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8380222e SH |
1 | /* |
2 | * imx-ssi.c -- ALSA Soc Audio Layer | |
3 | * | |
4 | * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de> | |
5 | * | |
6 | * This code is based on code copyrighted by Freescale, | |
7 | * Liam Girdwood, Javier Martin and probably others. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * | |
15 | * The i.MX SSI core has some nasty limitations in AC97 mode. While most | |
16 | * sane processor vendors have a FIFO per AC97 slot, the i.MX has only | |
17 | * one FIFO which combines all valid receive slots. We cannot even select | |
18 | * which slots we want to receive. The WM9712 with which this driver | |
19 | * was developped with always sends GPIO status data in slot 12 which | |
20 | * we receive in our (PCM-) data stream. The only chance we have is to | |
21 | * manually skip this data in the FIQ handler. With sampling rates different | |
22 | * from 48000Hz not every frame has valid receive data, so the ratio | |
23 | * between pcm data and GPIO status data changes. Our FIQ handler is not | |
24 | * able to handle this, hence this driver only works with 48000Hz sampling | |
25 | * rate. | |
25d1fbfd | 26 | * Reading and writing AC97 registers is another challenge. The core |
8380222e SH |
27 | * provides us status bits when the read register is updated with *another* |
28 | * value. When we read the same register two times (and the register still | |
29 | * contains the same value) these status bits are not set. We work | |
30 | * around this by not polling these bits but only wait a fixed delay. | |
31 | * | |
32 | */ | |
33 | ||
34 | #include <linux/clk.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/device.h> | |
37 | #include <linux/dma-mapping.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/interrupt.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/platform_device.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
8380222e SH |
43 | |
44 | #include <sound/core.h> | |
45 | #include <sound/initval.h> | |
46 | #include <sound/pcm.h> | |
47 | #include <sound/pcm_params.h> | |
48 | #include <sound/soc.h> | |
49 | ||
50 | #include <mach/ssi.h> | |
51 | #include <mach/hardware.h> | |
52 | ||
53 | #include "imx-ssi.h" | |
54 | ||
55 | #define SSI_SACNT_DEFAULT (SSI_SACNT_AC97EN | SSI_SACNT_FV) | |
56 | ||
57 | /* | |
58 | * SSI Network Mode or TDM slots configuration. | |
59 | * Should only be called when port is inactive (i.e. SSIEN = 0). | |
60 | */ | |
61 | static int imx_ssi_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, | |
62 | unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) | |
63 | { | |
48dbc419 | 64 | struct imx_ssi *ssi = cpu_dai->private_data; |
8380222e SH |
65 | u32 sccr; |
66 | ||
67 | sccr = readl(ssi->base + SSI_STCCR); | |
68 | sccr &= ~SSI_STCCR_DC_MASK; | |
69 | sccr |= SSI_STCCR_DC(slots - 1); | |
70 | writel(sccr, ssi->base + SSI_STCCR); | |
71 | ||
72 | sccr = readl(ssi->base + SSI_SRCCR); | |
73 | sccr &= ~SSI_STCCR_DC_MASK; | |
74 | sccr |= SSI_STCCR_DC(slots - 1); | |
75 | writel(sccr, ssi->base + SSI_SRCCR); | |
76 | ||
77 | writel(tx_mask, ssi->base + SSI_STMSK); | |
78 | writel(rx_mask, ssi->base + SSI_SRMSK); | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | /* | |
84 | * SSI DAI format configuration. | |
85 | * Should only be called when port is inactive (i.e. SSIEN = 0). | |
8380222e SH |
86 | */ |
87 | static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) | |
88 | { | |
48dbc419 | 89 | struct imx_ssi *ssi = cpu_dai->private_data; |
8380222e SH |
90 | u32 strcr = 0, scr; |
91 | ||
92 | scr = readl(ssi->base + SSI_SCR) & ~(SSI_SCR_SYN | SSI_SCR_NET); | |
93 | ||
94 | /* DAI mode */ | |
95 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
96 | case SND_SOC_DAIFMT_I2S: | |
97 | /* data on rising edge of bclk, frame low 1clk before data */ | |
98 | strcr |= SSI_STCR_TFSI | SSI_STCR_TEFS | SSI_STCR_TXBIT0; | |
99 | scr |= SSI_SCR_NET; | |
0e796120 EB |
100 | if (ssi->flags & IMX_SSI_USE_I2S_SLAVE) { |
101 | scr &= ~SSI_I2S_MODE_MASK; | |
102 | scr |= SSI_SCR_I2S_MODE_SLAVE; | |
103 | } | |
8380222e SH |
104 | break; |
105 | case SND_SOC_DAIFMT_LEFT_J: | |
106 | /* data on rising edge of bclk, frame high with data */ | |
107 | strcr |= SSI_STCR_TXBIT0; | |
108 | break; | |
109 | case SND_SOC_DAIFMT_DSP_B: | |
110 | /* data on rising edge of bclk, frame high with data */ | |
111 | strcr |= SSI_STCR_TFSL; | |
112 | break; | |
113 | case SND_SOC_DAIFMT_DSP_A: | |
114 | /* data on rising edge of bclk, frame high 1clk before data */ | |
115 | strcr |= SSI_STCR_TFSL | SSI_STCR_TEFS; | |
116 | break; | |
117 | } | |
118 | ||
119 | /* DAI clock inversion */ | |
120 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
121 | case SND_SOC_DAIFMT_IB_IF: | |
122 | strcr |= SSI_STCR_TFSI; | |
123 | strcr &= ~SSI_STCR_TSCKP; | |
124 | break; | |
125 | case SND_SOC_DAIFMT_IB_NF: | |
126 | strcr &= ~(SSI_STCR_TSCKP | SSI_STCR_TFSI); | |
127 | break; | |
128 | case SND_SOC_DAIFMT_NB_IF: | |
129 | strcr |= SSI_STCR_TFSI | SSI_STCR_TSCKP; | |
130 | break; | |
131 | case SND_SOC_DAIFMT_NB_NF: | |
132 | strcr &= ~SSI_STCR_TFSI; | |
133 | strcr |= SSI_STCR_TSCKP; | |
134 | break; | |
135 | } | |
136 | ||
137 | /* DAI clock master masks */ | |
138 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
d08a68bf | 139 | case SND_SOC_DAIFMT_CBM_CFM: |
8380222e | 140 | break; |
d08a68bf MB |
141 | default: |
142 | /* Master mode not implemented, needs handling of clocks. */ | |
143 | return -EINVAL; | |
8380222e SH |
144 | } |
145 | ||
146 | strcr |= SSI_STCR_TFEN0; | |
147 | ||
0e796120 EB |
148 | if (ssi->flags & IMX_SSI_NET) |
149 | scr |= SSI_SCR_NET; | |
150 | if (ssi->flags & IMX_SSI_SYN) | |
151 | scr |= SSI_SCR_SYN; | |
152 | ||
8380222e SH |
153 | writel(strcr, ssi->base + SSI_STCR); |
154 | writel(strcr, ssi->base + SSI_SRCR); | |
155 | writel(scr, ssi->base + SSI_SCR); | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | /* | |
161 | * SSI system clock configuration. | |
162 | * Should only be called when port is inactive (i.e. SSIEN = 0). | |
163 | */ | |
164 | static int imx_ssi_set_dai_sysclk(struct snd_soc_dai *cpu_dai, | |
165 | int clk_id, unsigned int freq, int dir) | |
166 | { | |
48dbc419 | 167 | struct imx_ssi *ssi = cpu_dai->private_data; |
8380222e SH |
168 | u32 scr; |
169 | ||
170 | scr = readl(ssi->base + SSI_SCR); | |
171 | ||
172 | switch (clk_id) { | |
173 | case IMX_SSP_SYS_CLK: | |
174 | if (dir == SND_SOC_CLOCK_OUT) | |
175 | scr |= SSI_SCR_SYS_CLK_EN; | |
176 | else | |
177 | scr &= ~SSI_SCR_SYS_CLK_EN; | |
178 | break; | |
179 | default: | |
180 | return -EINVAL; | |
181 | } | |
182 | ||
183 | writel(scr, ssi->base + SSI_SCR); | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | /* | |
189 | * SSI Clock dividers | |
190 | * Should only be called when port is inactive (i.e. SSIEN = 0). | |
191 | */ | |
192 | static int imx_ssi_set_dai_clkdiv(struct snd_soc_dai *cpu_dai, | |
193 | int div_id, int div) | |
194 | { | |
48dbc419 | 195 | struct imx_ssi *ssi = cpu_dai->private_data; |
8380222e SH |
196 | u32 stccr, srccr; |
197 | ||
198 | stccr = readl(ssi->base + SSI_STCCR); | |
199 | srccr = readl(ssi->base + SSI_SRCCR); | |
200 | ||
201 | switch (div_id) { | |
202 | case IMX_SSI_TX_DIV_2: | |
203 | stccr &= ~SSI_STCCR_DIV2; | |
204 | stccr |= div; | |
205 | break; | |
206 | case IMX_SSI_TX_DIV_PSR: | |
207 | stccr &= ~SSI_STCCR_PSR; | |
208 | stccr |= div; | |
209 | break; | |
210 | case IMX_SSI_TX_DIV_PM: | |
211 | stccr &= ~0xff; | |
212 | stccr |= SSI_STCCR_PM(div); | |
213 | break; | |
214 | case IMX_SSI_RX_DIV_2: | |
215 | stccr &= ~SSI_STCCR_DIV2; | |
216 | stccr |= div; | |
217 | break; | |
218 | case IMX_SSI_RX_DIV_PSR: | |
219 | stccr &= ~SSI_STCCR_PSR; | |
220 | stccr |= div; | |
221 | break; | |
222 | case IMX_SSI_RX_DIV_PM: | |
223 | stccr &= ~0xff; | |
224 | stccr |= SSI_STCCR_PM(div); | |
225 | break; | |
226 | default: | |
227 | return -EINVAL; | |
228 | } | |
229 | ||
230 | writel(stccr, ssi->base + SSI_STCCR); | |
231 | writel(srccr, ssi->base + SSI_SRCCR); | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
236 | /* | |
237 | * Should only be called when port is inactive (i.e. SSIEN = 0), | |
238 | * although can be called multiple times by upper layers. | |
239 | */ | |
240 | static int imx_ssi_hw_params(struct snd_pcm_substream *substream, | |
241 | struct snd_pcm_hw_params *params, | |
242 | struct snd_soc_dai *cpu_dai) | |
243 | { | |
48dbc419 | 244 | struct imx_ssi *ssi = cpu_dai->private_data; |
5f712b2b | 245 | struct imx_pcm_dma_params *dma_data; |
8380222e SH |
246 | u32 reg, sccr; |
247 | ||
248 | /* Tx/Rx config */ | |
249 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
250 | reg = SSI_STCCR; | |
5f712b2b | 251 | dma_data = &ssi->dma_params_tx; |
8380222e SH |
252 | } else { |
253 | reg = SSI_SRCCR; | |
5f712b2b | 254 | dma_data = &ssi->dma_params_rx; |
8380222e SH |
255 | } |
256 | ||
70bf043b SH |
257 | if (ssi->flags & IMX_SSI_SYN) |
258 | reg = SSI_STCCR; | |
259 | ||
5f712b2b DM |
260 | snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); |
261 | ||
8380222e SH |
262 | sccr = readl(ssi->base + reg) & ~SSI_STCCR_WL_MASK; |
263 | ||
264 | /* DAI data (word) size */ | |
265 | switch (params_format(params)) { | |
266 | case SNDRV_PCM_FORMAT_S16_LE: | |
267 | sccr |= SSI_SRCCR_WL(16); | |
268 | break; | |
269 | case SNDRV_PCM_FORMAT_S20_3LE: | |
270 | sccr |= SSI_SRCCR_WL(20); | |
271 | break; | |
272 | case SNDRV_PCM_FORMAT_S24_LE: | |
273 | sccr |= SSI_SRCCR_WL(24); | |
274 | break; | |
275 | } | |
276 | ||
277 | writel(sccr, ssi->base + reg); | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | static int imx_ssi_trigger(struct snd_pcm_substream *substream, int cmd, | |
283 | struct snd_soc_dai *dai) | |
284 | { | |
285 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
286 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
48dbc419 | 287 | struct imx_ssi *ssi = cpu_dai->private_data; |
8380222e SH |
288 | unsigned int sier_bits, sier; |
289 | unsigned int scr; | |
290 | ||
291 | scr = readl(ssi->base + SSI_SCR); | |
292 | sier = readl(ssi->base + SSI_SIER); | |
293 | ||
294 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
295 | if (ssi->flags & IMX_SSI_DMA) | |
296 | sier_bits = SSI_SIER_TDMAE; | |
297 | else | |
298 | sier_bits = SSI_SIER_TIE | SSI_SIER_TFE0_EN; | |
299 | } else { | |
300 | if (ssi->flags & IMX_SSI_DMA) | |
301 | sier_bits = SSI_SIER_RDMAE; | |
302 | else | |
303 | sier_bits = SSI_SIER_RIE | SSI_SIER_RFF0_EN; | |
304 | } | |
305 | ||
306 | switch (cmd) { | |
307 | case SNDRV_PCM_TRIGGER_START: | |
308 | case SNDRV_PCM_TRIGGER_RESUME: | |
309 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
310 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
311 | scr |= SSI_SCR_TE; | |
312 | else | |
313 | scr |= SSI_SCR_RE; | |
314 | sier |= sier_bits; | |
315 | ||
316 | if (++ssi->enabled == 1) | |
317 | scr |= SSI_SCR_SSIEN; | |
318 | ||
319 | break; | |
320 | ||
321 | case SNDRV_PCM_TRIGGER_STOP: | |
322 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
323 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
324 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
325 | scr &= ~SSI_SCR_TE; | |
326 | else | |
327 | scr &= ~SSI_SCR_RE; | |
328 | sier &= ~sier_bits; | |
329 | ||
330 | if (--ssi->enabled == 0) | |
331 | scr &= ~SSI_SCR_SSIEN; | |
332 | ||
333 | break; | |
334 | default: | |
335 | return -EINVAL; | |
336 | } | |
337 | ||
338 | if (!(ssi->flags & IMX_SSI_USE_AC97)) | |
339 | /* rx/tx are always enabled to access ac97 registers */ | |
340 | writel(scr, ssi->base + SSI_SCR); | |
341 | ||
342 | writel(sier, ssi->base + SSI_SIER); | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | static struct snd_soc_dai_ops imx_ssi_pcm_dai_ops = { | |
348 | .hw_params = imx_ssi_hw_params, | |
349 | .set_fmt = imx_ssi_set_dai_fmt, | |
350 | .set_clkdiv = imx_ssi_set_dai_clkdiv, | |
351 | .set_sysclk = imx_ssi_set_dai_sysclk, | |
352 | .set_tdm_slot = imx_ssi_set_dai_tdm_slot, | |
353 | .trigger = imx_ssi_trigger, | |
354 | }; | |
355 | ||
356 | static struct snd_soc_dai imx_ssi_dai = { | |
357 | .playback = { | |
358 | .channels_min = 2, | |
359 | .channels_max = 2, | |
360 | .rates = SNDRV_PCM_RATE_8000_96000, | |
361 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
362 | }, | |
363 | .capture = { | |
364 | .channels_min = 2, | |
365 | .channels_max = 2, | |
366 | .rates = SNDRV_PCM_RATE_8000_96000, | |
367 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
368 | }, | |
369 | .ops = &imx_ssi_pcm_dai_ops, | |
370 | }; | |
371 | ||
372 | int snd_imx_pcm_mmap(struct snd_pcm_substream *substream, | |
373 | struct vm_area_struct *vma) | |
374 | { | |
375 | struct snd_pcm_runtime *runtime = substream->runtime; | |
376 | int ret; | |
377 | ||
378 | ret = dma_mmap_coherent(NULL, vma, runtime->dma_area, | |
379 | runtime->dma_addr, runtime->dma_bytes); | |
380 | ||
381 | pr_debug("%s: ret: %d %p 0x%08x 0x%08x\n", __func__, ret, | |
382 | runtime->dma_area, | |
383 | runtime->dma_addr, | |
384 | runtime->dma_bytes); | |
385 | return ret; | |
386 | } | |
387 | ||
388 | static int imx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) | |
389 | { | |
390 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; | |
391 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
392 | size_t size = IMX_SSI_DMABUF_SIZE; | |
393 | ||
394 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
395 | buf->dev.dev = pcm->card->dev; | |
396 | buf->private_data = NULL; | |
397 | buf->area = dma_alloc_writecombine(pcm->card->dev, size, | |
398 | &buf->addr, GFP_KERNEL); | |
399 | if (!buf->area) | |
400 | return -ENOMEM; | |
401 | buf->bytes = size; | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | static u64 imx_pcm_dmamask = DMA_BIT_MASK(32); | |
407 | ||
408 | int imx_pcm_new(struct snd_card *card, struct snd_soc_dai *dai, | |
409 | struct snd_pcm *pcm) | |
410 | { | |
411 | ||
412 | int ret = 0; | |
413 | ||
414 | if (!card->dev->dma_mask) | |
415 | card->dev->dma_mask = &imx_pcm_dmamask; | |
416 | if (!card->dev->coherent_dma_mask) | |
417 | card->dev->coherent_dma_mask = DMA_BIT_MASK(32); | |
418 | if (dai->playback.channels_min) { | |
419 | ret = imx_pcm_preallocate_dma_buffer(pcm, | |
420 | SNDRV_PCM_STREAM_PLAYBACK); | |
421 | if (ret) | |
422 | goto out; | |
423 | } | |
424 | ||
425 | if (dai->capture.channels_min) { | |
426 | ret = imx_pcm_preallocate_dma_buffer(pcm, | |
427 | SNDRV_PCM_STREAM_CAPTURE); | |
428 | if (ret) | |
429 | goto out; | |
430 | } | |
431 | ||
432 | out: | |
433 | return ret; | |
434 | } | |
435 | ||
436 | void imx_pcm_free(struct snd_pcm *pcm) | |
437 | { | |
438 | struct snd_pcm_substream *substream; | |
439 | struct snd_dma_buffer *buf; | |
440 | int stream; | |
441 | ||
442 | for (stream = 0; stream < 2; stream++) { | |
443 | substream = pcm->streams[stream].substream; | |
444 | if (!substream) | |
445 | continue; | |
446 | ||
447 | buf = &substream->dma_buffer; | |
448 | if (!buf->area) | |
449 | continue; | |
450 | ||
451 | dma_free_writecombine(pcm->card->dev, buf->bytes, | |
452 | buf->area, buf->addr); | |
453 | buf->area = NULL; | |
454 | } | |
455 | } | |
456 | ||
457 | struct snd_soc_platform imx_soc_platform = { | |
458 | .name = "imx-audio", | |
459 | }; | |
460 | EXPORT_SYMBOL_GPL(imx_soc_platform); | |
461 | ||
462 | static struct snd_soc_dai imx_ac97_dai = { | |
463 | .name = "AC97", | |
464 | .ac97_control = 1, | |
465 | .playback = { | |
466 | .stream_name = "AC97 Playback", | |
467 | .channels_min = 2, | |
468 | .channels_max = 2, | |
469 | .rates = SNDRV_PCM_RATE_48000, | |
470 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
471 | }, | |
472 | .capture = { | |
473 | .stream_name = "AC97 Capture", | |
474 | .channels_min = 2, | |
475 | .channels_max = 2, | |
476 | .rates = SNDRV_PCM_RATE_48000, | |
477 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
478 | }, | |
479 | .ops = &imx_ssi_pcm_dai_ops, | |
480 | }; | |
481 | ||
482 | static void setup_channel_to_ac97(struct imx_ssi *imx_ssi) | |
483 | { | |
484 | void __iomem *base = imx_ssi->base; | |
485 | ||
486 | writel(0x0, base + SSI_SCR); | |
487 | writel(0x0, base + SSI_STCR); | |
488 | writel(0x0, base + SSI_SRCR); | |
489 | ||
490 | writel(SSI_SCR_SYN | SSI_SCR_NET, base + SSI_SCR); | |
491 | ||
492 | writel(SSI_SFCSR_RFWM0(8) | | |
493 | SSI_SFCSR_TFWM0(8) | | |
494 | SSI_SFCSR_RFWM1(8) | | |
495 | SSI_SFCSR_TFWM1(8), base + SSI_SFCSR); | |
496 | ||
497 | writel(SSI_STCCR_WL(16) | SSI_STCCR_DC(12), base + SSI_STCCR); | |
498 | writel(SSI_STCCR_WL(16) | SSI_STCCR_DC(12), base + SSI_SRCCR); | |
499 | ||
500 | writel(SSI_SCR_SYN | SSI_SCR_NET | SSI_SCR_SSIEN, base + SSI_SCR); | |
501 | writel(SSI_SOR_WAIT(3), base + SSI_SOR); | |
502 | ||
503 | writel(SSI_SCR_SYN | SSI_SCR_NET | SSI_SCR_SSIEN | | |
504 | SSI_SCR_TE | SSI_SCR_RE, | |
505 | base + SSI_SCR); | |
506 | ||
507 | writel(SSI_SACNT_DEFAULT, base + SSI_SACNT); | |
508 | writel(0xff, base + SSI_SACCDIS); | |
509 | writel(0x300, base + SSI_SACCEN); | |
510 | } | |
511 | ||
512 | static struct imx_ssi *ac97_ssi; | |
513 | ||
514 | static void imx_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg, | |
515 | unsigned short val) | |
516 | { | |
517 | struct imx_ssi *imx_ssi = ac97_ssi; | |
518 | void __iomem *base = imx_ssi->base; | |
519 | unsigned int lreg; | |
520 | unsigned int lval; | |
521 | ||
522 | if (reg > 0x7f) | |
523 | return; | |
524 | ||
525 | pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val); | |
526 | ||
527 | lreg = reg << 12; | |
528 | writel(lreg, base + SSI_SACADD); | |
529 | ||
530 | lval = val << 4; | |
531 | writel(lval , base + SSI_SACDAT); | |
532 | ||
533 | writel(SSI_SACNT_DEFAULT | SSI_SACNT_WR, base + SSI_SACNT); | |
534 | udelay(100); | |
535 | } | |
536 | ||
537 | static unsigned short imx_ssi_ac97_read(struct snd_ac97 *ac97, | |
538 | unsigned short reg) | |
539 | { | |
540 | struct imx_ssi *imx_ssi = ac97_ssi; | |
541 | void __iomem *base = imx_ssi->base; | |
542 | ||
543 | unsigned short val = -1; | |
544 | unsigned int lreg; | |
545 | ||
546 | lreg = (reg & 0x7f) << 12 ; | |
547 | writel(lreg, base + SSI_SACADD); | |
548 | writel(SSI_SACNT_DEFAULT | SSI_SACNT_RD, base + SSI_SACNT); | |
549 | ||
550 | udelay(100); | |
551 | ||
552 | val = (readl(base + SSI_SACDAT) >> 4) & 0xffff; | |
553 | ||
554 | pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val); | |
555 | ||
556 | return val; | |
557 | } | |
558 | ||
559 | static void imx_ssi_ac97_reset(struct snd_ac97 *ac97) | |
560 | { | |
561 | struct imx_ssi *imx_ssi = ac97_ssi; | |
562 | ||
563 | if (imx_ssi->ac97_reset) | |
564 | imx_ssi->ac97_reset(ac97); | |
565 | } | |
566 | ||
567 | static void imx_ssi_ac97_warm_reset(struct snd_ac97 *ac97) | |
568 | { | |
569 | struct imx_ssi *imx_ssi = ac97_ssi; | |
570 | ||
571 | if (imx_ssi->ac97_warm_reset) | |
572 | imx_ssi->ac97_warm_reset(ac97); | |
573 | } | |
574 | ||
575 | struct snd_ac97_bus_ops soc_ac97_ops = { | |
576 | .read = imx_ssi_ac97_read, | |
577 | .write = imx_ssi_ac97_write, | |
578 | .reset = imx_ssi_ac97_reset, | |
579 | .warm_reset = imx_ssi_ac97_warm_reset | |
580 | }; | |
581 | EXPORT_SYMBOL_GPL(soc_ac97_ops); | |
582 | ||
48dbc419 | 583 | struct snd_soc_dai imx_ssi_pcm_dai[2]; |
8380222e SH |
584 | EXPORT_SYMBOL_GPL(imx_ssi_pcm_dai); |
585 | ||
586 | static int imx_ssi_probe(struct platform_device *pdev) | |
587 | { | |
588 | struct resource *res; | |
589 | struct imx_ssi *ssi; | |
590 | struct imx_ssi_platform_data *pdata = pdev->dev.platform_data; | |
591 | struct snd_soc_platform *platform; | |
592 | int ret = 0; | |
593 | unsigned int val; | |
48dbc419 MB |
594 | struct snd_soc_dai *dai = &imx_ssi_pcm_dai[pdev->id]; |
595 | ||
596 | if (dai->id >= ARRAY_SIZE(imx_ssi_pcm_dai)) | |
597 | return -EINVAL; | |
8380222e SH |
598 | |
599 | ssi = kzalloc(sizeof(*ssi), GFP_KERNEL); | |
600 | if (!ssi) | |
601 | return -ENOMEM; | |
602 | ||
603 | if (pdata) { | |
604 | ssi->ac97_reset = pdata->ac97_reset; | |
605 | ssi->ac97_warm_reset = pdata->ac97_warm_reset; | |
606 | ssi->flags = pdata->flags; | |
607 | } | |
608 | ||
8380222e SH |
609 | ssi->irq = platform_get_irq(pdev, 0); |
610 | ||
611 | ssi->clk = clk_get(&pdev->dev, NULL); | |
612 | if (IS_ERR(ssi->clk)) { | |
613 | ret = PTR_ERR(ssi->clk); | |
614 | dev_err(&pdev->dev, "Cannot get the clock: %d\n", | |
615 | ret); | |
616 | goto failed_clk; | |
617 | } | |
618 | clk_enable(ssi->clk); | |
619 | ||
620 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
621 | if (!res) { | |
622 | ret = -ENODEV; | |
623 | goto failed_get_resource; | |
624 | } | |
625 | ||
626 | if (!request_mem_region(res->start, resource_size(res), DRV_NAME)) { | |
627 | dev_err(&pdev->dev, "request_mem_region failed\n"); | |
628 | ret = -EBUSY; | |
629 | goto failed_get_resource; | |
630 | } | |
631 | ||
632 | ssi->base = ioremap(res->start, resource_size(res)); | |
633 | if (!ssi->base) { | |
634 | dev_err(&pdev->dev, "ioremap failed\n"); | |
635 | ret = -ENODEV; | |
636 | goto failed_ioremap; | |
637 | } | |
638 | ||
639 | if (ssi->flags & IMX_SSI_USE_AC97) { | |
640 | if (ac97_ssi) { | |
641 | ret = -EBUSY; | |
642 | goto failed_ac97; | |
643 | } | |
644 | ac97_ssi = ssi; | |
645 | setup_channel_to_ac97(ssi); | |
48dbc419 | 646 | memcpy(dai, &imx_ac97_dai, sizeof(imx_ac97_dai)); |
8380222e | 647 | } else |
48dbc419 | 648 | memcpy(dai, &imx_ssi_dai, sizeof(imx_ssi_dai)); |
8380222e SH |
649 | |
650 | writel(0x0, ssi->base + SSI_SIER); | |
651 | ||
652 | ssi->dma_params_rx.dma_addr = res->start + SSI_SRX0; | |
653 | ssi->dma_params_tx.dma_addr = res->start + SSI_STX0; | |
654 | ||
655 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx0"); | |
656 | if (res) | |
657 | ssi->dma_params_tx.dma = res->start; | |
658 | ||
659 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx0"); | |
660 | if (res) | |
661 | ssi->dma_params_rx.dma = res->start; | |
662 | ||
48dbc419 MB |
663 | dai->id = pdev->id; |
664 | dai->dev = &pdev->dev; | |
665 | dai->name = kasprintf(GFP_KERNEL, "imx-ssi.%d", pdev->id); | |
666 | dai->private_data = ssi; | |
8380222e SH |
667 | |
668 | if ((cpu_is_mx27() || cpu_is_mx21()) && | |
206b60e1 SH |
669 | !(ssi->flags & IMX_SSI_USE_AC97) && |
670 | (ssi->flags & IMX_SSI_DMA)) { | |
8380222e SH |
671 | ssi->flags |= IMX_SSI_DMA; |
672 | platform = imx_ssi_dma_mx2_init(pdev, ssi); | |
673 | } else | |
674 | platform = imx_ssi_fiq_init(pdev, ssi); | |
675 | ||
676 | imx_soc_platform.pcm_ops = platform->pcm_ops; | |
677 | imx_soc_platform.pcm_new = platform->pcm_new; | |
678 | imx_soc_platform.pcm_free = platform->pcm_free; | |
679 | ||
680 | val = SSI_SFCSR_TFWM0(ssi->dma_params_tx.burstsize) | | |
681 | SSI_SFCSR_RFWM0(ssi->dma_params_rx.burstsize); | |
682 | writel(val, ssi->base + SSI_SFCSR); | |
683 | ||
48dbc419 | 684 | ret = snd_soc_register_dai(dai); |
8380222e SH |
685 | if (ret) { |
686 | dev_err(&pdev->dev, "register DAI failed\n"); | |
687 | goto failed_register; | |
688 | } | |
689 | ||
690 | platform_set_drvdata(pdev, ssi); | |
691 | ||
692 | return 0; | |
693 | ||
694 | failed_register: | |
695 | failed_ac97: | |
696 | iounmap(ssi->base); | |
697 | failed_ioremap: | |
698 | release_mem_region(res->start, resource_size(res)); | |
699 | failed_get_resource: | |
700 | clk_disable(ssi->clk); | |
701 | clk_put(ssi->clk); | |
702 | failed_clk: | |
703 | kfree(ssi); | |
704 | ||
705 | return ret; | |
706 | } | |
707 | ||
708 | static int __devexit imx_ssi_remove(struct platform_device *pdev) | |
709 | { | |
710 | struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
711 | struct imx_ssi *ssi = platform_get_drvdata(pdev); | |
48dbc419 | 712 | struct snd_soc_dai *dai = &imx_ssi_pcm_dai[pdev->id]; |
8380222e | 713 | |
48dbc419 | 714 | snd_soc_unregister_dai(dai); |
8380222e SH |
715 | |
716 | if (ssi->flags & IMX_SSI_USE_AC97) | |
717 | ac97_ssi = NULL; | |
718 | ||
719 | if (!(ssi->flags & IMX_SSI_DMA)) | |
720 | imx_ssi_fiq_exit(pdev, ssi); | |
721 | ||
722 | iounmap(ssi->base); | |
723 | release_mem_region(res->start, resource_size(res)); | |
724 | clk_disable(ssi->clk); | |
725 | clk_put(ssi->clk); | |
726 | kfree(ssi); | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
731 | static struct platform_driver imx_ssi_driver = { | |
732 | .probe = imx_ssi_probe, | |
733 | .remove = __devexit_p(imx_ssi_remove), | |
734 | ||
735 | .driver = { | |
736 | .name = DRV_NAME, | |
737 | .owner = THIS_MODULE, | |
738 | }, | |
739 | }; | |
740 | ||
741 | static int __init imx_ssi_init(void) | |
742 | { | |
743 | int ret; | |
744 | ||
745 | ret = snd_soc_register_platform(&imx_soc_platform); | |
746 | if (ret) { | |
747 | pr_err("failed to register soc platform: %d\n", ret); | |
748 | return ret; | |
749 | } | |
750 | ||
751 | ret = platform_driver_register(&imx_ssi_driver); | |
752 | if (ret) { | |
753 | snd_soc_unregister_platform(&imx_soc_platform); | |
754 | return ret; | |
755 | } | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | static void __exit imx_ssi_exit(void) | |
761 | { | |
762 | platform_driver_unregister(&imx_ssi_driver); | |
763 | snd_soc_unregister_platform(&imx_soc_platform); | |
764 | } | |
765 | ||
766 | module_init(imx_ssi_init); | |
767 | module_exit(imx_ssi_exit); | |
768 | ||
769 | /* Module information */ | |
770 | MODULE_AUTHOR("Sascha Hauer, <s.hauer@pengutronix.de>"); | |
771 | MODULE_DESCRIPTION("i.MX I2S/ac97 SoC Interface"); | |
772 | MODULE_LICENSE("GPL"); | |
773 |