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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> |
4ede028f HCE |
14 | #include <linux/dmaengine.h> |
15 | #include <linux/dma-mapping.h> | |
7177395f | 16 | #include <linux/atmel_pdc.h> |
4ede028f HCE |
17 | #include <linux/init.h> |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/mutex.h> | |
22 | #include <linux/gpio.h> | |
e2b35f3d | 23 | #include <linux/types.h> |
4ede028f HCE |
24 | #include <linux/io.h> |
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> | |
31 | #include <sound/atmel-ac97c.h> | |
32 | #include <sound/memalloc.h> | |
33 | ||
34 | #include <linux/dw_dmac.h> | |
35 | ||
7177395f | 36 | #include <mach/cpu.h> |
7177395f SG |
37 | #include <mach/gpio.h> |
38 | ||
fd76804f HCE |
39 | #ifdef CONFIG_ARCH_AT91 |
40 | #include <mach/hardware.h> | |
41 | #endif | |
42 | ||
4ede028f HCE |
43 | #include "ac97c.h" |
44 | ||
45 | enum { | |
46 | DMA_TX_READY = 0, | |
47 | DMA_RX_READY, | |
48 | DMA_TX_CHAN_PRESENT, | |
49 | DMA_RX_CHAN_PRESENT, | |
50 | }; | |
51 | ||
52 | /* Serialize access to opened variable */ | |
53 | static DEFINE_MUTEX(opened_mutex); | |
54 | ||
55 | struct atmel_ac97c_dma { | |
56 | struct dma_chan *rx_chan; | |
57 | struct dma_chan *tx_chan; | |
58 | }; | |
59 | ||
60 | struct atmel_ac97c { | |
61 | struct clk *pclk; | |
62 | struct platform_device *pdev; | |
63 | struct atmel_ac97c_dma dma; | |
64 | ||
65 | struct snd_pcm_substream *playback_substream; | |
66 | struct snd_pcm_substream *capture_substream; | |
67 | struct snd_card *card; | |
68 | struct snd_pcm *pcm; | |
69 | struct snd_ac97 *ac97; | |
70 | struct snd_ac97_bus *ac97_bus; | |
71 | ||
72 | u64 cur_format; | |
73 | unsigned int cur_rate; | |
74 | unsigned long flags; | |
7177395f | 75 | int playback_period, capture_period; |
4ede028f HCE |
76 | /* Serialize access to opened variable */ |
77 | spinlock_t lock; | |
78 | void __iomem *regs; | |
df163587 | 79 | int irq; |
4ede028f HCE |
80 | int opened; |
81 | int reset_pin; | |
82 | }; | |
83 | ||
84 | #define get_chip(card) ((struct atmel_ac97c *)(card)->private_data) | |
85 | ||
86 | #define ac97c_writel(chip, reg, val) \ | |
87 | __raw_writel((val), (chip)->regs + AC97C_##reg) | |
88 | #define ac97c_readl(chip, reg) \ | |
89 | __raw_readl((chip)->regs + AC97C_##reg) | |
90 | ||
91 | /* This function is called by the DMA driver. */ | |
92 | static void atmel_ac97c_dma_playback_period_done(void *arg) | |
93 | { | |
94 | struct atmel_ac97c *chip = arg; | |
95 | snd_pcm_period_elapsed(chip->playback_substream); | |
96 | } | |
97 | ||
98 | static void atmel_ac97c_dma_capture_period_done(void *arg) | |
99 | { | |
100 | struct atmel_ac97c *chip = arg; | |
101 | snd_pcm_period_elapsed(chip->capture_substream); | |
102 | } | |
103 | ||
104 | static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip, | |
105 | struct snd_pcm_substream *substream, | |
35e16581 | 106 | enum dma_transfer_direction direction) |
4ede028f HCE |
107 | { |
108 | struct dma_chan *chan; | |
109 | struct dw_cyclic_desc *cdesc; | |
110 | struct snd_pcm_runtime *runtime = substream->runtime; | |
111 | unsigned long buffer_len, period_len; | |
112 | ||
113 | /* | |
114 | * We don't do DMA on "complex" transfers, i.e. with | |
115 | * non-halfword-aligned buffers or lengths. | |
116 | */ | |
117 | if (runtime->dma_addr & 1 || runtime->buffer_size & 1) { | |
118 | dev_dbg(&chip->pdev->dev, "too complex transfer\n"); | |
119 | return -EINVAL; | |
120 | } | |
121 | ||
35e16581 | 122 | if (direction == DMA_MEM_TO_DEV) |
4ede028f HCE |
123 | chan = chip->dma.tx_chan; |
124 | else | |
125 | chan = chip->dma.rx_chan; | |
126 | ||
127 | buffer_len = frames_to_bytes(runtime, runtime->buffer_size); | |
128 | period_len = frames_to_bytes(runtime, runtime->period_size); | |
129 | ||
130 | cdesc = dw_dma_cyclic_prep(chan, runtime->dma_addr, buffer_len, | |
131 | period_len, direction); | |
132 | if (IS_ERR(cdesc)) { | |
133 | dev_dbg(&chip->pdev->dev, "could not prepare cyclic DMA\n"); | |
134 | return PTR_ERR(cdesc); | |
135 | } | |
136 | ||
35e16581 | 137 | if (direction == DMA_MEM_TO_DEV) { |
4ede028f HCE |
138 | cdesc->period_callback = atmel_ac97c_dma_playback_period_done; |
139 | set_bit(DMA_TX_READY, &chip->flags); | |
140 | } else { | |
141 | cdesc->period_callback = atmel_ac97c_dma_capture_period_done; | |
142 | set_bit(DMA_RX_READY, &chip->flags); | |
143 | } | |
144 | ||
145 | cdesc->period_callback_param = chip; | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | static struct snd_pcm_hardware atmel_ac97c_hw = { | |
151 | .info = (SNDRV_PCM_INFO_MMAP | |
152 | | SNDRV_PCM_INFO_MMAP_VALID | |
153 | | SNDRV_PCM_INFO_INTERLEAVED | |
154 | | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
155 | | SNDRV_PCM_INFO_JOINT_DUPLEX | |
156 | | SNDRV_PCM_INFO_RESUME | |
157 | | SNDRV_PCM_INFO_PAUSE), | |
158 | .formats = (SNDRV_PCM_FMTBIT_S16_BE | |
159 | | SNDRV_PCM_FMTBIT_S16_LE), | |
160 | .rates = (SNDRV_PCM_RATE_CONTINUOUS), | |
161 | .rate_min = 4000, | |
162 | .rate_max = 48000, | |
163 | .channels_min = 1, | |
164 | .channels_max = 2, | |
c42eec0f | 165 | .buffer_bytes_max = 2 * 2 * 64 * 2048, |
4ede028f HCE |
166 | .period_bytes_min = 4096, |
167 | .period_bytes_max = 4096, | |
c42eec0f | 168 | .periods_min = 6, |
4ede028f HCE |
169 | .periods_max = 64, |
170 | }; | |
171 | ||
172 | static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream) | |
173 | { | |
174 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
175 | struct snd_pcm_runtime *runtime = substream->runtime; | |
176 | ||
177 | mutex_lock(&opened_mutex); | |
178 | chip->opened++; | |
179 | runtime->hw = atmel_ac97c_hw; | |
180 | if (chip->cur_rate) { | |
181 | runtime->hw.rate_min = chip->cur_rate; | |
182 | runtime->hw.rate_max = chip->cur_rate; | |
183 | } | |
184 | if (chip->cur_format) | |
185 | runtime->hw.formats = (1ULL << chip->cur_format); | |
186 | mutex_unlock(&opened_mutex); | |
187 | chip->playback_substream = substream; | |
188 | return 0; | |
189 | } | |
190 | ||
191 | static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream) | |
192 | { | |
193 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
194 | struct snd_pcm_runtime *runtime = substream->runtime; | |
195 | ||
196 | mutex_lock(&opened_mutex); | |
197 | chip->opened++; | |
198 | runtime->hw = atmel_ac97c_hw; | |
199 | if (chip->cur_rate) { | |
200 | runtime->hw.rate_min = chip->cur_rate; | |
201 | runtime->hw.rate_max = chip->cur_rate; | |
202 | } | |
203 | if (chip->cur_format) | |
204 | runtime->hw.formats = (1ULL << chip->cur_format); | |
205 | mutex_unlock(&opened_mutex); | |
206 | chip->capture_substream = substream; | |
207 | return 0; | |
208 | } | |
209 | ||
210 | static int atmel_ac97c_playback_close(struct snd_pcm_substream *substream) | |
211 | { | |
212 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
213 | ||
214 | mutex_lock(&opened_mutex); | |
215 | chip->opened--; | |
216 | if (!chip->opened) { | |
217 | chip->cur_rate = 0; | |
218 | chip->cur_format = 0; | |
219 | } | |
220 | mutex_unlock(&opened_mutex); | |
221 | ||
222 | chip->playback_substream = NULL; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | static int atmel_ac97c_capture_close(struct snd_pcm_substream *substream) | |
228 | { | |
229 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
230 | ||
231 | mutex_lock(&opened_mutex); | |
232 | chip->opened--; | |
233 | if (!chip->opened) { | |
234 | chip->cur_rate = 0; | |
235 | chip->cur_format = 0; | |
236 | } | |
237 | mutex_unlock(&opened_mutex); | |
238 | ||
239 | chip->capture_substream = NULL; | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream, | |
245 | struct snd_pcm_hw_params *hw_params) | |
246 | { | |
247 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
248 | int retval; | |
249 | ||
250 | retval = snd_pcm_lib_malloc_pages(substream, | |
251 | params_buffer_bytes(hw_params)); | |
252 | if (retval < 0) | |
253 | return retval; | |
254 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ | |
7177395f SG |
255 | if (cpu_is_at32ap7000()) { |
256 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ | |
257 | if (retval == 1) | |
258 | if (test_and_clear_bit(DMA_TX_READY, &chip->flags)) | |
259 | dw_dma_cyclic_free(chip->dma.tx_chan); | |
260 | } | |
4ede028f HCE |
261 | /* Set restrictions to params. */ |
262 | mutex_lock(&opened_mutex); | |
263 | chip->cur_rate = params_rate(hw_params); | |
264 | chip->cur_format = params_format(hw_params); | |
265 | mutex_unlock(&opened_mutex); | |
266 | ||
267 | return retval; | |
268 | } | |
269 | ||
270 | static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream, | |
271 | struct snd_pcm_hw_params *hw_params) | |
272 | { | |
273 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
274 | int retval; | |
275 | ||
276 | retval = snd_pcm_lib_malloc_pages(substream, | |
277 | params_buffer_bytes(hw_params)); | |
278 | if (retval < 0) | |
279 | return retval; | |
280 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ | |
7177395f SG |
281 | if (cpu_is_at32ap7000()) { |
282 | if (retval < 0) | |
283 | return retval; | |
284 | /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ | |
285 | if (retval == 1) | |
286 | if (test_and_clear_bit(DMA_RX_READY, &chip->flags)) | |
287 | dw_dma_cyclic_free(chip->dma.rx_chan); | |
288 | } | |
4ede028f HCE |
289 | |
290 | /* Set restrictions to params. */ | |
291 | mutex_lock(&opened_mutex); | |
292 | chip->cur_rate = params_rate(hw_params); | |
293 | chip->cur_format = params_format(hw_params); | |
294 | mutex_unlock(&opened_mutex); | |
295 | ||
296 | return retval; | |
297 | } | |
298 | ||
299 | static int atmel_ac97c_playback_hw_free(struct snd_pcm_substream *substream) | |
300 | { | |
301 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
7177395f SG |
302 | if (cpu_is_at32ap7000()) { |
303 | if (test_and_clear_bit(DMA_TX_READY, &chip->flags)) | |
304 | dw_dma_cyclic_free(chip->dma.tx_chan); | |
305 | } | |
4ede028f HCE |
306 | return snd_pcm_lib_free_pages(substream); |
307 | } | |
308 | ||
309 | static int atmel_ac97c_capture_hw_free(struct snd_pcm_substream *substream) | |
310 | { | |
311 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
7177395f SG |
312 | if (cpu_is_at32ap7000()) { |
313 | if (test_and_clear_bit(DMA_RX_READY, &chip->flags)) | |
314 | dw_dma_cyclic_free(chip->dma.rx_chan); | |
315 | } | |
4ede028f HCE |
316 | return snd_pcm_lib_free_pages(substream); |
317 | } | |
318 | ||
319 | static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream) | |
320 | { | |
321 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
322 | struct snd_pcm_runtime *runtime = substream->runtime; | |
7177395f | 323 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
128ed6a9 | 324 | unsigned long word = ac97c_readl(chip, OCA); |
4ede028f HCE |
325 | int retval; |
326 | ||
7177395f | 327 | chip->playback_period = 0; |
128ed6a9 HCE |
328 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
329 | ||
4ede028f HCE |
330 | /* assign channels to AC97C channel A */ |
331 | switch (runtime->channels) { | |
332 | case 1: | |
333 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); | |
334 | break; | |
335 | case 2: | |
336 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) | |
337 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); | |
338 | break; | |
339 | default: | |
340 | /* TODO: support more than two channels */ | |
341 | return -EINVAL; | |
4ede028f HCE |
342 | } |
343 | ac97c_writel(chip, OCA, word); | |
344 | ||
345 | /* configure sample format and size */ | |
ec2755a9 SG |
346 | word = ac97c_readl(chip, CAMR); |
347 | if (chip->opened <= 1) | |
348 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
349 | else | |
350 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
4ede028f HCE |
351 | |
352 | switch (runtime->format) { | |
353 | case SNDRV_PCM_FORMAT_S16_LE: | |
7177395f SG |
354 | if (cpu_is_at32ap7000()) |
355 | word |= AC97C_CMR_CEM_LITTLE; | |
4ede028f HCE |
356 | break; |
357 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ | |
4ede028f HCE |
358 | word &= ~(AC97C_CMR_CEM_LITTLE); |
359 | break; | |
128ed6a9 HCE |
360 | default: |
361 | word = ac97c_readl(chip, OCA); | |
362 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); | |
363 | ac97c_writel(chip, OCA, word); | |
364 | return -EINVAL; | |
4ede028f HCE |
365 | } |
366 | ||
df163587 HCE |
367 | /* Enable underrun interrupt on channel A */ |
368 | word |= AC97C_CSR_UNRUN; | |
369 | ||
4ede028f HCE |
370 | ac97c_writel(chip, CAMR, word); |
371 | ||
df163587 HCE |
372 | /* Enable channel A event interrupt */ |
373 | word = ac97c_readl(chip, IMR); | |
374 | word |= AC97C_SR_CAEVT; | |
375 | ac97c_writel(chip, IER, word); | |
376 | ||
4ede028f HCE |
377 | /* set variable rate if needed */ |
378 | if (runtime->rate != 48000) { | |
379 | word = ac97c_readl(chip, MR); | |
380 | word |= AC97C_MR_VRA; | |
381 | ac97c_writel(chip, MR, word); | |
382 | } else { | |
383 | word = ac97c_readl(chip, MR); | |
384 | word &= ~(AC97C_MR_VRA); | |
385 | ac97c_writel(chip, MR, word); | |
386 | } | |
387 | ||
388 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, | |
389 | runtime->rate); | |
390 | if (retval) | |
391 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", | |
392 | runtime->rate); | |
393 | ||
7177395f SG |
394 | if (cpu_is_at32ap7000()) { |
395 | if (!test_bit(DMA_TX_READY, &chip->flags)) | |
396 | retval = atmel_ac97c_prepare_dma(chip, substream, | |
35e16581 | 397 | DMA_MEM_TO_DEV); |
7177395f SG |
398 | } else { |
399 | /* Initialize and start the PDC */ | |
400 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR); | |
401 | writel(block_size / 2, chip->regs + ATMEL_PDC_TCR); | |
402 | writel(runtime->dma_addr + block_size, | |
403 | chip->regs + ATMEL_PDC_TNPR); | |
404 | writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR); | |
405 | } | |
4ede028f HCE |
406 | |
407 | return retval; | |
408 | } | |
409 | ||
410 | static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream) | |
411 | { | |
412 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
413 | struct snd_pcm_runtime *runtime = substream->runtime; | |
7177395f | 414 | int block_size = frames_to_bytes(runtime, runtime->period_size); |
128ed6a9 | 415 | unsigned long word = ac97c_readl(chip, ICA); |
4ede028f HCE |
416 | int retval; |
417 | ||
7177395f | 418 | chip->capture_period = 0; |
128ed6a9 HCE |
419 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
420 | ||
4ede028f HCE |
421 | /* assign channels to AC97C channel A */ |
422 | switch (runtime->channels) { | |
423 | case 1: | |
424 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A); | |
425 | break; | |
426 | case 2: | |
427 | word |= AC97C_CH_ASSIGN(PCM_LEFT, A) | |
428 | | AC97C_CH_ASSIGN(PCM_RIGHT, A); | |
429 | break; | |
430 | default: | |
431 | /* TODO: support more than two channels */ | |
432 | return -EINVAL; | |
4ede028f HCE |
433 | } |
434 | ac97c_writel(chip, ICA, word); | |
435 | ||
436 | /* configure sample format and size */ | |
ec2755a9 SG |
437 | word = ac97c_readl(chip, CAMR); |
438 | if (chip->opened <= 1) | |
439 | word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
440 | else | |
441 | word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; | |
4ede028f HCE |
442 | |
443 | switch (runtime->format) { | |
444 | case SNDRV_PCM_FORMAT_S16_LE: | |
7177395f SG |
445 | if (cpu_is_at32ap7000()) |
446 | word |= AC97C_CMR_CEM_LITTLE; | |
4ede028f HCE |
447 | break; |
448 | case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ | |
4ede028f HCE |
449 | word &= ~(AC97C_CMR_CEM_LITTLE); |
450 | break; | |
128ed6a9 HCE |
451 | default: |
452 | word = ac97c_readl(chip, ICA); | |
453 | word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); | |
454 | ac97c_writel(chip, ICA, word); | |
455 | return -EINVAL; | |
4ede028f HCE |
456 | } |
457 | ||
df163587 HCE |
458 | /* Enable overrun interrupt on channel A */ |
459 | word |= AC97C_CSR_OVRUN; | |
460 | ||
4ede028f HCE |
461 | ac97c_writel(chip, CAMR, word); |
462 | ||
df163587 HCE |
463 | /* Enable channel A event interrupt */ |
464 | word = ac97c_readl(chip, IMR); | |
465 | word |= AC97C_SR_CAEVT; | |
466 | ac97c_writel(chip, IER, word); | |
467 | ||
4ede028f HCE |
468 | /* set variable rate if needed */ |
469 | if (runtime->rate != 48000) { | |
470 | word = ac97c_readl(chip, MR); | |
471 | word |= AC97C_MR_VRA; | |
472 | ac97c_writel(chip, MR, word); | |
473 | } else { | |
474 | word = ac97c_readl(chip, MR); | |
475 | word &= ~(AC97C_MR_VRA); | |
476 | ac97c_writel(chip, MR, word); | |
477 | } | |
478 | ||
479 | retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, | |
480 | runtime->rate); | |
481 | if (retval) | |
482 | dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", | |
483 | runtime->rate); | |
484 | ||
7177395f SG |
485 | if (cpu_is_at32ap7000()) { |
486 | if (!test_bit(DMA_RX_READY, &chip->flags)) | |
487 | retval = atmel_ac97c_prepare_dma(chip, substream, | |
35e16581 | 488 | DMA_DEV_TO_MEM); |
7177395f SG |
489 | } else { |
490 | /* Initialize and start the PDC */ | |
491 | writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR); | |
492 | writel(block_size / 2, chip->regs + ATMEL_PDC_RCR); | |
493 | writel(runtime->dma_addr + block_size, | |
494 | chip->regs + ATMEL_PDC_RNPR); | |
495 | writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR); | |
496 | } | |
4ede028f HCE |
497 | |
498 | return retval; | |
499 | } | |
500 | ||
501 | static int | |
502 | atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd) | |
503 | { | |
504 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
7177395f | 505 | unsigned long camr, ptcr = 0; |
4ede028f HCE |
506 | int retval = 0; |
507 | ||
508 | camr = ac97c_readl(chip, CAMR); | |
509 | ||
510 | switch (cmd) { | |
511 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ | |
512 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ | |
513 | case SNDRV_PCM_TRIGGER_START: | |
7177395f SG |
514 | if (cpu_is_at32ap7000()) { |
515 | retval = dw_dma_cyclic_start(chip->dma.tx_chan); | |
516 | if (retval) | |
517 | goto out; | |
518 | } else { | |
519 | ptcr = ATMEL_PDC_TXTEN; | |
520 | } | |
ec2755a9 | 521 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX; |
4ede028f HCE |
522 | break; |
523 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ | |
524 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ | |
525 | case SNDRV_PCM_TRIGGER_STOP: | |
7177395f SG |
526 | if (cpu_is_at32ap7000()) |
527 | dw_dma_cyclic_stop(chip->dma.tx_chan); | |
528 | else | |
529 | ptcr |= ATMEL_PDC_TXTDIS; | |
4ede028f HCE |
530 | if (chip->opened <= 1) |
531 | camr &= ~AC97C_CMR_CENA; | |
532 | break; | |
533 | default: | |
534 | retval = -EINVAL; | |
535 | goto out; | |
536 | } | |
537 | ||
538 | ac97c_writel(chip, CAMR, camr); | |
7177395f SG |
539 | if (!cpu_is_at32ap7000()) |
540 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); | |
4ede028f HCE |
541 | out: |
542 | return retval; | |
543 | } | |
544 | ||
545 | static int | |
546 | atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd) | |
547 | { | |
548 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
7177395f | 549 | unsigned long camr, ptcr = 0; |
4ede028f HCE |
550 | int retval = 0; |
551 | ||
552 | camr = ac97c_readl(chip, CAMR); | |
7177395f | 553 | ptcr = readl(chip->regs + ATMEL_PDC_PTSR); |
4ede028f HCE |
554 | |
555 | switch (cmd) { | |
556 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ | |
557 | case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ | |
558 | case SNDRV_PCM_TRIGGER_START: | |
7177395f SG |
559 | if (cpu_is_at32ap7000()) { |
560 | retval = dw_dma_cyclic_start(chip->dma.rx_chan); | |
561 | if (retval) | |
562 | goto out; | |
563 | } else { | |
564 | ptcr = ATMEL_PDC_RXTEN; | |
565 | } | |
ec2755a9 | 566 | camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX; |
4ede028f HCE |
567 | break; |
568 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ | |
569 | case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ | |
570 | case SNDRV_PCM_TRIGGER_STOP: | |
7177395f SG |
571 | if (cpu_is_at32ap7000()) |
572 | dw_dma_cyclic_stop(chip->dma.rx_chan); | |
573 | else | |
574 | ptcr |= (ATMEL_PDC_RXTDIS); | |
4ede028f HCE |
575 | if (chip->opened <= 1) |
576 | camr &= ~AC97C_CMR_CENA; | |
577 | break; | |
578 | default: | |
579 | retval = -EINVAL; | |
580 | break; | |
581 | } | |
582 | ||
583 | ac97c_writel(chip, CAMR, camr); | |
7177395f SG |
584 | if (!cpu_is_at32ap7000()) |
585 | writel(ptcr, chip->regs + ATMEL_PDC_PTCR); | |
4ede028f HCE |
586 | out: |
587 | return retval; | |
588 | } | |
589 | ||
590 | static snd_pcm_uframes_t | |
591 | atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream) | |
592 | { | |
593 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
594 | struct snd_pcm_runtime *runtime = substream->runtime; | |
595 | snd_pcm_uframes_t frames; | |
596 | unsigned long bytes; | |
597 | ||
7177395f SG |
598 | if (cpu_is_at32ap7000()) |
599 | bytes = dw_dma_get_src_addr(chip->dma.tx_chan); | |
600 | else | |
601 | bytes = readl(chip->regs + ATMEL_PDC_TPR); | |
4ede028f HCE |
602 | bytes -= runtime->dma_addr; |
603 | ||
604 | frames = bytes_to_frames(runtime, bytes); | |
605 | if (frames >= runtime->buffer_size) | |
606 | frames -= runtime->buffer_size; | |
607 | return frames; | |
608 | } | |
609 | ||
610 | static snd_pcm_uframes_t | |
611 | atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream) | |
612 | { | |
613 | struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); | |
614 | struct snd_pcm_runtime *runtime = substream->runtime; | |
615 | snd_pcm_uframes_t frames; | |
616 | unsigned long bytes; | |
617 | ||
7177395f SG |
618 | if (cpu_is_at32ap7000()) |
619 | bytes = dw_dma_get_dst_addr(chip->dma.rx_chan); | |
620 | else | |
621 | bytes = readl(chip->regs + ATMEL_PDC_RPR); | |
4ede028f HCE |
622 | bytes -= runtime->dma_addr; |
623 | ||
624 | frames = bytes_to_frames(runtime, bytes); | |
625 | if (frames >= runtime->buffer_size) | |
626 | frames -= runtime->buffer_size; | |
627 | return frames; | |
628 | } | |
629 | ||
630 | static struct snd_pcm_ops atmel_ac97_playback_ops = { | |
631 | .open = atmel_ac97c_playback_open, | |
632 | .close = atmel_ac97c_playback_close, | |
633 | .ioctl = snd_pcm_lib_ioctl, | |
634 | .hw_params = atmel_ac97c_playback_hw_params, | |
635 | .hw_free = atmel_ac97c_playback_hw_free, | |
636 | .prepare = atmel_ac97c_playback_prepare, | |
637 | .trigger = atmel_ac97c_playback_trigger, | |
638 | .pointer = atmel_ac97c_playback_pointer, | |
639 | }; | |
640 | ||
641 | static struct snd_pcm_ops atmel_ac97_capture_ops = { | |
642 | .open = atmel_ac97c_capture_open, | |
643 | .close = atmel_ac97c_capture_close, | |
644 | .ioctl = snd_pcm_lib_ioctl, | |
645 | .hw_params = atmel_ac97c_capture_hw_params, | |
646 | .hw_free = atmel_ac97c_capture_hw_free, | |
647 | .prepare = atmel_ac97c_capture_prepare, | |
648 | .trigger = atmel_ac97c_capture_trigger, | |
649 | .pointer = atmel_ac97c_capture_pointer, | |
650 | }; | |
651 | ||
df163587 HCE |
652 | static irqreturn_t atmel_ac97c_interrupt(int irq, void *dev) |
653 | { | |
654 | struct atmel_ac97c *chip = (struct atmel_ac97c *)dev; | |
655 | irqreturn_t retval = IRQ_NONE; | |
656 | u32 sr = ac97c_readl(chip, SR); | |
657 | u32 casr = ac97c_readl(chip, CASR); | |
658 | u32 cosr = ac97c_readl(chip, COSR); | |
7177395f | 659 | u32 camr = ac97c_readl(chip, CAMR); |
df163587 HCE |
660 | |
661 | if (sr & AC97C_SR_CAEVT) { | |
7177395f SG |
662 | struct snd_pcm_runtime *runtime; |
663 | int offset, next_period, block_size; | |
f5341163 | 664 | dev_dbg(&chip->pdev->dev, "channel A event%s%s%s%s%s%s\n", |
df163587 HCE |
665 | casr & AC97C_CSR_OVRUN ? " OVRUN" : "", |
666 | casr & AC97C_CSR_RXRDY ? " RXRDY" : "", | |
667 | casr & AC97C_CSR_UNRUN ? " UNRUN" : "", | |
668 | casr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", | |
669 | casr & AC97C_CSR_TXRDY ? " TXRDY" : "", | |
670 | !casr ? " NONE" : ""); | |
7177395f SG |
671 | if (!cpu_is_at32ap7000()) { |
672 | if ((casr & camr) & AC97C_CSR_ENDTX) { | |
673 | runtime = chip->playback_substream->runtime; | |
674 | block_size = frames_to_bytes(runtime, | |
675 | runtime->period_size); | |
676 | chip->playback_period++; | |
677 | ||
678 | if (chip->playback_period == runtime->periods) | |
679 | chip->playback_period = 0; | |
680 | next_period = chip->playback_period + 1; | |
681 | if (next_period == runtime->periods) | |
682 | next_period = 0; | |
683 | ||
684 | offset = block_size * next_period; | |
685 | ||
686 | writel(runtime->dma_addr + offset, | |
687 | chip->regs + ATMEL_PDC_TNPR); | |
688 | writel(block_size / 2, | |
689 | chip->regs + ATMEL_PDC_TNCR); | |
690 | ||
691 | snd_pcm_period_elapsed( | |
692 | chip->playback_substream); | |
693 | } | |
694 | if ((casr & camr) & AC97C_CSR_ENDRX) { | |
695 | runtime = chip->capture_substream->runtime; | |
696 | block_size = frames_to_bytes(runtime, | |
697 | runtime->period_size); | |
698 | chip->capture_period++; | |
699 | ||
700 | if (chip->capture_period == runtime->periods) | |
701 | chip->capture_period = 0; | |
702 | next_period = chip->capture_period + 1; | |
703 | if (next_period == runtime->periods) | |
704 | next_period = 0; | |
705 | ||
706 | offset = block_size * next_period; | |
707 | ||
708 | writel(runtime->dma_addr + offset, | |
709 | chip->regs + ATMEL_PDC_RNPR); | |
710 | writel(block_size / 2, | |
711 | chip->regs + ATMEL_PDC_RNCR); | |
712 | snd_pcm_period_elapsed(chip->capture_substream); | |
713 | } | |
714 | } | |
df163587 HCE |
715 | retval = IRQ_HANDLED; |
716 | } | |
717 | ||
718 | if (sr & AC97C_SR_COEVT) { | |
719 | dev_info(&chip->pdev->dev, "codec channel event%s%s%s%s%s\n", | |
720 | cosr & AC97C_CSR_OVRUN ? " OVRUN" : "", | |
721 | cosr & AC97C_CSR_RXRDY ? " RXRDY" : "", | |
722 | cosr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", | |
723 | cosr & AC97C_CSR_TXRDY ? " TXRDY" : "", | |
724 | !cosr ? " NONE" : ""); | |
725 | retval = IRQ_HANDLED; | |
726 | } | |
727 | ||
728 | if (retval == IRQ_NONE) { | |
729 | dev_err(&chip->pdev->dev, "spurious interrupt sr 0x%08x " | |
730 | "casr 0x%08x cosr 0x%08x\n", sr, casr, cosr); | |
731 | } | |
732 | ||
733 | return retval; | |
734 | } | |
735 | ||
7177395f SG |
736 | static struct ac97_pcm at91_ac97_pcm_defs[] __devinitdata = { |
737 | /* Playback */ | |
738 | { | |
739 | .exclusive = 1, | |
740 | .r = { { | |
741 | .slots = ((1 << AC97_SLOT_PCM_LEFT) | |
742 | | (1 << AC97_SLOT_PCM_RIGHT)), | |
743 | } }, | |
744 | }, | |
745 | /* PCM in */ | |
746 | { | |
747 | .stream = 1, | |
748 | .exclusive = 1, | |
749 | .r = { { | |
750 | .slots = ((1 << AC97_SLOT_PCM_LEFT) | |
751 | | (1 << AC97_SLOT_PCM_RIGHT)), | |
752 | } } | |
753 | }, | |
754 | /* Mic in */ | |
755 | { | |
756 | .stream = 1, | |
757 | .exclusive = 1, | |
758 | .r = { { | |
759 | .slots = (1<<AC97_SLOT_MIC), | |
760 | } } | |
761 | }, | |
762 | }; | |
763 | ||
4ede028f HCE |
764 | static int __devinit atmel_ac97c_pcm_new(struct atmel_ac97c *chip) |
765 | { | |
766 | struct snd_pcm *pcm; | |
767 | struct snd_pcm_hardware hw = atmel_ac97c_hw; | |
7177395f | 768 | int capture, playback, retval, err; |
4ede028f HCE |
769 | |
770 | capture = test_bit(DMA_RX_CHAN_PRESENT, &chip->flags); | |
771 | playback = test_bit(DMA_TX_CHAN_PRESENT, &chip->flags); | |
772 | ||
7177395f SG |
773 | if (!cpu_is_at32ap7000()) { |
774 | err = snd_ac97_pcm_assign(chip->ac97_bus, | |
775 | ARRAY_SIZE(at91_ac97_pcm_defs), | |
776 | at91_ac97_pcm_defs); | |
777 | if (err) | |
778 | return err; | |
779 | } | |
4ede028f HCE |
780 | retval = snd_pcm_new(chip->card, chip->card->shortname, |
781 | chip->pdev->id, playback, capture, &pcm); | |
782 | if (retval) | |
783 | return retval; | |
784 | ||
785 | if (capture) | |
786 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, | |
787 | &atmel_ac97_capture_ops); | |
788 | if (playback) | |
789 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, | |
790 | &atmel_ac97_playback_ops); | |
791 | ||
792 | retval = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, | |
793 | &chip->pdev->dev, hw.periods_min * hw.period_bytes_min, | |
794 | hw.buffer_bytes_max); | |
795 | if (retval) | |
796 | return retval; | |
797 | ||
798 | pcm->private_data = chip; | |
799 | pcm->info_flags = 0; | |
800 | strcpy(pcm->name, chip->card->shortname); | |
801 | chip->pcm = pcm; | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
806 | static int atmel_ac97c_mixer_new(struct atmel_ac97c *chip) | |
807 | { | |
808 | struct snd_ac97_template template; | |
809 | memset(&template, 0, sizeof(template)); | |
810 | template.private_data = chip; | |
811 | return snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97); | |
812 | } | |
813 | ||
814 | static void atmel_ac97c_write(struct snd_ac97 *ac97, unsigned short reg, | |
815 | unsigned short val) | |
816 | { | |
817 | struct atmel_ac97c *chip = get_chip(ac97); | |
818 | unsigned long word; | |
819 | int timeout = 40; | |
820 | ||
821 | word = (reg & 0x7f) << 16 | val; | |
822 | ||
823 | do { | |
824 | if (ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) { | |
825 | ac97c_writel(chip, COTHR, word); | |
826 | return; | |
827 | } | |
828 | udelay(1); | |
829 | } while (--timeout); | |
830 | ||
831 | dev_dbg(&chip->pdev->dev, "codec write timeout\n"); | |
832 | } | |
833 | ||
834 | static unsigned short atmel_ac97c_read(struct snd_ac97 *ac97, | |
835 | unsigned short reg) | |
836 | { | |
837 | struct atmel_ac97c *chip = get_chip(ac97); | |
838 | unsigned long word; | |
839 | int timeout = 40; | |
840 | int write = 10; | |
841 | ||
842 | word = (0x80 | (reg & 0x7f)) << 16; | |
843 | ||
844 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) | |
845 | ac97c_readl(chip, CORHR); | |
846 | ||
847 | retry_write: | |
848 | timeout = 40; | |
849 | ||
850 | do { | |
851 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) != 0) { | |
852 | ac97c_writel(chip, COTHR, word); | |
853 | goto read_reg; | |
854 | } | |
855 | udelay(10); | |
856 | } while (--timeout); | |
857 | ||
858 | if (!--write) | |
859 | goto timed_out; | |
860 | goto retry_write; | |
861 | ||
862 | read_reg: | |
863 | do { | |
864 | if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) { | |
865 | unsigned short val = ac97c_readl(chip, CORHR); | |
866 | return val; | |
867 | } | |
868 | udelay(10); | |
869 | } while (--timeout); | |
870 | ||
871 | if (!--write) | |
872 | goto timed_out; | |
873 | goto retry_write; | |
874 | ||
875 | timed_out: | |
876 | dev_dbg(&chip->pdev->dev, "codec read timeout\n"); | |
877 | return 0xffff; | |
878 | } | |
879 | ||
880 | static bool filter(struct dma_chan *chan, void *slave) | |
881 | { | |
882 | struct dw_dma_slave *dws = slave; | |
883 | ||
884 | if (dws->dma_dev == chan->device->dev) { | |
885 | chan->private = dws; | |
886 | return true; | |
887 | } else | |
888 | return false; | |
889 | } | |
890 | ||
891 | static void atmel_ac97c_reset(struct atmel_ac97c *chip) | |
892 | { | |
81baf3a7 HCE |
893 | ac97c_writel(chip, MR, 0); |
894 | ac97c_writel(chip, MR, AC97C_MR_ENA); | |
895 | ac97c_writel(chip, CAMR, 0); | |
896 | ac97c_writel(chip, COMR, 0); | |
4ede028f HCE |
897 | |
898 | if (gpio_is_valid(chip->reset_pin)) { | |
899 | gpio_set_value(chip->reset_pin, 0); | |
900 | /* AC97 v2.2 specifications says minimum 1 us. */ | |
81baf3a7 | 901 | udelay(2); |
4ede028f | 902 | gpio_set_value(chip->reset_pin, 1); |
8015e3de BS |
903 | } else { |
904 | ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA); | |
905 | udelay(2); | |
906 | ac97c_writel(chip, MR, AC97C_MR_ENA); | |
4ede028f | 907 | } |
4ede028f HCE |
908 | } |
909 | ||
910 | static int __devinit atmel_ac97c_probe(struct platform_device *pdev) | |
911 | { | |
912 | struct snd_card *card; | |
913 | struct atmel_ac97c *chip; | |
914 | struct resource *regs; | |
915 | struct ac97c_platform_data *pdata; | |
916 | struct clk *pclk; | |
917 | static struct snd_ac97_bus_ops ops = { | |
918 | .write = atmel_ac97c_write, | |
919 | .read = atmel_ac97c_read, | |
920 | }; | |
921 | int retval; | |
df163587 | 922 | int irq; |
4ede028f HCE |
923 | |
924 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
925 | if (!regs) { | |
926 | dev_dbg(&pdev->dev, "no memory resource\n"); | |
927 | return -ENXIO; | |
928 | } | |
929 | ||
930 | pdata = pdev->dev.platform_data; | |
931 | if (!pdata) { | |
932 | dev_dbg(&pdev->dev, "no platform data\n"); | |
933 | return -ENXIO; | |
934 | } | |
935 | ||
df163587 HCE |
936 | irq = platform_get_irq(pdev, 0); |
937 | if (irq < 0) { | |
938 | dev_dbg(&pdev->dev, "could not get irq\n"); | |
939 | return -ENXIO; | |
940 | } | |
941 | ||
7177395f SG |
942 | if (cpu_is_at32ap7000()) { |
943 | pclk = clk_get(&pdev->dev, "pclk"); | |
944 | } else { | |
945 | pclk = clk_get(&pdev->dev, "ac97_clk"); | |
946 | } | |
947 | ||
4ede028f HCE |
948 | if (IS_ERR(pclk)) { |
949 | dev_dbg(&pdev->dev, "no peripheral clock\n"); | |
950 | return PTR_ERR(pclk); | |
951 | } | |
952 | clk_enable(pclk); | |
953 | ||
954 | retval = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, | |
955 | THIS_MODULE, sizeof(struct atmel_ac97c), &card); | |
956 | if (retval) { | |
957 | dev_dbg(&pdev->dev, "could not create sound card device\n"); | |
958 | goto err_snd_card_new; | |
959 | } | |
960 | ||
961 | chip = get_chip(card); | |
962 | ||
df163587 HCE |
963 | retval = request_irq(irq, atmel_ac97c_interrupt, 0, "AC97C", chip); |
964 | if (retval) { | |
965 | dev_dbg(&pdev->dev, "unable to request irq %d\n", irq); | |
966 | goto err_request_irq; | |
967 | } | |
968 | chip->irq = irq; | |
969 | ||
4ede028f HCE |
970 | spin_lock_init(&chip->lock); |
971 | ||
972 | strcpy(card->driver, "Atmel AC97C"); | |
973 | strcpy(card->shortname, "Atmel AC97C"); | |
974 | sprintf(card->longname, "Atmel AC97 controller"); | |
975 | ||
976 | chip->card = card; | |
977 | chip->pclk = pclk; | |
978 | chip->pdev = pdev; | |
28f65c11 | 979 | chip->regs = ioremap(regs->start, resource_size(regs)); |
4ede028f HCE |
980 | |
981 | if (!chip->regs) { | |
982 | dev_dbg(&pdev->dev, "could not remap register memory\n"); | |
983 | goto err_ioremap; | |
984 | } | |
985 | ||
986 | if (gpio_is_valid(pdata->reset_pin)) { | |
987 | if (gpio_request(pdata->reset_pin, "reset_pin")) { | |
988 | dev_dbg(&pdev->dev, "reset pin not available\n"); | |
989 | chip->reset_pin = -ENODEV; | |
990 | } else { | |
991 | gpio_direction_output(pdata->reset_pin, 1); | |
992 | chip->reset_pin = pdata->reset_pin; | |
993 | } | |
b2522f92 BS |
994 | } else { |
995 | chip->reset_pin = -EINVAL; | |
4ede028f HCE |
996 | } |
997 | ||
998 | snd_card_set_dev(card, &pdev->dev); | |
999 | ||
81baf3a7 HCE |
1000 | atmel_ac97c_reset(chip); |
1001 | ||
df163587 HCE |
1002 | /* Enable overrun interrupt from codec channel */ |
1003 | ac97c_writel(chip, COMR, AC97C_CSR_OVRUN); | |
1004 | ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT); | |
1005 | ||
4ede028f HCE |
1006 | retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus); |
1007 | if (retval) { | |
1008 | dev_dbg(&pdev->dev, "could not register on ac97 bus\n"); | |
1009 | goto err_ac97_bus; | |
1010 | } | |
1011 | ||
4ede028f HCE |
1012 | retval = atmel_ac97c_mixer_new(chip); |
1013 | if (retval) { | |
1014 | dev_dbg(&pdev->dev, "could not register ac97 mixer\n"); | |
1015 | goto err_ac97_bus; | |
1016 | } | |
1017 | ||
7177395f SG |
1018 | if (cpu_is_at32ap7000()) { |
1019 | if (pdata->rx_dws.dma_dev) { | |
7177395f | 1020 | dma_cap_mask_t mask; |
4ede028f | 1021 | |
7177395f SG |
1022 | dma_cap_zero(mask); |
1023 | dma_cap_set(DMA_SLAVE, mask); | |
4ede028f | 1024 | |
7177395f | 1025 | chip->dma.rx_chan = dma_request_channel(mask, filter, |
e2b35f3d VK |
1026 | &pdata->rx_dws); |
1027 | if (chip->dma.rx_chan) { | |
1028 | struct dma_slave_config dma_conf = { | |
1029 | .src_addr = regs->start + AC97C_CARHR + | |
1030 | 2, | |
1031 | .src_addr_width = | |
1032 | DMA_SLAVE_BUSWIDTH_2_BYTES, | |
1033 | .src_maxburst = 1, | |
1034 | .dst_maxburst = 1, | |
1035 | .direction = DMA_DEV_TO_MEM, | |
1036 | .device_fc = false, | |
1037 | }; | |
1038 | ||
1039 | dmaengine_slave_config(chip->dma.rx_chan, | |
1040 | &dma_conf); | |
1041 | } | |
4ede028f | 1042 | |
7177395f | 1043 | dev_info(&chip->pdev->dev, "using %s for DMA RX\n", |
23572856 | 1044 | dev_name(&chip->dma.rx_chan->dev->device)); |
7177395f SG |
1045 | set_bit(DMA_RX_CHAN_PRESENT, &chip->flags); |
1046 | } | |
4ede028f | 1047 | |
7177395f | 1048 | if (pdata->tx_dws.dma_dev) { |
7177395f | 1049 | dma_cap_mask_t mask; |
4ede028f | 1050 | |
7177395f SG |
1051 | dma_cap_zero(mask); |
1052 | dma_cap_set(DMA_SLAVE, mask); | |
4ede028f | 1053 | |
7177395f | 1054 | chip->dma.tx_chan = dma_request_channel(mask, filter, |
e2b35f3d VK |
1055 | &pdata->tx_dws); |
1056 | if (chip->dma.tx_chan) { | |
1057 | struct dma_slave_config dma_conf = { | |
1058 | .dst_addr = regs->start + AC97C_CATHR + | |
1059 | 2, | |
1060 | .dst_addr_width = | |
1061 | DMA_SLAVE_BUSWIDTH_2_BYTES, | |
1062 | .src_maxburst = 1, | |
1063 | .dst_maxburst = 1, | |
1064 | .direction = DMA_MEM_TO_DEV, | |
1065 | .device_fc = false, | |
1066 | }; | |
1067 | ||
1068 | dmaengine_slave_config(chip->dma.tx_chan, | |
1069 | &dma_conf); | |
1070 | } | |
4ede028f | 1071 | |
7177395f | 1072 | dev_info(&chip->pdev->dev, "using %s for DMA TX\n", |
23572856 | 1073 | dev_name(&chip->dma.tx_chan->dev->device)); |
7177395f SG |
1074 | set_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
1075 | } | |
4ede028f | 1076 | |
7177395f SG |
1077 | if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) && |
1078 | !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) { | |
1079 | dev_dbg(&pdev->dev, "DMA not available\n"); | |
1080 | retval = -ENODEV; | |
1081 | goto err_dma; | |
1082 | } | |
1083 | } else { | |
1084 | /* Just pretend that we have DMA channel(for at91 i is actually | |
1085 | * the PDC) */ | |
1086 | set_bit(DMA_RX_CHAN_PRESENT, &chip->flags); | |
1087 | set_bit(DMA_TX_CHAN_PRESENT, &chip->flags); | |
4ede028f HCE |
1088 | } |
1089 | ||
1090 | retval = atmel_ac97c_pcm_new(chip); | |
1091 | if (retval) { | |
1092 | dev_dbg(&pdev->dev, "could not register ac97 pcm device\n"); | |
1093 | goto err_dma; | |
1094 | } | |
1095 | ||
1096 | retval = snd_card_register(card); | |
1097 | if (retval) { | |
1098 | dev_dbg(&pdev->dev, "could not register sound card\n"); | |
df163587 | 1099 | goto err_dma; |
4ede028f HCE |
1100 | } |
1101 | ||
1102 | platform_set_drvdata(pdev, card); | |
1103 | ||
7177395f SG |
1104 | dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n", |
1105 | chip->regs, irq); | |
4ede028f HCE |
1106 | |
1107 | return 0; | |
1108 | ||
1109 | err_dma: | |
7177395f SG |
1110 | if (cpu_is_at32ap7000()) { |
1111 | if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags)) | |
1112 | dma_release_channel(chip->dma.rx_chan); | |
1113 | if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) | |
1114 | dma_release_channel(chip->dma.tx_chan); | |
1115 | clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags); | |
1116 | clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags); | |
1117 | chip->dma.rx_chan = NULL; | |
1118 | chip->dma.tx_chan = NULL; | |
1119 | } | |
4ede028f HCE |
1120 | err_ac97_bus: |
1121 | snd_card_set_dev(card, NULL); | |
1122 | ||
1123 | if (gpio_is_valid(chip->reset_pin)) | |
1124 | gpio_free(chip->reset_pin); | |
1125 | ||
1126 | iounmap(chip->regs); | |
1127 | err_ioremap: | |
df163587 HCE |
1128 | free_irq(irq, chip); |
1129 | err_request_irq: | |
4ede028f HCE |
1130 | snd_card_free(card); |
1131 | err_snd_card_new: | |
1132 | clk_disable(pclk); | |
1133 | clk_put(pclk); | |
1134 | return retval; | |
1135 | } | |
1136 | ||
1137 | #ifdef CONFIG_PM | |
284e7ca7 | 1138 | static int atmel_ac97c_suspend(struct device *pdev) |
4ede028f | 1139 | { |
284e7ca7 | 1140 | struct snd_card *card = dev_get_drvdata(pdev); |
4ede028f HCE |
1141 | struct atmel_ac97c *chip = card->private_data; |
1142 | ||
7177395f SG |
1143 | if (cpu_is_at32ap7000()) { |
1144 | if (test_bit(DMA_RX_READY, &chip->flags)) | |
1145 | dw_dma_cyclic_stop(chip->dma.rx_chan); | |
1146 | if (test_bit(DMA_TX_READY, &chip->flags)) | |
1147 | dw_dma_cyclic_stop(chip->dma.tx_chan); | |
1148 | } | |
4ede028f HCE |
1149 | clk_disable(chip->pclk); |
1150 | ||
1151 | return 0; | |
1152 | } | |
1153 | ||
284e7ca7 | 1154 | static int atmel_ac97c_resume(struct device *pdev) |
4ede028f | 1155 | { |
284e7ca7 | 1156 | struct snd_card *card = dev_get_drvdata(pdev); |
4ede028f HCE |
1157 | struct atmel_ac97c *chip = card->private_data; |
1158 | ||
1159 | clk_enable(chip->pclk); | |
7177395f SG |
1160 | if (cpu_is_at32ap7000()) { |
1161 | if (test_bit(DMA_RX_READY, &chip->flags)) | |
1162 | dw_dma_cyclic_start(chip->dma.rx_chan); | |
1163 | if (test_bit(DMA_TX_READY, &chip->flags)) | |
1164 | dw_dma_cyclic_start(chip->dma.tx_chan); | |
1165 | } | |
4ede028f HCE |
1166 | return 0; |
1167 | } | |
284e7ca7 TI |
1168 | |
1169 | static SIMPLE_DEV_PM_OPS(atmel_ac97c_pm, atmel_ac97c_suspend, atmel_ac97c_resume); | |
1170 | #define ATMEL_AC97C_PM_OPS &atmel_ac97c_pm | |
4ede028f | 1171 | #else |
284e7ca7 | 1172 | #define ATMEL_AC97C_PM_OPS NULL |
4ede028f HCE |
1173 | #endif |
1174 | ||
1175 | static int __devexit atmel_ac97c_remove(struct platform_device *pdev) | |
1176 | { | |
1177 | struct snd_card *card = platform_get_drvdata(pdev); | |
1178 | struct atmel_ac97c *chip = get_chip(card); | |
1179 | ||
1180 | if (gpio_is_valid(chip->reset_pin)) | |
1181 | gpio_free(chip->reset_pin); | |
1182 | ||
bd74a184 HCE |
1183 | ac97c_writel(chip, CAMR, 0); |
1184 | ac97c_writel(chip, COMR, 0); | |
1185 | ac97c_writel(chip, MR, 0); | |
1186 | ||
4ede028f HCE |
1187 | clk_disable(chip->pclk); |
1188 | clk_put(chip->pclk); | |
1189 | iounmap(chip->regs); | |
df163587 | 1190 | free_irq(chip->irq, chip); |
4ede028f | 1191 | |
7177395f SG |
1192 | if (cpu_is_at32ap7000()) { |
1193 | if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags)) | |
1194 | dma_release_channel(chip->dma.rx_chan); | |
1195 | if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) | |
1196 | dma_release_channel(chip->dma.tx_chan); | |
1197 | clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags); | |
1198 | clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags); | |
1199 | chip->dma.rx_chan = NULL; | |
1200 | chip->dma.tx_chan = NULL; | |
1201 | } | |
4ede028f HCE |
1202 | |
1203 | snd_card_set_dev(card, NULL); | |
1204 | snd_card_free(card); | |
1205 | ||
1206 | platform_set_drvdata(pdev, NULL); | |
1207 | ||
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | static struct platform_driver atmel_ac97c_driver = { | |
1212 | .remove = __devexit_p(atmel_ac97c_remove), | |
1213 | .driver = { | |
1214 | .name = "atmel_ac97c", | |
8bf01d8a | 1215 | .owner = THIS_MODULE, |
284e7ca7 | 1216 | .pm = ATMEL_AC97C_PM_OPS, |
4ede028f | 1217 | }, |
4ede028f HCE |
1218 | }; |
1219 | ||
1220 | static int __init atmel_ac97c_init(void) | |
1221 | { | |
1222 | return platform_driver_probe(&atmel_ac97c_driver, | |
1223 | atmel_ac97c_probe); | |
1224 | } | |
1225 | module_init(atmel_ac97c_init); | |
1226 | ||
1227 | static void __exit atmel_ac97c_exit(void) | |
1228 | { | |
1229 | platform_driver_unregister(&atmel_ac97c_driver); | |
1230 | } | |
1231 | module_exit(atmel_ac97c_exit); | |
1232 | ||
1233 | MODULE_LICENSE("GPL"); | |
1234 | MODULE_DESCRIPTION("Driver for Atmel AC97 controller"); | |
0cfae7c9 | 1235 | MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>"); |