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4ede028f | 1 | /* |
128ed6a9 | 2 | * Driver for Atmel AC97C |
4ede028f HCE |
3 | * |
4 | * Copyright (C) 2005-2009 Atmel Corporation | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published by | |
8 | * the Free Software Foundation. | |
9 | */ | |
10 | #include <linux/clk.h> | |
11 | #include <linux/delay.h> | |
12 | #include <linux/bitmap.h> | |
128ed6a9 | 13 | #include <linux/device.h> |
7177395f | 14 | #include <linux/atmel_pdc.h> |
5f10e849 | 15 | #include <linux/gpio/consumer.h> |
4ede028f HCE |
16 | #include <linux/init.h> |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/mutex.h> | |
e2b35f3d | 21 | #include <linux/types.h> |
4ede028f | 22 | #include <linux/io.h> |
b2d8957f | 23 | #include <linux/of.h> |
b2d8957f | 24 | #include <linux/of_device.h> |
4ede028f HCE |
25 | |
26 | #include <sound/core.h> | |
27 | #include <sound/initval.h> | |
28 | #include <sound/pcm.h> | |
29 | #include <sound/pcm_params.h> | |
30 | #include <sound/ac97_codec.h> | |
4ede028f HCE |
31 | #include <sound/memalloc.h> |
32 | ||
4ede028f HCE |
33 | #include "ac97c.h" |
34 | ||
4ede028f HCE |
35 | /* Serialize access to opened variable */ |
36 | static DEFINE_MUTEX(opened_mutex); | |
37 | ||
4ede028f HCE |
38 | struct atmel_ac97c { |
39 | struct clk *pclk; | |
40 | struct platform_device *pdev; | |
4ede028f HCE |
41 | |
42 | struct snd_pcm_substream *playback_substream; | |
43 | struct snd_pcm_substream *capture_substream; | |
44 | struct snd_card *card; | |
45 | struct snd_pcm *pcm; | |
46 | struct snd_ac97 *ac97; | |
47 | struct snd_ac97_bus *ac97_bus; | |
48 | ||
49 | u64 cur_format; | |
50 | unsigned int cur_rate; | |
7177395f | 51 | int playback_period, capture_period; |
4ede028f HCE |
52 | /* Serialize access to opened variable */ |
53 | spinlock_t lock; | |
54 | void __iomem *regs; | |
df163587 | 55 | int irq; |
4ede028f | 56 | int opened; |
5f10e849 | 57 | struct gpio_desc *reset_pin; |
4ede028f HCE |
58 | }; |
59 | ||
60 | #define get_chip(card) ((struct atmel_ac97c *)(card)->private_data) | |
61 | ||
62 | #define ac97c_writel(chip, reg, val) \ | |
63 | __raw_writel((val), (chip)->regs + AC97C_##reg) | |
64 | #define ac97c_readl(chip, reg) \ | |
65 | __raw_readl((chip)->regs + AC97C_##reg) | |
66 | ||
85ab3738 | 67 | static const struct snd_pcm_hardware atmel_ac97c_hw = { |
4ede028f HCE |
68 | .info = (SNDRV_PCM_INFO_MMAP |
69 | | SNDRV_PCM_INFO_MMAP_VALID | |
70 | | SNDRV_PCM_INFO_INTERLEAVED | |
71 | | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
72 | | SNDRV_PCM_INFO_JOINT_DUPLEX | |
73 | | SNDRV_PCM_INFO_RESUME | |
74 | | SNDRV_PCM_INFO_PAUSE), | |
75 | .formats = (SNDRV_PCM_FMTBIT_S16_BE | |
76 | | SNDRV_PCM_FMTBIT_S16_LE), | |
77 | .rates = (SNDRV_PCM_RATE_CONTINUOUS), | |
78 | .rate_min = 4000, | |
79 | .rate_max = 48000, | |
80 | .channels_min = 1, | |
81 | .channels_max = 2, | |
c42eec0f | 82 | .buffer_bytes_max = 2 * 2 * 64 * 2048, |
4ede028f HCE |
83 | .period_bytes_min = 4096, |
84 | .period_bytes_max = 4096, | |
c42eec0f | 85 | .periods_min = 6, |
4ede028f HCE |
86 | .periods_max = 64, |
87 | }; | |
88 | ||
89 | static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream) | |
90 | { | |
91 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
92 | struct snd_pcm_runtime *runtime = substream->runtime; | |
93 | ||
94 | mutex_lock(&opened_mutex); | |
95 | chip->opened++; | |
96 | runtime->hw = atmel_ac97c_hw; | |
97 | if (chip->cur_rate) { | |
98 | runtime->hw.rate_min = chip->cur_rate; | |
99 | runtime->hw.rate_max = chip->cur_rate; | |
100 | } | |
101 | if (chip->cur_format) | |
74c34ca1 | 102 | runtime->hw.formats = pcm_format_to_bits(chip->cur_format); |
4ede028f HCE |
103 | mutex_unlock(&opened_mutex); |
104 | chip->playback_substream = substream; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream) | |
109 | { | |
110 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
111 | struct snd_pcm_runtime *runtime = substream->runtime; | |
112 | ||
113 | mutex_lock(&opened_mutex); | |
114 | chip->opened++; | |
115 | runtime->hw = atmel_ac97c_hw; | |
116 | if (chip->cur_rate) { | |
117 | runtime->hw.rate_min = chip->cur_rate; | |
118 | runtime->hw.rate_max = chip->cur_rate; | |
119 | } | |
120 | if (chip->cur_format) | |
74c34ca1 | 121 | runtime->hw.formats = pcm_format_to_bits(chip->cur_format); |
4ede028f HCE |
122 | mutex_unlock(&opened_mutex); |
123 | chip->capture_substream = substream; | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static int atmel_ac97c_playback_close(struct snd_pcm_substream *substream) | |
128 | { | |
129 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
130 | ||
131 | mutex_lock(&opened_mutex); | |
132 | chip->opened--; | |
133 | if (!chip->opened) { | |
134 | chip->cur_rate = 0; | |
135 | chip->cur_format = 0; | |
136 | } | |
137 | mutex_unlock(&opened_mutex); | |
138 | ||
139 | chip->playback_substream = NULL; | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | static int atmel_ac97c_capture_close(struct snd_pcm_substream *substream) | |
145 | { | |
146 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
147 | ||
148 | mutex_lock(&opened_mutex); | |
149 | chip->opened--; | |
150 | if (!chip->opened) { | |
151 | chip->cur_rate = 0; | |
152 | chip->cur_format = 0; | |
153 | } | |
154 | mutex_unlock(&opened_mutex); | |
155 | ||
156 | chip->capture_substream = NULL; | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream, | |
162 | struct snd_pcm_hw_params *hw_params) | |
163 | { | |
164 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
165 | int retval; | |
166 | ||
167 | retval = snd_pcm_lib_malloc_pages(substream, | |
168 | params_buffer_bytes(hw_params)); | |
169 | if (retval < 0) | |
170 | return retval; | |
020c5260 | 171 | |
4ede028f HCE |
172 | /* Set restrictions to params. */ |
173 | mutex_lock(&opened_mutex); | |
174 | chip->cur_rate = params_rate(hw_params); | |
175 | chip->cur_format = params_format(hw_params); | |
176 | mutex_unlock(&opened_mutex); | |
177 | ||
178 | return retval; | |
179 | } | |
180 | ||
181 | static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream, | |
182 | struct snd_pcm_hw_params *hw_params) | |
183 | { | |
184 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
185 | int retval; | |
186 | ||
187 | retval = snd_pcm_lib_malloc_pages(substream, | |
188 | params_buffer_bytes(hw_params)); | |
189 | if (retval < 0) | |
190 | return retval; | |
4ede028f HCE |
191 | |
192 | /* Set restrictions to params. */ | |
193 | mutex_lock(&opened_mutex); | |
194 | chip->cur_rate = params_rate(hw_params); | |
195 | chip->cur_format = params_format(hw_params); | |
196 | mutex_unlock(&opened_mutex); | |
197 | ||
198 | return retval; | |
199 | } | |
200 | ||
4ede028f HCE |
201 | static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream) |
202 | { | |
203 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
204 | struct snd_pcm_runtime *runtime = substream->runtime; | |
7177395f | 205 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
128ed6a9 | 206 | unsigned long word = ac97c_readl(chip, OCA); |
4ede028f HCE |
207 | int retval; |
208 | ||
7177395f | 209 | chip->playback_period = 0; |
128ed6a9 HCE |
210 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
211 | ||
4ede028f HCE |
212 | /* assign channels to AC97C channel A */ |
213 | switch (runtime->channels) { | |
214 | case 1: | |
215 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); | |
216 | break; | |
217 | case 2: | |
218 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) | |
219 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); | |
220 | break; | |
221 | default: | |
222 | /* TODO: support more than two channels */ | |
223 | return -EINVAL; | |
4ede028f HCE |
224 | } |
225 | ac97c_writel(chip, OCA, word); | |
226 | ||
227 | /* configure sample format and size */ | |
ec2755a9 SG |
228 | word = ac97c_readl(chip, CAMR); |
229 | if (chip->opened <= 1) | |
230 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
231 | else | |
232 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
4ede028f HCE |
233 | |
234 | switch (runtime->format) { | |
235 | case SNDRV_PCM_FORMAT_S16_LE: | |
4ede028f HCE |
236 | break; |
237 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ | |
4ede028f HCE |
238 | word &= ~(AC97C_CMR_CEM_LITTLE); |
239 | break; | |
128ed6a9 HCE |
240 | default: |
241 | word = ac97c_readl(chip, OCA); | |
242 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); | |
243 | ac97c_writel(chip, OCA, word); | |
244 | return -EINVAL; | |
4ede028f HCE |
245 | } |
246 | ||
df163587 HCE |
247 | /* Enable underrun interrupt on channel A */ |
248 | word |= AC97C_CSR_UNRUN; | |
249 | ||
4ede028f HCE |
250 | ac97c_writel(chip, CAMR, word); |
251 | ||
df163587 HCE |
252 | /* Enable channel A event interrupt */ |
253 | word = ac97c_readl(chip, IMR); | |
254 | word |= AC97C_SR_CAEVT; | |
255 | ac97c_writel(chip, IER, word); | |
256 | ||
4ede028f HCE |
257 | /* set variable rate if needed */ |
258 | if (runtime->rate != 48000) { | |
259 | word = ac97c_readl(chip, MR); | |
260 | word |= AC97C_MR_VRA; | |
261 | ac97c_writel(chip, MR, word); | |
262 | } else { | |
263 | word = ac97c_readl(chip, MR); | |
264 | word &= ~(AC97C_MR_VRA); | |
265 | ac97c_writel(chip, MR, word); | |
266 | } | |
267 | ||
268 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, | |
269 | runtime->rate); | |
270 | if (retval) | |
271 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", | |
272 | runtime->rate); | |
273 | ||
020c5260 AS |
274 | /* Initialize and start the PDC */ |
275 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR); | |
276 | writel(block_size / 2, chip->regs + ATMEL_PDC_TCR); | |
277 | writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_TNPR); | |
278 | writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR); | |
4ede028f HCE |
279 | |
280 | return retval; | |
281 | } | |
282 | ||
283 | static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream) | |
284 | { | |
285 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
286 | struct snd_pcm_runtime *runtime = substream->runtime; | |
7177395f | 287 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
128ed6a9 | 288 | unsigned long word = ac97c_readl(chip, ICA); |
4ede028f HCE |
289 | int retval; |
290 | ||
7177395f | 291 | chip->capture_period = 0; |
128ed6a9 HCE |
292 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
293 | ||
4ede028f HCE |
294 | /* assign channels to AC97C channel A */ |
295 | switch (runtime->channels) { | |
296 | case 1: | |
297 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); | |
298 | break; | |
299 | case 2: | |
300 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) | |
301 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); | |
302 | break; | |
303 | default: | |
304 | /* TODO: support more than two channels */ | |
305 | return -EINVAL; | |
4ede028f HCE |
306 | } |
307 | ac97c_writel(chip, ICA, word); | |
308 | ||
309 | /* configure sample format and size */ | |
ec2755a9 SG |
310 | word = ac97c_readl(chip, CAMR); |
311 | if (chip->opened <= 1) | |
312 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
313 | else | |
314 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
4ede028f HCE |
315 | |
316 | switch (runtime->format) { | |
317 | case SNDRV_PCM_FORMAT_S16_LE: | |
4ede028f HCE |
318 | break; |
319 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ | |
4ede028f HCE |
320 | word &= ~(AC97C_CMR_CEM_LITTLE); |
321 | break; | |
128ed6a9 HCE |
322 | default: |
323 | word = ac97c_readl(chip, ICA); | |
324 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); | |
325 | ac97c_writel(chip, ICA, word); | |
326 | return -EINVAL; | |
4ede028f HCE |
327 | } |
328 | ||
df163587 HCE |
329 | /* Enable overrun interrupt on channel A */ |
330 | word |= AC97C_CSR_OVRUN; | |
331 | ||
4ede028f HCE |
332 | ac97c_writel(chip, CAMR, word); |
333 | ||
df163587 HCE |
334 | /* Enable channel A event interrupt */ |
335 | word = ac97c_readl(chip, IMR); | |
336 | word |= AC97C_SR_CAEVT; | |
337 | ac97c_writel(chip, IER, word); | |
338 | ||
4ede028f HCE |
339 | /* set variable rate if needed */ |
340 | if (runtime->rate != 48000) { | |
341 | word = ac97c_readl(chip, MR); | |
342 | word |= AC97C_MR_VRA; | |
343 | ac97c_writel(chip, MR, word); | |
344 | } else { | |
345 | word = ac97c_readl(chip, MR); | |
346 | word &= ~(AC97C_MR_VRA); | |
347 | ac97c_writel(chip, MR, word); | |
348 | } | |
349 | ||
350 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, | |
351 | runtime->rate); | |
352 | if (retval) | |
353 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", | |
354 | runtime->rate); | |
355 | ||
020c5260 AS |
356 | /* Initialize and start the PDC */ |
357 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR); | |
358 | writel(block_size / 2, chip->regs + ATMEL_PDC_RCR); | |
359 | writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_RNPR); | |
360 | writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR); | |
4ede028f HCE |
361 | |
362 | return retval; | |
363 | } | |
364 | ||
365 | static int | |
366 | atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd) | |
367 | { | |
368 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
7177395f | 369 | unsigned long camr, ptcr = 0; |
4ede028f HCE |
370 | |
371 | camr = ac97c_readl(chip, CAMR); | |
372 | ||
373 | switch (cmd) { | |
374 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ | |
375 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ | |
376 | case SNDRV_PCM_TRIGGER_START: | |
020c5260 | 377 | ptcr = ATMEL_PDC_TXTEN; |
ec2755a9 | 378 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX; |
4ede028f HCE |
379 | break; |
380 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ | |
381 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ | |
382 | case SNDRV_PCM_TRIGGER_STOP: | |
020c5260 | 383 | ptcr |= ATMEL_PDC_TXTDIS; |
4ede028f HCE |
384 | if (chip->opened <= 1) |
385 | camr &= ~AC97C_CMR_CENA; | |
386 | break; | |
387 | default: | |
020c5260 | 388 | return -EINVAL; |
4ede028f HCE |
389 | } |
390 | ||
391 | ac97c_writel(chip, CAMR, camr); | |
020c5260 AS |
392 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
393 | return 0; | |
4ede028f HCE |
394 | } |
395 | ||
396 | static int | |
397 | atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd) | |
398 | { | |
399 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
7177395f | 400 | unsigned long camr, ptcr = 0; |
4ede028f HCE |
401 | |
402 | camr = ac97c_readl(chip, CAMR); | |
7177395f | 403 | ptcr = readl(chip->regs + ATMEL_PDC_PTSR); |
4ede028f HCE |
404 | |
405 | switch (cmd) { | |
406 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ | |
407 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ | |
408 | case SNDRV_PCM_TRIGGER_START: | |
020c5260 | 409 | ptcr = ATMEL_PDC_RXTEN; |
ec2755a9 | 410 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX; |
4ede028f HCE |
411 | break; |
412 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ | |
413 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ | |
414 | case SNDRV_PCM_TRIGGER_STOP: | |
020c5260 | 415 | ptcr |= ATMEL_PDC_RXTDIS; |
4ede028f HCE |
416 | if (chip->opened <= 1) |
417 | camr &= ~AC97C_CMR_CENA; | |
418 | break; | |
419 | default: | |
020c5260 | 420 | return -EINVAL; |
4ede028f HCE |
421 | } |
422 | ||
423 | ac97c_writel(chip, CAMR, camr); | |
020c5260 AS |
424 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
425 | return 0; | |
4ede028f HCE |
426 | } |
427 | ||
428 | static snd_pcm_uframes_t | |
429 | atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream) | |
430 | { | |
431 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
432 | struct snd_pcm_runtime *runtime = substream->runtime; | |
433 | snd_pcm_uframes_t frames; | |
434 | unsigned long bytes; | |
435 | ||
020c5260 | 436 | bytes = readl(chip->regs + ATMEL_PDC_TPR); |
4ede028f HCE |
437 | bytes -= runtime->dma_addr; |
438 | ||
439 | frames = bytes_to_frames(runtime, bytes); | |
440 | if (frames >= runtime->buffer_size) | |
441 | frames -= runtime->buffer_size; | |
442 | return frames; | |
443 | } | |
444 | ||
445 | static snd_pcm_uframes_t | |
446 | atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream) | |
447 | { | |
448 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
449 | struct snd_pcm_runtime *runtime = substream->runtime; | |
450 | snd_pcm_uframes_t frames; | |
451 | unsigned long bytes; | |
452 | ||
020c5260 | 453 | bytes = readl(chip->regs + ATMEL_PDC_RPR); |
4ede028f HCE |
454 | bytes -= runtime->dma_addr; |
455 | ||
456 | frames = bytes_to_frames(runtime, bytes); | |
457 | if (frames >= runtime->buffer_size) | |
458 | frames -= runtime->buffer_size; | |
459 | return frames; | |
460 | } | |
461 | ||
10863737 | 462 | static const struct snd_pcm_ops atmel_ac97_playback_ops = { |
4ede028f HCE |
463 | .open = atmel_ac97c_playback_open, |
464 | .close = atmel_ac97c_playback_close, | |
465 | .ioctl = snd_pcm_lib_ioctl, | |
466 | .hw_params = atmel_ac97c_playback_hw_params, | |
020c5260 | 467 | .hw_free = snd_pcm_lib_free_pages, |
4ede028f HCE |
468 | .prepare = atmel_ac97c_playback_prepare, |
469 | .trigger = atmel_ac97c_playback_trigger, | |
470 | .pointer = atmel_ac97c_playback_pointer, | |
471 | }; | |
472 | ||
10863737 | 473 | static const struct snd_pcm_ops atmel_ac97_capture_ops = { |
4ede028f HCE |
474 | .open = atmel_ac97c_capture_open, |
475 | .close = atmel_ac97c_capture_close, | |
476 | .ioctl = snd_pcm_lib_ioctl, | |
477 | .hw_params = atmel_ac97c_capture_hw_params, | |
020c5260 | 478 | .hw_free = snd_pcm_lib_free_pages, |
4ede028f HCE |
479 | .prepare = atmel_ac97c_capture_prepare, |
480 | .trigger = atmel_ac97c_capture_trigger, | |
481 | .pointer = atmel_ac97c_capture_pointer, | |
482 | }; | |
483 | ||
df163587 HCE |
484 | static irqreturn_t atmel_ac97c_interrupt(int irq, void *dev) |
485 | { | |
486 | struct atmel_ac97c *chip = (struct atmel_ac97c *)dev; | |
487 | irqreturn_t retval = IRQ_NONE; | |
488 | u32 sr = ac97c_readl(chip, SR); | |
489 | u32 casr = ac97c_readl(chip, CASR); | |
490 | u32 cosr = ac97c_readl(chip, COSR); | |
7177395f | 491 | u32 camr = ac97c_readl(chip, CAMR); |
df163587 HCE |
492 | |
493 | if (sr & AC97C_SR_CAEVT) { | |
7177395f SG |
494 | struct snd_pcm_runtime *runtime; |
495 | int offset, next_period, block_size; | |
f5341163 | 496 | dev_dbg(&chip->pdev->dev, "channel A event%s%s%s%s%s%s\n", |
df163587 HCE |
497 | casr & AC97C_CSR_OVRUN ? " OVRUN" : "", |
498 | casr & AC97C_CSR_RXRDY ? " RXRDY" : "", | |
499 | casr & AC97C_CSR_UNRUN ? " UNRUN" : "", | |
500 | casr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", | |
501 | casr & AC97C_CSR_TXRDY ? " TXRDY" : "", | |
502 | !casr ? " NONE" : ""); | |
020c5260 AS |
503 | if ((casr & camr) & AC97C_CSR_ENDTX) { |
504 | runtime = chip->playback_substream->runtime; | |
505 | block_size = frames_to_bytes(runtime, runtime->period_size); | |
506 | chip->playback_period++; | |
507 | ||
508 | if (chip->playback_period == runtime->periods) | |
509 | chip->playback_period = 0; | |
510 | next_period = chip->playback_period + 1; | |
511 | if (next_period == runtime->periods) | |
512 | next_period = 0; | |
513 | ||
514 | offset = block_size * next_period; | |
515 | ||
516 | writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_TNPR); | |
517 | writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR); | |
518 | ||
519 | snd_pcm_period_elapsed(chip->playback_substream); | |
520 | } | |
521 | if ((casr & camr) & AC97C_CSR_ENDRX) { | |
522 | runtime = chip->capture_substream->runtime; | |
523 | block_size = frames_to_bytes(runtime, runtime->period_size); | |
524 | chip->capture_period++; | |
525 | ||
526 | if (chip->capture_period == runtime->periods) | |
527 | chip->capture_period = 0; | |
528 | next_period = chip->capture_period + 1; | |
529 | if (next_period == runtime->periods) | |
530 | next_period = 0; | |
531 | ||
532 | offset = block_size * next_period; | |
533 | ||
534 | writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_RNPR); | |
535 | writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR); | |
536 | snd_pcm_period_elapsed(chip->capture_substream); | |
7177395f | 537 | } |
df163587 HCE |
538 | retval = IRQ_HANDLED; |
539 | } | |
540 | ||
541 | if (sr & AC97C_SR_COEVT) { | |
542 | dev_info(&chip->pdev->dev, "codec channel event%s%s%s%s%s\n", | |
543 | cosr & AC97C_CSR_OVRUN ? " OVRUN" : "", | |
544 | cosr & AC97C_CSR_RXRDY ? " RXRDY" : "", | |
545 | cosr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", | |
546 | cosr & AC97C_CSR_TXRDY ? " TXRDY" : "", | |
547 | !cosr ? " NONE" : ""); | |
548 | retval = IRQ_HANDLED; | |
549 | } | |
550 | ||
551 | if (retval == IRQ_NONE) { | |
552 | dev_err(&chip->pdev->dev, "spurious interrupt sr 0x%08x " | |
553 | "casr 0x%08x cosr 0x%08x\n", sr, casr, cosr); | |
554 | } | |
555 | ||
556 | return retval; | |
557 | } | |
558 | ||
3ca8590b | 559 | static const struct ac97_pcm at91_ac97_pcm_defs[] = { |
7177395f SG |
560 | /* Playback */ |
561 | { | |
562 | .exclusive = 1, | |
563 | .r = { { | |
564 | .slots = ((1 << AC97_SLOT_PCM_LEFT) | |
565 | | (1 << AC97_SLOT_PCM_RIGHT)), | |
566 | } }, | |
567 | }, | |
568 | /* PCM in */ | |
569 | { | |
570 | .stream = 1, | |
571 | .exclusive = 1, | |
572 | .r = { { | |
573 | .slots = ((1 << AC97_SLOT_PCM_LEFT) | |
574 | | (1 << AC97_SLOT_PCM_RIGHT)), | |
575 | } } | |
576 | }, | |
577 | /* Mic in */ | |
578 | { | |
579 | .stream = 1, | |
580 | .exclusive = 1, | |
581 | .r = { { | |
582 | .slots = (1<<AC97_SLOT_MIC), | |
583 | } } | |
584 | }, | |
585 | }; | |
586 | ||
61dc674c | 587 | static int atmel_ac97c_pcm_new(struct atmel_ac97c *chip) |
4ede028f HCE |
588 | { |
589 | struct snd_pcm *pcm; | |
590 | struct snd_pcm_hardware hw = atmel_ac97c_hw; | |
020c5260 | 591 | int retval; |
4ede028f | 592 | |
020c5260 AS |
593 | retval = snd_ac97_pcm_assign(chip->ac97_bus, |
594 | ARRAY_SIZE(at91_ac97_pcm_defs), | |
595 | at91_ac97_pcm_defs); | |
596 | if (retval) | |
597 | return retval; | |
4ede028f | 598 | |
020c5260 | 599 | retval = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm); |
4ede028f HCE |
600 | if (retval) |
601 | return retval; | |
602 | ||
020c5260 AS |
603 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &atmel_ac97_capture_ops); |
604 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &atmel_ac97_playback_ops); | |
4ede028f | 605 | |
e6e8c82b | 606 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, |
4ede028f HCE |
607 | &chip->pdev->dev, hw.periods_min * hw.period_bytes_min, |
608 | hw.buffer_bytes_max); | |
4ede028f HCE |
609 | |
610 | pcm->private_data = chip; | |
611 | pcm->info_flags = 0; | |
612 | strcpy(pcm->name, chip->card->shortname); | |
613 | chip->pcm = pcm; | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
618 | static int atmel_ac97c_mixer_new(struct atmel_ac97c *chip) | |
619 | { | |
620 | struct snd_ac97_template template; | |
621 | memset(&template, 0, sizeof(template)); | |
622 | template.private_data = chip; | |
623 | return snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97); | |
624 | } | |
625 | ||
626 | static void atmel_ac97c_write(struct snd_ac97 *ac97, unsigned short reg, | |
627 | unsigned short val) | |
628 | { | |
629 | struct atmel_ac97c *chip = get_chip(ac97); | |
630 | unsigned long word; | |
631 | int timeout = 40; | |
632 | ||
633 | word = (reg & 0x7f) << 16 | val; | |
634 | ||
635 | do { | |
636 | if (ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) { | |
637 | ac97c_writel(chip, COTHR, word); | |
638 | return; | |
639 | } | |
640 | udelay(1); | |
641 | } while (--timeout); | |
642 | ||
643 | dev_dbg(&chip->pdev->dev, "codec write timeout\n"); | |
644 | } | |
645 | ||
646 | static unsigned short atmel_ac97c_read(struct snd_ac97 *ac97, | |
647 | unsigned short reg) | |
648 | { | |
649 | struct atmel_ac97c *chip = get_chip(ac97); | |
650 | unsigned long word; | |
651 | int timeout = 40; | |
652 | int write = 10; | |
653 | ||
654 | word = (0x80 | (reg & 0x7f)) << 16; | |
655 | ||
656 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) | |
657 | ac97c_readl(chip, CORHR); | |
658 | ||
659 | retry_write: | |
660 | timeout = 40; | |
661 | ||
662 | do { | |
663 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) != 0) { | |
664 | ac97c_writel(chip, COTHR, word); | |
665 | goto read_reg; | |
666 | } | |
667 | udelay(10); | |
668 | } while (--timeout); | |
669 | ||
670 | if (!--write) | |
671 | goto timed_out; | |
672 | goto retry_write; | |
673 | ||
674 | read_reg: | |
675 | do { | |
676 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) { | |
677 | unsigned short val = ac97c_readl(chip, CORHR); | |
678 | return val; | |
679 | } | |
680 | udelay(10); | |
681 | } while (--timeout); | |
682 | ||
683 | if (!--write) | |
684 | goto timed_out; | |
685 | goto retry_write; | |
686 | ||
687 | timed_out: | |
688 | dev_dbg(&chip->pdev->dev, "codec read timeout\n"); | |
689 | return 0xffff; | |
690 | } | |
691 | ||
4ede028f HCE |
692 | static void atmel_ac97c_reset(struct atmel_ac97c *chip) |
693 | { | |
81baf3a7 HCE |
694 | ac97c_writel(chip, MR, 0); |
695 | ac97c_writel(chip, MR, AC97C_MR_ENA); | |
696 | ac97c_writel(chip, CAMR, 0); | |
697 | ac97c_writel(chip, COMR, 0); | |
4ede028f | 698 | |
5f10e849 AS |
699 | if (!IS_ERR(chip->reset_pin)) { |
700 | gpiod_set_value(chip->reset_pin, 0); | |
4ede028f | 701 | /* AC97 v2.2 specifications says minimum 1 us. */ |
81baf3a7 | 702 | udelay(2); |
5f10e849 | 703 | gpiod_set_value(chip->reset_pin, 1); |
8015e3de BS |
704 | } else { |
705 | ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA); | |
706 | udelay(2); | |
707 | ac97c_writel(chip, MR, AC97C_MR_ENA); | |
4ede028f | 708 | } |
4ede028f HCE |
709 | } |
710 | ||
b2d8957f AS |
711 | static const struct of_device_id atmel_ac97c_dt_ids[] = { |
712 | { .compatible = "atmel,at91sam9263-ac97c", }, | |
713 | { } | |
714 | }; | |
715 | MODULE_DEVICE_TABLE(of, atmel_ac97c_dt_ids); | |
716 | ||
61dc674c | 717 | static int atmel_ac97c_probe(struct platform_device *pdev) |
4ede028f | 718 | { |
5f10e849 | 719 | struct device *dev = &pdev->dev; |
4ede028f HCE |
720 | struct snd_card *card; |
721 | struct atmel_ac97c *chip; | |
722 | struct resource *regs; | |
4ede028f HCE |
723 | struct clk *pclk; |
724 | static struct snd_ac97_bus_ops ops = { | |
725 | .write = atmel_ac97c_write, | |
726 | .read = atmel_ac97c_read, | |
727 | }; | |
728 | int retval; | |
df163587 | 729 | int irq; |
4ede028f HCE |
730 | |
731 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
732 | if (!regs) { | |
733 | dev_dbg(&pdev->dev, "no memory resource\n"); | |
734 | return -ENXIO; | |
735 | } | |
736 | ||
df163587 HCE |
737 | irq = platform_get_irq(pdev, 0); |
738 | if (irq < 0) { | |
77201135 GS |
739 | dev_dbg(&pdev->dev, "could not get irq: %d\n", irq); |
740 | return irq; | |
df163587 HCE |
741 | } |
742 | ||
020c5260 | 743 | pclk = clk_get(&pdev->dev, "ac97_clk"); |
4ede028f HCE |
744 | if (IS_ERR(pclk)) { |
745 | dev_dbg(&pdev->dev, "no peripheral clock\n"); | |
746 | return PTR_ERR(pclk); | |
747 | } | |
260ea95c AY |
748 | retval = clk_prepare_enable(pclk); |
749 | if (retval) | |
0515760f | 750 | goto err_prepare_enable; |
4ede028f | 751 | |
a4f2473d TI |
752 | retval = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1, |
753 | SNDRV_DEFAULT_STR1, THIS_MODULE, | |
754 | sizeof(struct atmel_ac97c), &card); | |
4ede028f HCE |
755 | if (retval) { |
756 | dev_dbg(&pdev->dev, "could not create sound card device\n"); | |
757 | goto err_snd_card_new; | |
758 | } | |
759 | ||
760 | chip = get_chip(card); | |
761 | ||
df163587 HCE |
762 | retval = request_irq(irq, atmel_ac97c_interrupt, 0, "AC97C", chip); |
763 | if (retval) { | |
764 | dev_dbg(&pdev->dev, "unable to request irq %d\n", irq); | |
765 | goto err_request_irq; | |
766 | } | |
767 | chip->irq = irq; | |
768 | ||
4ede028f HCE |
769 | spin_lock_init(&chip->lock); |
770 | ||
771 | strcpy(card->driver, "Atmel AC97C"); | |
772 | strcpy(card->shortname, "Atmel AC97C"); | |
773 | sprintf(card->longname, "Atmel AC97 controller"); | |
774 | ||
775 | chip->card = card; | |
776 | chip->pclk = pclk; | |
777 | chip->pdev = pdev; | |
28f65c11 | 778 | chip->regs = ioremap(regs->start, resource_size(regs)); |
4ede028f HCE |
779 | |
780 | if (!chip->regs) { | |
781 | dev_dbg(&pdev->dev, "could not remap register memory\n"); | |
0c23e46e | 782 | retval = -ENOMEM; |
4ede028f HCE |
783 | goto err_ioremap; |
784 | } | |
785 | ||
5f10e849 AS |
786 | chip->reset_pin = devm_gpiod_get_index(dev, "ac97", 2, GPIOD_OUT_HIGH); |
787 | if (IS_ERR(chip->reset_pin)) | |
788 | dev_dbg(dev, "reset pin not available\n"); | |
4ede028f | 789 | |
81baf3a7 HCE |
790 | atmel_ac97c_reset(chip); |
791 | ||
df163587 HCE |
792 | /* Enable overrun interrupt from codec channel */ |
793 | ac97c_writel(chip, COMR, AC97C_CSR_OVRUN); | |
794 | ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT); | |
795 | ||
4ede028f HCE |
796 | retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus); |
797 | if (retval) { | |
798 | dev_dbg(&pdev->dev, "could not register on ac97 bus\n"); | |
799 | goto err_ac97_bus; | |
800 | } | |
801 | ||
4ede028f HCE |
802 | retval = atmel_ac97c_mixer_new(chip); |
803 | if (retval) { | |
804 | dev_dbg(&pdev->dev, "could not register ac97 mixer\n"); | |
805 | goto err_ac97_bus; | |
806 | } | |
807 | ||
4ede028f HCE |
808 | retval = atmel_ac97c_pcm_new(chip); |
809 | if (retval) { | |
810 | dev_dbg(&pdev->dev, "could not register ac97 pcm device\n"); | |
020c5260 | 811 | goto err_ac97_bus; |
4ede028f HCE |
812 | } |
813 | ||
814 | retval = snd_card_register(card); | |
815 | if (retval) { | |
816 | dev_dbg(&pdev->dev, "could not register sound card\n"); | |
020c5260 | 817 | goto err_ac97_bus; |
4ede028f HCE |
818 | } |
819 | ||
820 | platform_set_drvdata(pdev, card); | |
821 | ||
7177395f SG |
822 | dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n", |
823 | chip->regs, irq); | |
4ede028f HCE |
824 | |
825 | return 0; | |
826 | ||
4ede028f | 827 | err_ac97_bus: |
4ede028f HCE |
828 | iounmap(chip->regs); |
829 | err_ioremap: | |
df163587 HCE |
830 | free_irq(irq, chip); |
831 | err_request_irq: | |
4ede028f HCE |
832 | snd_card_free(card); |
833 | err_snd_card_new: | |
1132015b | 834 | clk_disable_unprepare(pclk); |
0515760f | 835 | err_prepare_enable: |
4ede028f HCE |
836 | clk_put(pclk); |
837 | return retval; | |
838 | } | |
839 | ||
d34e4e00 | 840 | #ifdef CONFIG_PM_SLEEP |
284e7ca7 | 841 | static int atmel_ac97c_suspend(struct device *pdev) |
4ede028f | 842 | { |
284e7ca7 | 843 | struct snd_card *card = dev_get_drvdata(pdev); |
4ede028f HCE |
844 | struct atmel_ac97c *chip = card->private_data; |
845 | ||
1132015b | 846 | clk_disable_unprepare(chip->pclk); |
4ede028f HCE |
847 | return 0; |
848 | } | |
849 | ||
284e7ca7 | 850 | static int atmel_ac97c_resume(struct device *pdev) |
4ede028f | 851 | { |
284e7ca7 | 852 | struct snd_card *card = dev_get_drvdata(pdev); |
4ede028f | 853 | struct atmel_ac97c *chip = card->private_data; |
260ea95c | 854 | int ret = clk_prepare_enable(chip->pclk); |
4ede028f | 855 | |
260ea95c | 856 | return ret; |
4ede028f | 857 | } |
284e7ca7 TI |
858 | |
859 | static SIMPLE_DEV_PM_OPS(atmel_ac97c_pm, atmel_ac97c_suspend, atmel_ac97c_resume); | |
860 | #define ATMEL_AC97C_PM_OPS &atmel_ac97c_pm | |
4ede028f | 861 | #else |
284e7ca7 | 862 | #define ATMEL_AC97C_PM_OPS NULL |
4ede028f HCE |
863 | #endif |
864 | ||
61dc674c | 865 | static int atmel_ac97c_remove(struct platform_device *pdev) |
4ede028f HCE |
866 | { |
867 | struct snd_card *card = platform_get_drvdata(pdev); | |
868 | struct atmel_ac97c *chip = get_chip(card); | |
869 | ||
bd74a184 HCE |
870 | ac97c_writel(chip, CAMR, 0); |
871 | ac97c_writel(chip, COMR, 0); | |
872 | ac97c_writel(chip, MR, 0); | |
873 | ||
1132015b | 874 | clk_disable_unprepare(chip->pclk); |
4ede028f HCE |
875 | clk_put(chip->pclk); |
876 | iounmap(chip->regs); | |
df163587 | 877 | free_irq(chip->irq, chip); |
4ede028f | 878 | |
4ede028f HCE |
879 | snd_card_free(card); |
880 | ||
4ede028f HCE |
881 | return 0; |
882 | } | |
883 | ||
884 | static struct platform_driver atmel_ac97c_driver = { | |
4b973ee0 | 885 | .probe = atmel_ac97c_probe, |
61dc674c | 886 | .remove = atmel_ac97c_remove, |
4ede028f HCE |
887 | .driver = { |
888 | .name = "atmel_ac97c", | |
284e7ca7 | 889 | .pm = ATMEL_AC97C_PM_OPS, |
5f10e849 | 890 | .of_match_table = atmel_ac97c_dt_ids, |
4ede028f | 891 | }, |
4ede028f | 892 | }; |
4b973ee0 | 893 | module_platform_driver(atmel_ac97c_driver); |
4ede028f HCE |
894 | |
895 | MODULE_LICENSE("GPL"); | |
896 | MODULE_DESCRIPTION("Driver for Atmel AC97 controller"); | |
0cfae7c9 | 897 | MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>"); |