->runtime; | |
90 | ||
91 | mutex_lock(&opened_mutex); | |
92 | chip->opened++; | |
93 | runtime->hw = atmel_ac97c_hw; | |
94 | if (chip->cur_rate) { | |
95 | runtime->hw.rate_min = chip->cur_rate; | |
96 | runtime->hw.rate_max = chip->cur_rate; | |
97 | } | |
98 | if (chip->cur_format) | |
74c34ca1 | 99 | runtime->hw.formats = pcm_format_to_bits(chip->cur_format); |
4ede028f HCE |
100 | mutex_unlock(&opened_mutex); |
101 | chip->playback_substream = substream; | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream) | |
106 | { | |
107 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
108 | struct snd_pcm_runtime *runtime = substream->runtime; | |
109 | ||
110 | mutex_lock(&opened_mutex); | |
111 | chip->opened++; | |
112 | runtime->hw = atmel_ac97c_hw; | |
113 | if (chip->cur_rate) { | |
114 | runtime->hw.rate_min = chip->cur_rate; | |
115 | runtime->hw.rate_max = chip->cur_rate; | |
116 | } | |
117 | if (chip->cur_format) | |
74c34ca1 | 118 | runtime->hw.formats = pcm_format_to_bits(chip->cur_format); |
4ede028f HCE |
119 | mutex_unlock(&opened_mutex); |
120 | chip->capture_substream = substream; | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static int atmel_ac97c_playback_close(struct snd_pcm_substream *substream) | |
125 | { | |
126 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
127 | ||
128 | mutex_lock(&opened_mutex); | |
129 | chip->opened--; | |
130 | if (!chip->opened) { | |
131 | chip->cur_rate = 0; | |
132 | chip->cur_format = 0; | |
133 | } | |
134 | mutex_unlock(&opened_mutex); | |
135 | ||
136 | chip->playback_substream = NULL; | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
141 | static int atmel_ac97c_capture_close(struct snd_pcm_substream *substream) | |
142 | { | |
143 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
144 | ||
145 | mutex_lock(&opened_mutex); | |
146 | chip->opened--; | |
147 | if (!chip->opened) { | |
148 | chip->cur_rate = 0; | |
149 | chip->cur_format = 0; | |
150 | } | |
151 | mutex_unlock(&opened_mutex); | |
152 | ||
153 | chip->capture_substream = NULL; | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
158 | static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream, | |
159 | struct snd_pcm_hw_params *hw_params) | |
160 | { | |
161 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
162 | int retval; | |
163 | ||
164 | retval = snd_pcm_lib_malloc_pages(substream, | |
165 | params_buffer_bytes(hw_params)); | |
166 | if (retval < 0) | |
167 | return retval; | |
020c5260 | 168 | |
4ede028f HCE |
169 | /* Set restrictions to params. */ |
170 | mutex_lock(&opened_mutex); | |
171 | chip->cur_rate = params_rate(hw_params); | |
172 | chip->cur_format = params_format(hw_params); | |
173 | mutex_unlock(&opened_mutex); | |
174 | ||
175 | return retval; | |
176 | } | |
177 | ||
178 | static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream, | |
179 | struct snd_pcm_hw_params *hw_params) | |
180 | { | |
181 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
182 | int retval; | |
183 | ||
184 | retval = snd_pcm_lib_malloc_pages(substream, | |
185 | params_buffer_bytes(hw_params)); | |
186 | if (retval < 0) | |
187 | return retval; | |
4ede028f HCE |
188 | |
189 | /* Set restrictions to params. */ | |
190 | mutex_lock(&opened_mutex); | |
191 | chip->cur_rate = params_rate(hw_params); | |
192 | chip->cur_format = params_format(hw_params); | |
193 | mutex_unlock(&opened_mutex); | |
194 | ||
195 | return retval; | |
196 | } | |
197 | ||
4ede028f HCE |
198 | static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream) |
199 | { | |
200 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
201 | struct snd_pcm_runtime *runtime = substream->runtime; | |
7177395f | 202 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
128ed6a9 | 203 | unsigned long word = ac97c_readl(chip, OCA); |
4ede028f HCE |
204 | int retval; |
205 | ||
7177395f | 206 | chip->playback_period = 0; |
128ed6a9 HCE |
207 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
208 | ||
4ede028f HCE |
209 | /* assign channels to AC97C channel A */ |
210 | switch (runtime->channels) { | |
211 | case 1: | |
212 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); | |
213 | break; | |
214 | case 2: | |
215 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) | |
216 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); | |
217 | break; | |
218 | default: | |
219 | /* TODO: support more than two channels */ | |
220 | return -EINVAL; | |
4ede028f HCE |
221 | } |
222 | ac97c_writel(chip, OCA, word); | |
223 | ||
224 | /* configure sample format and size */ | |
ec2755a9 SG |
225 | word = ac97c_readl(chip, CAMR); |
226 | if (chip->opened <= 1) | |
227 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
228 | else | |
229 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
4ede028f HCE |
230 | |
231 | switch (runtime->format) { | |
232 | case SNDRV_PCM_FORMAT_S16_LE: | |
4ede028f HCE |
233 | break; |
234 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ | |
4ede028f HCE |
235 | word &= ~(AC97C_CMR_CEM_LITTLE); |
236 | break; | |
128ed6a9 HCE |
237 | default: |
238 | word = ac97c_readl(chip, OCA); | |
239 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); | |
240 | ac97c_writel(chip, OCA, word); | |
241 | return -EINVAL; | |
4ede028f HCE |
242 | } |
243 | ||
df163587 HCE |
244 | /* Enable underrun interrupt on channel A */ |
245 | word |= AC97C_CSR_UNRUN; | |
246 | ||
4ede028f HCE |
247 | ac97c_writel(chip, CAMR, word); |
248 | ||
df163587 HCE |
249 | /* Enable channel A event interrupt */ |
250 | word = ac97c_readl(chip, IMR); | |
251 | word |= AC97C_SR_CAEVT; | |
252 | ac97c_writel(chip, IER, word); | |
253 | ||
4ede028f HCE |
254 | /* set variable rate if needed */ |
255 | if (runtime->rate != 48000) { | |
256 | word = ac97c_readl(chip, MR); | |
257 | word |= AC97C_MR_VRA; | |
258 | ac97c_writel(chip, MR, word); | |
259 | } else { | |
260 | word = ac97c_readl(chip, MR); | |
261 | word &= ~(AC97C_MR_VRA); | |
262 | ac97c_writel(chip, MR, word); | |
263 | } | |
264 | ||
265 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, | |
266 | runtime->rate); | |
267 | if (retval) | |
268 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", | |
269 | runtime->rate); | |
270 | ||
020c5260 AS |
271 | /* Initialize and start the PDC */ |
272 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR); | |
273 | writel(block_size / 2, chip->regs + ATMEL_PDC_TCR); | |
274 | writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_TNPR); | |
275 | writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR); | |
4ede028f HCE |
276 | |
277 | return retval; | |
278 | } | |
279 | ||
280 | static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream) | |
281 | { | |
282 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
283 | struct snd_pcm_runtime *runtime = substream->runtime; | |
7177395f | 284 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
128ed6a9 | 285 | unsigned long word = ac97c_readl(chip, ICA); |
4ede028f HCE |
286 | int retval; |
287 | ||
7177395f | 288 | chip->capture_period = 0; |
128ed6a9 HCE |
289 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
290 | ||
4ede028f HCE |
291 | /* assign channels to AC97C channel A */ |
292 | switch (runtime->channels) { | |
293 | case 1: | |
294 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); | |
295 | break; | |
296 | case 2: | |
297 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) | |
298 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); | |
299 | break; | |
300 | default: | |
301 | /* TODO: support more than two channels */ | |
302 | return -EINVAL; | |
4ede028f HCE |
303 | } |
304 | ac97c_writel(chip, ICA, word); | |
305 | ||
306 | /* configure sample format and size */ | |
ec2755a9 SG |
307 | word = ac97c_readl(chip, CAMR); |
308 | if (chip->opened <= 1) | |
309 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
310 | else | |
311 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
4ede028f HCE |
312 | |
313 | switch (runtime->format) { | |
314 | case SNDRV_PCM_FORMAT_S16_LE: | |
4ede028f HCE |
315 | break; |
316 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ | |
4ede028f HCE |
317 | word &= ~(AC97C_CMR_CEM_LITTLE); |
318 | break; | |
128ed6a9 HCE |
319 | default: |
320 | word = ac97c_readl(chip, ICA); | |
321 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); | |
322 | ac97c_writel(chip, ICA, word); | |
323 | return -EINVAL; | |
4ede028f HCE |
324 | } |
325 | ||
df163587 HCE |
326 | /* Enable overrun interrupt on channel A */ |
327 | word |= AC97C_CSR_OVRUN; | |
328 | ||
4ede028f HCE |
329 | ac97c_writel(chip, CAMR, word); |
330 | ||
df163587 HCE |
331 | /* Enable channel A event interrupt */ |
332 | word = ac97c_readl(chip, IMR); | |
333 | word |= AC97C_SR_CAEVT; | |
334 | ac97c_writel(chip, IER, word); | |
335 | ||
4ede028f HCE |
336 | /* set variable rate if needed */ |
337 | if (runtime->rate != 48000) { | |
338 | word = ac97c_readl(chip, MR); | |
339 | word |= AC97C_MR_VRA; | |
340 | ac97c_writel(chip, MR, word); | |
341 | } else { | |
342 | word = ac97c_readl(chip, MR); | |
343 | word &= ~(AC97C_MR_VRA); | |
344 | ac97c_writel(chip, MR, word); | |
345 | } | |
346 | ||
347 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, | |
348 | runtime->rate); | |
349 | if (retval) | |
350 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", | |
351 | runtime->rate); | |
352 | ||
020c5260 AS |
353 | /* Initialize and start the PDC */ |
354 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR); | |
355 | writel(block_size / 2, chip->regs + ATMEL_PDC_RCR); | |
356 | writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_RNPR); | |
357 | writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR); | |
4ede028f HCE |
358 | |
359 | return retval; | |
360 | } | |
361 | ||
362 | static int | |
363 | atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd) | |
364 | { | |
365 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
7177395f | 366 | unsigned long camr, ptcr = 0; |
4ede028f HCE |
367 | |
368 | camr = ac97c_readl(chip, CAMR); | |
369 | ||
370 | switch (cmd) { | |
371 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ | |
372 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ | |
373 | case SNDRV_PCM_TRIGGER_START: | |
020c5260 | 374 | ptcr = ATMEL_PDC_TXTEN; |
ec2755a9 | 375 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX; |
4ede028f HCE |
376 | break; |
377 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ | |
378 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ | |
379 | case SNDRV_PCM_TRIGGER_STOP: | |
020c5260 | 380 | ptcr |= ATMEL_PDC_TXTDIS; |
4ede028f HCE |
381 | if (chip->opened <= 1) |
382 | camr &= ~AC97C_CMR_CENA; | |
383 | break; | |
384 | default: | |
020c5260 | 385 | return -EINVAL; |
4ede028f HCE |
386 | } |
387 | ||
388 | ac97c_writel(chip, CAMR, camr); | |
020c5260 AS |
389 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
390 | return 0; | |
4ede028f HCE |
391 | } |
392 | ||
393 | static int | |
394 | atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd) | |
395 | { | |
396 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
7177395f | 397 | unsigned long camr, ptcr = 0; |
4ede028f HCE |
398 | |
399 | camr = ac97c_readl(chip, CAMR); | |
7177395f | 400 | ptcr = readl(chip->regs + ATMEL_PDC_PTSR); |
4ede028f HCE |
401 | |
402 | switch (cmd) { | |
403 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ | |
404 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ | |
405 | case SNDRV_PCM_TRIGGER_START: | |
020c5260 | 406 | ptcr = ATMEL_PDC_RXTEN; |
ec2755a9 | 407 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX; |
4ede028f HCE |
408 | break; |
409 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ | |
410 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ | |
411 | case SNDRV_PCM_TRIGGER_STOP: | |
020c5260 | 412 | ptcr |= ATMEL_PDC_RXTDIS; |
4ede028f HCE |
413 | if (chip->opened <= 1) |
414 | camr &= ~AC97C_CMR_CENA; | |
415 | break; | |
416 | default: | |
020c5260 | 417 | return -EINVAL; |
4ede028f HCE |
418 | } |
419 | ||
420 | ac97c_writel(chip, CAMR, camr); | |
020c5260 AS |
421 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
422 | return 0; | |
4ede028f HCE |
423 | } |
424 | ||
425 | static snd_pcm_uframes_t | |
426 | atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream) | |
427 | { | |
428 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
429 | struct snd_pcm_runtime *runtime = substream->runtime; | |
430 | snd_pcm_uframes_t frames; | |
431 | unsigned long bytes; | |
432 | ||
020c5260 | 433 | bytes = readl(chip->regs + ATMEL_PDC_TPR); |
4ede028f HCE |
434 | bytes -= runtime->dma_addr; |
435 | ||
436 | frames = bytes_to_frames(runtime, bytes); | |
437 | if (frames >= runtime->buffer_size) | |
438 | frames -= runtime->buffer_size; | |
439 | return frames; | |
440 | } | |
441 | ||
442 | static snd_pcm_uframes_t | |
443 | atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream) | |
444 | { | |
445 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
446 | struct snd_pcm_runtime *runtime = substream->runtime; | |
447 | snd_pcm_uframes_t frames; | |
448 | unsigned long bytes; | |
449 | ||
020c5260 | 450 | bytes = readl(chip->regs + ATMEL_PDC_RPR); |
4ede028f HCE |
451 | bytes -= runtime->dma_addr; |
452 | ||
453 | frames = bytes_to_frames(runtime, bytes); | |
454 | if (frames >= runtime->buffer_size) | |
455 | frames -= runtime->buffer_size; | |
456 | return frames; | |
457 | } | |
458 | ||
10863737 | 459 | static const struct snd_pcm_ops atmel_ac97_playback_ops = { |
4ede028f HCE |
460 | .open = atmel_ac97c_playback_open, |
461 | .close = atmel_ac97c_playback_close, | |
462 | .ioctl = snd_pcm_lib_ioctl, | |
463 | .hw_params = atmel_ac97c_playback_hw_params, | |
020c5260 | 464 | .hw_free = snd_pcm_lib_free_pages, |
4ede028f HCE |
465 | .prepare = atmel_ac97c_playback_prepare, |
466 | .trigger = atmel_ac97c_playback_trigger, | |
467 | .pointer = atmel_ac97c_playback_pointer, | |
468 | }; | |
469 | ||
10863737 | 470 | static const struct snd_pcm_ops atmel_ac97_capture_ops = { |
4ede028f HCE |
471 | .open = atmel_ac97c_capture_open, |
472 | .close = atmel_ac97c_capture_close, | |
473 | .ioctl = snd_pcm_lib_ioctl, | |
474 | .hw_params = atmel_ac97c_capture_hw_params, | |
020c5260 | 475 | .hw_free = snd_pcm_lib_free_pages, |
4ede028f HCE |
476 | .prepare = atmel_ac97c_capture_prepare, |
477 | .trigger = atmel_ac97c_capture_trigger, | |
478 | .pointer = atmel_ac97c_capture_pointer, | |
479 | }; | |
480 | ||
df163587 HCE |
481 | static irqreturn_t atmel_ac97c_interrupt(int irq, void *dev) |
482 | { | |
483 | struct atmel_ac97c *chip = (struct atmel_ac97c *)dev; | |
484 | irqreturn_t retval = IRQ_NONE; | |
485 | u32 sr = ac97c_readl(chip, SR); | |
486 | u32 casr = ac97c_readl(chip, CASR); | |
487 | u32 cosr = ac97c_readl(chip, COSR); | |
7177395f | 488 | u32 camr = ac97c_readl(chip, CAMR); |
df163587 HCE |
489 | |
490 | if (sr & AC97C_SR_CAEVT) { | |
7177395f SG |
491 | struct snd_pcm_runtime *runtime; |
492 | int offset, next_period, block_size; | |
f5341163 | 493 | dev_dbg(&chip->pdev->dev, "channel A event%s%s%s%s%s%s\n", |
df163587 HCE |
494 | casr & AC97C_CSR_OVRUN ? " OVRUN" : "", |
495 | casr & AC97C_CSR_RXRDY ? " RXRDY" : "", | |
496 | casr & AC97C_CSR_UNRUN ? " UNRUN" : "", | |
497 | casr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", | |
498 | casr & AC97C_CSR_TXRDY ? " TXRDY" : "", | |
499 | !casr ? " NONE" : ""); | |
020c5260 AS |
500 | if ((casr & camr) & AC97C_CSR_ENDTX) { |
501 | runtime = chip->playback_substream->runtime; | |
502 | block_size = frames_to_bytes(runtime, runtime->period_size); | |
503 | chip->playback_period++; | |
504 | ||
505 | if (chip->playback_period == runtime->periods) | |
506 | chip->playback_period = 0; | |
507 | next_period = chip->playback_period + 1; | |
508 | if (next_period == runtime->periods) | |
509 | next_period = 0; | |
510 | ||
511 | offset = block_size * next_period; | |
512 | ||
513 | writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_TNPR); | |
514 | writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR); | |
515 | ||
516 | snd_pcm_period_elapsed(chip->playback_substream); | |
517 | } | |
518 | if ((casr & camr) & AC97C_CSR_ENDRX) { | |
519 | runtime = chip->capture_substream->runtime; | |
520 | block_size = frames_to_bytes(runtime, runtime->period_size); | |
521 | chip->capture_period++; | |
522 | ||
523 | if (chip->capture_period == runtime->periods) | |
524 | chip->capture_period = 0; | |
525 | next_period = chip->capture_period + 1; | |
526 | if (next_period == runtime->periods) | |
527 | next_period = 0; | |
528 | ||
529 | offset = block_size * next_period; | |
530 | ||
531 | writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_RNPR); | |
532 | writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR); | |
533 | snd_pcm_period_elapsed(chip->capture_substream); | |
7177395f | 534 | } |
df163587 HCE |
535 | retval = IRQ_HANDLED; |
536 | } | |
537 | ||
538 | if (sr & AC97C_SR_COEVT) { | |
539 | dev_info(&chip->pdev->dev, "codec channel event%s%s%s%s%s\n", | |
540 | cosr & AC97C_CSR_OVRUN ? " OVRUN" : "", | |
541 | cosr & AC97C_CSR_RXRDY ? " RXRDY" : "", | |
542 | cosr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", | |
543 | cosr & AC97C_CSR_TXRDY ? " TXRDY" : "", | |
544 | !cosr ? " NONE" : ""); | |
545 | retval = IRQ_HANDLED; | |
546 | } | |
547 | ||
548 | if (retval == IRQ_NONE) { | |
549 | dev_err(&chip->pdev->dev, "spurious interrupt sr 0x%08x " | |
550 | "casr 0x%08x cosr 0x%08x\n", sr, casr, cosr); | |
551 | } | |
552 | ||
553 | return retval; | |
554 | } | |
555 | ||
3ca8590b | 556 | static const struct ac97_pcm at91_ac97_pcm_defs[] = { |
7177395f SG |
557 | /* Playback */ |
558 | { | |
559 | .exclusive = 1, | |
560 | .r = { { | |
561 | .slots = ((1 << AC97_SLOT_PCM_LEFT) | |
562 | | (1 << AC97_SLOT_PCM_RIGHT)), | |
563 | } }, | |
564 | }, | |
565 | /* PCM in */ | |
566 | { | |
567 | .stream = 1, | |
568 | .exclusive = 1, | |
569 | .r = { { | |
570 | .slots = ((1 << AC97_SLOT_PCM_LEFT) | |
571 | | (1 << AC97_SLOT_PCM_RIGHT)), | |
572 | } } | |
573 | }, | |
574 | /* Mic in */ | |
575 | { | |
576 | .stream = 1, | |
577 | .exclusive = 1, | |
578 | .r = { { | |
579 | .slots = (1<<AC97_SLOT_MIC), | |
580 | } } | |
581 | }, | |
582 | }; | |
583 | ||
61dc674c | 584 | static int atmel_ac97c_pcm_new(struct atmel_ac97c *chip) |
4ede028f HCE |
585 | { |
586 | struct snd_pcm *pcm; | |
587 | struct snd_pcm_hardware hw = atmel_ac97c_hw; | |
020c5260 | 588 | int retval; |
4ede028f | 589 | |
020c5260 AS |
590 | retval = snd_ac97_pcm_assign(chip->ac97_bus, |
591 | ARRAY_SIZE(at91_ac97_pcm_defs), | |
592 | at91_ac97_pcm_defs); | |
593 | if (retval) | |
594 | return retval; | |
4ede028f | 595 | |
020c5260 | 596 | retval = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm); |
4ede028f HCE |
597 | if (retval) |
598 | return retval; | |
599 | ||
020c5260 AS |
600 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &atmel_ac97_capture_ops); |
601 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &atmel_ac97_playback_ops); | |
4ede028f | 602 | |
e6e8c82b | 603 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, |
4ede028f HCE |
604 | &chip->pdev->dev, hw.periods_min * hw.period_bytes_min, |
605 | hw.buffer_bytes_max); | |
4ede028f HCE |
606 | |
607 | pcm->private_data = chip; | |
608 | pcm->info_flags = 0; | |
609 | strcpy(pcm->name, chip->card->shortname); | |
610 | chip->pcm = pcm; | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
615 | static int atmel_ac97c_mixer_new(struct atmel_ac97c *chip) | |
616 | { | |
617 | struct snd_ac97_template template; | |
618 | memset(&template, 0, sizeof(template)); | |
619 | template.private_data = chip; | |
620 | return snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97); | |
621 | } | |
622 | ||
623 | static void atmel_ac97c_write(struct snd_ac97 *ac97, unsigned short reg, | |
624 | unsigned short val) | |
625 | { | |
626 | struct atmel_ac97c *chip = get_chip(ac97); | |
627 | unsigned long word; | |
628 | int timeout = 40; | |
629 | ||
630 | word = (reg & 0x7f) << 16 | val; | |
631 | ||
632 | do { | |
633 | if (ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) { | |
634 | ac97c_writel(chip, COTHR, word); | |
635 | return; | |
636 | } | |
637 | udelay(1); | |
638 | } while (--timeout); | |
639 | ||
640 | dev_dbg(&chip->pdev->dev, "codec write timeout\n"); | |
641 | } | |
642 | ||
643 | static unsigned short atmel_ac97c_read(struct snd_ac97 *ac97, | |
644 | unsigned short reg) | |
645 | { | |
646 | struct atmel_ac97c *chip = get_chip(ac97); | |
647 | unsigned long word; | |
648 | int timeout = 40; | |
649 | int write = 10; | |
650 | ||
651 | word = (0x80 | (reg & 0x7f)) << 16; | |
652 | ||
653 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) | |
654 | ac97c_readl(chip, CORHR); | |
655 | ||
656 | retry_write: | |
657 | timeout = 40; | |
658 | ||
659 | do { | |
660 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) != 0) { | |
661 | ac97c_writel(chip, COTHR, word); | |
662 | goto read_reg; | |
663 | } | |
664 | udelay(10); | |
665 | } while (--timeout); | |
666 | ||
667 | if (!--write) | |
668 | goto timed_out; | |
669 | goto retry_write; | |
670 | ||
671 | read_reg: | |
672 | do { | |
673 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) { | |
674 | unsigned short val = ac97c_readl(chip, CORHR); | |
675 | return val; | |
676 | } | |
677 | udelay(10); | |
678 | } while (--timeout); | |
679 | ||
680 | if (!--write) | |
681 | goto timed_out; | |
682 | goto retry_write; | |
683 | ||
684 | timed_out: | |
685 | dev_dbg(&chip->pdev->dev, "codec read timeout\n"); | |
686 | return 0xffff; | |
687 | } | |
688 | ||
4ede028f HCE |
689 | static void atmel_ac97c_reset(struct atmel_ac97c *chip) |
690 | { | |
81baf3a7 HCE |
691 | ac97c_writel(chip, MR, 0); |
692 | ac97c_writel(chip, MR, AC97C_MR_ENA); | |
693 | ac97c_writel(chip, CAMR, 0); | |
694 | ac97c_writel(chip, COMR, 0); | |
4ede028f | 695 | |
5f10e849 AS |
696 | if (!IS_ERR(chip->reset_pin)) { |
697 | gpiod_set_value(chip->reset_pin, 0); | |
4ede028f | 698 | /* AC97 v2.2 specifications says minimum 1 us. */ |
81baf3a7 | 699 | udelay(2); |
5f10e849 | 700 | gpiod_set_value(chip->reset_pin, 1); |
8015e3de BS |
701 | } else { |
702 | ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA); | |
703 | udelay(2); | |
704 | ac97c_writel(chip, MR, AC97C_MR_ENA); | |
4ede028f | 705 | } |
4ede028f HCE |
706 | } |
707 | ||
b2d8957f AS |
708 | static const struct of_device_id atmel_ac97c_dt_ids[] = { |
709 | { .compatible = "atmel,at91sam9263-ac97c", }, | |
710 | { } | |
711 | }; | |
712 | MODULE_DEVICE_TABLE(of, atmel_ac97c_dt_ids); | |
713 | ||
61dc674c | 714 | static int atmel_ac97c_probe(struct platform_device *pdev) |
4ede028f | 715 | { |
5f10e849 | 716 | struct device *dev = &pdev->dev; |
4ede028f HCE |
717 | struct snd_card *card; |
718 | struct atmel_ac97c *chip; | |
719 | struct resource *regs; | |
4ede028f HCE |
720 | struct clk *pclk; |
721 | static struct snd_ac97_bus_ops ops = { | |
722 | .write = atmel_ac97c_write, | |
723 | .read = atmel_ac97c_read, | |
724 | }; | |
725 | int retval; | |
df163587 | 726 | int irq; |
4ede028f HCE |
727 | |
728 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
729 | if (!regs) { | |
730 | dev_dbg(&pdev->dev, "no memory resource\n"); | |
731 | return -ENXIO; | |
732 | } | |
733 | ||
df163587 HCE |
734 | irq = platform_get_irq(pdev, 0); |
735 | if (irq < 0) { | |
77201135 GS |
736 | dev_dbg(&pdev->dev, "could not get irq: %d\n", irq); |
737 | return irq; | |
df163587 HCE |
738 | } |
739 | ||
020c5260 | 740 | pclk = clk_get(&pdev->dev, "ac97_clk"); |
4ede028f HCE |
741 | if (IS_ERR(pclk)) { |
742 | dev_dbg(&pdev->dev, "no peripheral clock\n"); | |
743 | return PTR_ERR(pclk); | |
744 | } | |
260ea95c AY |
745 | retval = clk_prepare_enable(pclk); |
746 | if (retval) | |
0515760f | 747 | goto err_prepare_enable; |
4ede028f | 748 | |
a4f2473d TI |
749 | retval = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1, |
750 | SNDRV_DEFAULT_STR1, THIS_MODULE, | |
751 | sizeof(struct atmel_ac97c), &card); | |
4ede028f HCE |
752 | if (retval) { |
753 | dev_dbg(&pdev->dev, "could not create sound card device\n"); | |
754 | goto err_snd_card_new; | |
755 | } | |
756 | ||
757 | chip = get_chip(card); | |
758 | ||
df163587 HCE |
759 | retval = request_irq(irq, atmel_ac97c_interrupt, 0, "AC97C", chip); |
760 | if (retval) { | |
761 | dev_dbg(&pdev->dev, "unable to request irq %d\n", irq); | |
762 | goto err_request_irq; | |
763 | } | |
764 | chip->irq = irq; | |
765 | ||
4ede028f HCE |
766 | spin_lock_init(&chip->lock); |
767 | ||
768 | strcpy(card->driver, "Atmel AC97C"); | |
769 | strcpy(card->shortname, "Atmel AC97C"); | |
770 | sprintf(card->longname, "Atmel AC97 controller"); | |
771 | ||
772 | chip->card = card; | |
773 | chip->pclk = pclk; | |
774 | chip->pdev = pdev; | |
28f65c11 | 775 | chip->regs = ioremap(regs->start, resource_size(regs)); |
4ede028f HCE |
776 | |
777 | if (!chip->regs) { | |
778 | dev_dbg(&pdev->dev, "could not remap register memory\n"); | |
0c23e46e | 779 | retval = -ENOMEM; |
4ede028f HCE |
780 | goto err_ioremap; |
781 | } | |
782 | ||
5f10e849 AS |
783 | chip->reset_pin = devm_gpiod_get_index(dev, "ac97", 2, GPIOD_OUT_HIGH); |
784 | if (IS_ERR(chip->reset_pin)) | |
785 | dev_dbg(dev, "reset pin not available\n"); | |
4ede028f | 786 | |
81baf3a7 HCE |
787 | atmel_ac97c_reset(chip); |
788 | ||
df163587 HCE |
789 | /* Enable overrun interrupt from codec channel */ |
790 | ac97c_writel(chip, COMR, AC97C_CSR_OVRUN); | |
791 | ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT); | |
792 | ||
4ede028f HCE |
793 | retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus); |
794 | if (retval) { | |
795 | dev_dbg(&pdev->dev, "could not register on ac97 bus\n"); | |
796 | goto err_ac97_bus; | |
797 | } | |
798 | ||
4ede028f HCE |
799 | retval = atmel_ac97c_mixer_new(chip); |
800 | if (retval) { | |
801 | dev_dbg(&pdev->dev, "could not register ac97 mixer\n"); | |
802 | goto err_ac97_bus; | |
803 | } | |
804 | ||
4ede028f HCE |
805 | retval = atmel_ac97c_pcm_new(chip); |
806 | if (retval) { | |
807 | dev_dbg(&pdev->dev, "could not register ac97 pcm device\n"); | |
020c5260 | 808 | goto err_ac97_bus; |
4ede028f HCE |
809 | } |
810 | ||
811 | retval = snd_card_register(card); | |
812 | if (retval) { | |
813 | dev_dbg(&pdev->dev, "could not register sound card\n"); | |
020c5260 | 814 | goto err_ac97_bus; |
4ede028f HCE |
815 | } |
816 | ||
817 | platform_set_drvdata(pdev, card); | |
818 | ||
7177395f SG |
819 | dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n", |
820 | chip->regs, irq); | |
4ede028f HCE |
821 | |
822 | return 0; | |
823 | ||
4ede028f | 824 | err_ac97_bus: |
4ede028f HCE |
825 | iounmap(chip->regs); |
826 | err_ioremap: | |
df163587 HCE |
827 | free_irq(irq, chip); |
828 | err_request_irq: | |
4ede028f HCE |
829 | snd_card_free(card); |
830 | err_snd_card_new: | |
1132015b | 831 | clk_disable_unprepare(pclk); |
0515760f | 832 | err_prepare_enable: |
4ede028f HCE |
833 | clk_put(pclk); |
834 | return retval; | |
835 | } | |
836 | ||
d34e4e00 | 837 | #ifdef CONFIG_PM_SLEEP |
284e7ca7 | 838 | static int atmel_ac97c_suspend(struct device *pdev) |
4ede028f | 839 | { |
284e7ca7 | 840 | struct snd_card *card = dev_get_drvdata(pdev); |
4ede028f HCE |
841 | struct atmel_ac97c *chip = card->private_data; |
842 | ||
1132015b | 843 | clk_disable_unprepare(chip->pclk); |
4ede028f HCE |
844 | return 0; |
845 | } | |
846 | ||
284e7ca7 | 847 | static int atmel_ac97c_resume(struct device *pdev) |
4ede028f | 848 | { |
284e7ca7 | 849 | struct snd_card *card = dev_get_drvdata(pdev); |
4ede028f | 850 | struct atmel_ac97c *chip = card->private_data; |
260ea95c | 851 | int ret = clk_prepare_enable(chip->pclk); |
4ede028f | 852 | |
260ea95c | 853 | return ret; |
4ede028f | 854 | } |
284e7ca7 TI |
855 | |
856 | static SIMPLE_DEV_PM_OPS(atmel_ac97c_pm, atmel_ac97c_suspend, atmel_ac97c_resume); | |
857 | #define ATMEL_AC97C_PM_OPS &atmel_ac97c_pm | |
4ede028f | 858 | #else |
284e7ca7 | 859 | #define ATMEL_AC97C_PM_OPS NULL |
4ede028f HCE |
860 | #endif |
861 | ||
61dc674c | 862 | static int atmel_ac97c_remove(struct platform_device *pdev) |
4ede028f HCE |
863 | { |
864 | struct snd_card *card = platform_get_drvdata(pdev); | |
865 | struct atmel_ac97c *chip = get_chip(card); | |
866 | ||
bd74a184 HCE |
867 | ac97c_writel(chip, CAMR, 0); |
868 | ac97c_writel(chip, COMR, 0); | |
869 | ac97c_writel(chip, MR, 0); | |
870 | ||
1132015b | 871 | clk_disable_unprepare(chip->pclk); |
4ede028f HCE |
872 | clk_put(chip->pclk); |
873 | iounmap(chip->regs); | |
df163587 | 874 | free_irq(chip->irq, chip); |
4ede028f | 875 | |
4ede028f HCE |
876 | snd_card_free(card); |
877 | ||
4ede028f HCE |
878 | return 0; |
879 | } | |
880 | ||
881 | static struct platform_driver atmel_ac97c_driver = { | |
4b973ee0 | 882 | .probe = atmel_ac97c_probe, |
61dc674c | 883 | .remove = atmel_ac97c_remove, |
4ede028f HCE |
884 | .driver = { |
885 | .name = "atmel_ac97c", | |
284e7ca7 | 886 | .pm = ATMEL_AC97C_PM_OPS, |
5f10e849 | 887 | .of_match_table = atmel_ac97c_dt_ids, |
4ede028f | 888 | }, |
4ede028f | 889 | }; |
4b973ee0 | 890 | module_platform_driver(atmel_ac97c_driver); |
4ede028f HCE |
891 | |
892 | MODULE_LICENSE("GPL"); | |
893 | MODULE_DESCRIPTION("Driver for Atmel AC97 controller"); | |
0cfae7c9 | 894 | MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>"); |