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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 | |
25985edc | 19 | * was developed with always sends GPIO status data in slot 12 which |
8380222e SH |
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. | |
a23dc694 | 31 | * |
8380222e SH |
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 | ||
82906b13 | 50 | #include <linux/platform_data/asoc-imx-ssi.h> |
8380222e SH |
51 | |
52 | #include "imx-ssi.h" | |
5f9e6ff6 | 53 | #include "fsl_utils.h" |
8380222e SH |
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 | { | |
f0fba2ad | 64 | struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai); |
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 | { | |
f0fba2ad | 89 | struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai); |
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 */ | |
0a93421b | 111 | strcr |= SSI_STCR_TFSL | SSI_STCR_TXBIT0; |
8380222e SH |
112 | break; |
113 | case SND_SOC_DAIFMT_DSP_A: | |
114 | /* data on rising edge of bclk, frame high 1clk before data */ | |
5ed80a75 | 115 | strcr |= SSI_STCR_TFSL | SSI_STCR_TXBIT0 | SSI_STCR_TEFS; |
8380222e SH |
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 | { | |
f0fba2ad | 167 | struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai); |
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 | { | |
f0fba2ad | 195 | struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai); |
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 | { | |
f0fba2ad | 244 | struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai); |
8380222e SH |
245 | u32 reg, sccr; |
246 | ||
247 | /* Tx/Rx config */ | |
91a38540 | 248 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
8380222e | 249 | reg = SSI_STCCR; |
91a38540 | 250 | else |
8380222e | 251 | reg = SSI_SRCCR; |
8380222e | 252 | |
70bf043b SH |
253 | if (ssi->flags & IMX_SSI_SYN) |
254 | reg = SSI_STCCR; | |
255 | ||
8380222e SH |
256 | sccr = readl(ssi->base + reg) & ~SSI_STCCR_WL_MASK; |
257 | ||
258 | /* DAI data (word) size */ | |
259 | switch (params_format(params)) { | |
260 | case SNDRV_PCM_FORMAT_S16_LE: | |
261 | sccr |= SSI_SRCCR_WL(16); | |
262 | break; | |
263 | case SNDRV_PCM_FORMAT_S20_3LE: | |
264 | sccr |= SSI_SRCCR_WL(20); | |
265 | break; | |
266 | case SNDRV_PCM_FORMAT_S24_LE: | |
267 | sccr |= SSI_SRCCR_WL(24); | |
268 | break; | |
269 | } | |
270 | ||
271 | writel(sccr, ssi->base + reg); | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | static int imx_ssi_trigger(struct snd_pcm_substream *substream, int cmd, | |
277 | struct snd_soc_dai *dai) | |
278 | { | |
f0fba2ad | 279 | struct imx_ssi *ssi = snd_soc_dai_get_drvdata(dai); |
8380222e SH |
280 | unsigned int sier_bits, sier; |
281 | unsigned int scr; | |
282 | ||
283 | scr = readl(ssi->base + SSI_SCR); | |
284 | sier = readl(ssi->base + SSI_SIER); | |
285 | ||
286 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
287 | if (ssi->flags & IMX_SSI_DMA) | |
288 | sier_bits = SSI_SIER_TDMAE; | |
289 | else | |
290 | sier_bits = SSI_SIER_TIE | SSI_SIER_TFE0_EN; | |
291 | } else { | |
292 | if (ssi->flags & IMX_SSI_DMA) | |
293 | sier_bits = SSI_SIER_RDMAE; | |
294 | else | |
295 | sier_bits = SSI_SIER_RIE | SSI_SIER_RFF0_EN; | |
296 | } | |
297 | ||
298 | switch (cmd) { | |
299 | case SNDRV_PCM_TRIGGER_START: | |
300 | case SNDRV_PCM_TRIGGER_RESUME: | |
301 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
302 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
303 | scr |= SSI_SCR_TE; | |
304 | else | |
305 | scr |= SSI_SCR_RE; | |
306 | sier |= sier_bits; | |
307 | ||
3621dbbc | 308 | scr |= SSI_SCR_SSIEN; |
8380222e SH |
309 | |
310 | break; | |
311 | ||
312 | case SNDRV_PCM_TRIGGER_STOP: | |
313 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
314 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
315 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
316 | scr &= ~SSI_SCR_TE; | |
317 | else | |
318 | scr &= ~SSI_SCR_RE; | |
319 | sier &= ~sier_bits; | |
320 | ||
3621dbbc | 321 | if (!(scr & (SSI_SCR_TE | SSI_SCR_RE))) |
8380222e SH |
322 | scr &= ~SSI_SCR_SSIEN; |
323 | ||
324 | break; | |
325 | default: | |
326 | return -EINVAL; | |
327 | } | |
328 | ||
329 | if (!(ssi->flags & IMX_SSI_USE_AC97)) | |
330 | /* rx/tx are always enabled to access ac97 registers */ | |
331 | writel(scr, ssi->base + SSI_SCR); | |
332 | ||
333 | writel(sier, ssi->base + SSI_SIER); | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
85e7652d | 338 | static const struct snd_soc_dai_ops imx_ssi_pcm_dai_ops = { |
8380222e SH |
339 | .hw_params = imx_ssi_hw_params, |
340 | .set_fmt = imx_ssi_set_dai_fmt, | |
341 | .set_clkdiv = imx_ssi_set_dai_clkdiv, | |
342 | .set_sysclk = imx_ssi_set_dai_sysclk, | |
5f9e6ff6 | 343 | .xlate_tdm_slot_mask = fsl_asoc_xlate_tdm_slot_mask, |
8380222e SH |
344 | .set_tdm_slot = imx_ssi_set_dai_tdm_slot, |
345 | .trigger = imx_ssi_trigger, | |
346 | }; | |
347 | ||
f562be51 SH |
348 | static int imx_ssi_dai_probe(struct snd_soc_dai *dai) |
349 | { | |
350 | struct imx_ssi *ssi = dev_get_drvdata(dai->dev); | |
351 | uint32_t val; | |
352 | ||
353 | snd_soc_dai_set_drvdata(dai, ssi); | |
354 | ||
a8909c9b LPC |
355 | val = SSI_SFCSR_TFWM0(ssi->dma_params_tx.maxburst) | |
356 | SSI_SFCSR_RFWM0(ssi->dma_params_rx.maxburst); | |
f562be51 SH |
357 | writel(val, ssi->base + SSI_SFCSR); |
358 | ||
fc8ba7f9 LPC |
359 | /* Tx/Rx config */ |
360 | dai->playback_dma_data = &ssi->dma_params_tx; | |
361 | dai->capture_dma_data = &ssi->dma_params_rx; | |
362 | ||
f562be51 SH |
363 | return 0; |
364 | } | |
365 | ||
f0fba2ad | 366 | static struct snd_soc_dai_driver imx_ssi_dai = { |
f562be51 | 367 | .probe = imx_ssi_dai_probe, |
f0fba2ad | 368 | .playback = { |
104c2299 | 369 | .channels_min = 1, |
f0fba2ad LG |
370 | .channels_max = 2, |
371 | .rates = SNDRV_PCM_RATE_8000_96000, | |
372 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
373 | }, | |
374 | .capture = { | |
104c2299 | 375 | .channels_min = 1, |
f0fba2ad LG |
376 | .channels_max = 2, |
377 | .rates = SNDRV_PCM_RATE_8000_96000, | |
378 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
379 | }, | |
380 | .ops = &imx_ssi_pcm_dai_ops, | |
8380222e | 381 | }; |
8380222e | 382 | |
f0fba2ad LG |
383 | static struct snd_soc_dai_driver imx_ac97_dai = { |
384 | .probe = imx_ssi_dai_probe, | |
bc263214 | 385 | .bus_control = true, |
8380222e SH |
386 | .playback = { |
387 | .stream_name = "AC97 Playback", | |
388 | .channels_min = 2, | |
389 | .channels_max = 2, | |
c1963c37 | 390 | .rates = SNDRV_PCM_RATE_8000_48000, |
8380222e SH |
391 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
392 | }, | |
393 | .capture = { | |
394 | .stream_name = "AC97 Capture", | |
395 | .channels_min = 2, | |
396 | .channels_max = 2, | |
397 | .rates = SNDRV_PCM_RATE_48000, | |
398 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
399 | }, | |
400 | .ops = &imx_ssi_pcm_dai_ops, | |
401 | }; | |
402 | ||
c22fd5ef KM |
403 | static const struct snd_soc_component_driver imx_component = { |
404 | .name = DRV_NAME, | |
405 | }; | |
406 | ||
8380222e SH |
407 | static void setup_channel_to_ac97(struct imx_ssi *imx_ssi) |
408 | { | |
409 | void __iomem *base = imx_ssi->base; | |
410 | ||
411 | writel(0x0, base + SSI_SCR); | |
412 | writel(0x0, base + SSI_STCR); | |
413 | writel(0x0, base + SSI_SRCR); | |
414 | ||
415 | writel(SSI_SCR_SYN | SSI_SCR_NET, base + SSI_SCR); | |
416 | ||
417 | writel(SSI_SFCSR_RFWM0(8) | | |
418 | SSI_SFCSR_TFWM0(8) | | |
419 | SSI_SFCSR_RFWM1(8) | | |
420 | SSI_SFCSR_TFWM1(8), base + SSI_SFCSR); | |
421 | ||
422 | writel(SSI_STCCR_WL(16) | SSI_STCCR_DC(12), base + SSI_STCCR); | |
423 | writel(SSI_STCCR_WL(16) | SSI_STCCR_DC(12), base + SSI_SRCCR); | |
424 | ||
425 | writel(SSI_SCR_SYN | SSI_SCR_NET | SSI_SCR_SSIEN, base + SSI_SCR); | |
426 | writel(SSI_SOR_WAIT(3), base + SSI_SOR); | |
427 | ||
428 | writel(SSI_SCR_SYN | SSI_SCR_NET | SSI_SCR_SSIEN | | |
429 | SSI_SCR_TE | SSI_SCR_RE, | |
430 | base + SSI_SCR); | |
431 | ||
432 | writel(SSI_SACNT_DEFAULT, base + SSI_SACNT); | |
433 | writel(0xff, base + SSI_SACCDIS); | |
434 | writel(0x300, base + SSI_SACCEN); | |
435 | } | |
436 | ||
437 | static struct imx_ssi *ac97_ssi; | |
438 | ||
439 | static void imx_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg, | |
440 | unsigned short val) | |
441 | { | |
442 | struct imx_ssi *imx_ssi = ac97_ssi; | |
443 | void __iomem *base = imx_ssi->base; | |
444 | unsigned int lreg; | |
445 | unsigned int lval; | |
446 | ||
447 | if (reg > 0x7f) | |
448 | return; | |
449 | ||
450 | pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val); | |
451 | ||
452 | lreg = reg << 12; | |
453 | writel(lreg, base + SSI_SACADD); | |
454 | ||
455 | lval = val << 4; | |
456 | writel(lval , base + SSI_SACDAT); | |
457 | ||
458 | writel(SSI_SACNT_DEFAULT | SSI_SACNT_WR, base + SSI_SACNT); | |
459 | udelay(100); | |
460 | } | |
461 | ||
462 | static unsigned short imx_ssi_ac97_read(struct snd_ac97 *ac97, | |
463 | unsigned short reg) | |
464 | { | |
465 | struct imx_ssi *imx_ssi = ac97_ssi; | |
466 | void __iomem *base = imx_ssi->base; | |
467 | ||
468 | unsigned short val = -1; | |
469 | unsigned int lreg; | |
470 | ||
471 | lreg = (reg & 0x7f) << 12 ; | |
472 | writel(lreg, base + SSI_SACADD); | |
473 | writel(SSI_SACNT_DEFAULT | SSI_SACNT_RD, base + SSI_SACNT); | |
474 | ||
475 | udelay(100); | |
476 | ||
477 | val = (readl(base + SSI_SACDAT) >> 4) & 0xffff; | |
478 | ||
479 | pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val); | |
480 | ||
481 | return val; | |
482 | } | |
483 | ||
484 | static void imx_ssi_ac97_reset(struct snd_ac97 *ac97) | |
485 | { | |
486 | struct imx_ssi *imx_ssi = ac97_ssi; | |
487 | ||
488 | if (imx_ssi->ac97_reset) | |
489 | imx_ssi->ac97_reset(ac97); | |
b6e51600 SH |
490 | /* First read sometimes fails, do a dummy read */ |
491 | imx_ssi_ac97_read(ac97, 0); | |
8380222e SH |
492 | } |
493 | ||
494 | static void imx_ssi_ac97_warm_reset(struct snd_ac97 *ac97) | |
495 | { | |
496 | struct imx_ssi *imx_ssi = ac97_ssi; | |
497 | ||
498 | if (imx_ssi->ac97_warm_reset) | |
499 | imx_ssi->ac97_warm_reset(ac97); | |
b6e51600 SH |
500 | |
501 | /* First read sometimes fails, do a dummy read */ | |
502 | imx_ssi_ac97_read(ac97, 0); | |
8380222e SH |
503 | } |
504 | ||
b047e1cc | 505 | static struct snd_ac97_bus_ops imx_ssi_ac97_ops = { |
8380222e SH |
506 | .read = imx_ssi_ac97_read, |
507 | .write = imx_ssi_ac97_write, | |
508 | .reset = imx_ssi_ac97_reset, | |
509 | .warm_reset = imx_ssi_ac97_warm_reset | |
510 | }; | |
8380222e | 511 | |
8380222e SH |
512 | static int imx_ssi_probe(struct platform_device *pdev) |
513 | { | |
514 | struct resource *res; | |
515 | struct imx_ssi *ssi; | |
516 | struct imx_ssi_platform_data *pdata = pdev->dev.platform_data; | |
8380222e | 517 | int ret = 0; |
f0fba2ad | 518 | struct snd_soc_dai_driver *dai; |
8380222e | 519 | |
ad3ab1bb | 520 | ssi = devm_kzalloc(&pdev->dev, sizeof(*ssi), GFP_KERNEL); |
8380222e SH |
521 | if (!ssi) |
522 | return -ENOMEM; | |
f0fba2ad | 523 | dev_set_drvdata(&pdev->dev, ssi); |
8380222e SH |
524 | |
525 | if (pdata) { | |
526 | ssi->ac97_reset = pdata->ac97_reset; | |
527 | ssi->ac97_warm_reset = pdata->ac97_warm_reset; | |
528 | ssi->flags = pdata->flags; | |
529 | } | |
530 | ||
8380222e SH |
531 | ssi->irq = platform_get_irq(pdev, 0); |
532 | ||
ad3ab1bb | 533 | ssi->clk = devm_clk_get(&pdev->dev, NULL); |
8380222e SH |
534 | if (IS_ERR(ssi->clk)) { |
535 | ret = PTR_ERR(ssi->clk); | |
536 | dev_err(&pdev->dev, "Cannot get the clock: %d\n", | |
537 | ret); | |
538 | goto failed_clk; | |
539 | } | |
24f4bd57 FE |
540 | ret = clk_prepare_enable(ssi->clk); |
541 | if (ret) | |
542 | goto failed_clk; | |
8380222e SH |
543 | |
544 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
b25b5aa0 TR |
545 | ssi->base = devm_ioremap_resource(&pdev->dev, res); |
546 | if (IS_ERR(ssi->base)) { | |
547 | ret = PTR_ERR(ssi->base); | |
ad3ab1bb | 548 | goto failed_register; |
8380222e SH |
549 | } |
550 | ||
551 | if (ssi->flags & IMX_SSI_USE_AC97) { | |
552 | if (ac97_ssi) { | |
a0f1e98b | 553 | dev_err(&pdev->dev, "AC'97 SSI already registered\n"); |
8380222e | 554 | ret = -EBUSY; |
ad3ab1bb | 555 | goto failed_register; |
8380222e SH |
556 | } |
557 | ac97_ssi = ssi; | |
558 | setup_channel_to_ac97(ssi); | |
f0fba2ad | 559 | dai = &imx_ac97_dai; |
8380222e | 560 | } else |
f0fba2ad | 561 | dai = &imx_ssi_dai; |
8380222e SH |
562 | |
563 | writel(0x0, ssi->base + SSI_SIER); | |
564 | ||
a8909c9b LPC |
565 | ssi->dma_params_rx.addr = res->start + SSI_SRX0; |
566 | ssi->dma_params_tx.addr = res->start + SSI_STX0; | |
8380222e | 567 | |
a8909c9b LPC |
568 | ssi->dma_params_tx.maxburst = 6; |
569 | ssi->dma_params_rx.maxburst = 4; | |
570 | ||
571 | ssi->dma_params_tx.filter_data = &ssi->filter_data_tx; | |
572 | ssi->dma_params_rx.filter_data = &ssi->filter_data_rx; | |
0a93421b | 573 | |
8380222e | 574 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx0"); |
312bb4f6 | 575 | if (res) { |
a8909c9b | 576 | imx_pcm_dma_params_init_data(&ssi->filter_data_tx, res->start, |
32bd8cd2 | 577 | IMX_DMATYPE_SSI); |
312bb4f6 | 578 | } |
8380222e SH |
579 | |
580 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx0"); | |
312bb4f6 | 581 | if (res) { |
a8909c9b | 582 | imx_pcm_dma_params_init_data(&ssi->filter_data_rx, res->start, |
32bd8cd2 | 583 | IMX_DMATYPE_SSI); |
312bb4f6 | 584 | } |
8380222e | 585 | |
f0fba2ad | 586 | platform_set_drvdata(pdev, ssi); |
8380222e | 587 | |
b047e1cc MB |
588 | ret = snd_soc_set_ac97_ops(&imx_ssi_ac97_ops); |
589 | if (ret != 0) { | |
590 | dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret); | |
591 | goto failed_register; | |
592 | } | |
593 | ||
c22fd5ef KM |
594 | ret = snd_soc_register_component(&pdev->dev, &imx_component, |
595 | dai, 1); | |
8380222e SH |
596 | if (ret) { |
597 | dev_err(&pdev->dev, "register DAI failed\n"); | |
598 | goto failed_register; | |
599 | } | |
600 | ||
9051cba1 MP |
601 | ssi->fiq_params.irq = ssi->irq; |
602 | ssi->fiq_params.base = ssi->base; | |
603 | ssi->fiq_params.dma_params_rx = &ssi->dma_params_rx; | |
604 | ssi->fiq_params.dma_params_tx = &ssi->dma_params_tx; | |
605 | ||
5a6e19be PR |
606 | ssi->fiq_init = imx_pcm_fiq_init(pdev, &ssi->fiq_params); |
607 | ssi->dma_init = imx_pcm_dma_init(pdev); | |
f562be51 | 608 | |
5a6e19be PR |
609 | if (ssi->fiq_init && ssi->dma_init) { |
610 | ret = ssi->fiq_init; | |
611 | goto failed_pcm; | |
612 | } | |
8380222e SH |
613 | |
614 | return 0; | |
615 | ||
5a6e19be | 616 | failed_pcm: |
c22fd5ef | 617 | snd_soc_unregister_component(&pdev->dev); |
8380222e | 618 | failed_register: |
41c73b6e | 619 | clk_disable_unprepare(ssi->clk); |
8380222e | 620 | failed_clk: |
b047e1cc | 621 | snd_soc_set_ac97_ops(NULL); |
8380222e SH |
622 | |
623 | return ret; | |
624 | } | |
625 | ||
a0a3d518 | 626 | static int imx_ssi_remove(struct platform_device *pdev) |
8380222e | 627 | { |
8380222e SH |
628 | struct imx_ssi *ssi = platform_get_drvdata(pdev); |
629 | ||
5a6e19be PR |
630 | if (!ssi->fiq_init) |
631 | imx_pcm_fiq_exit(pdev); | |
f0fba2ad | 632 | |
c22fd5ef | 633 | snd_soc_unregister_component(&pdev->dev); |
8380222e SH |
634 | |
635 | if (ssi->flags & IMX_SSI_USE_AC97) | |
636 | ac97_ssi = NULL; | |
637 | ||
41c73b6e | 638 | clk_disable_unprepare(ssi->clk); |
b047e1cc | 639 | snd_soc_set_ac97_ops(NULL); |
8380222e SH |
640 | |
641 | return 0; | |
642 | } | |
643 | ||
644 | static struct platform_driver imx_ssi_driver = { | |
645 | .probe = imx_ssi_probe, | |
a0a3d518 | 646 | .remove = imx_ssi_remove, |
8380222e SH |
647 | |
648 | .driver = { | |
205d231b | 649 | .name = "imx-ssi", |
8380222e SH |
650 | }, |
651 | }; | |
652 | ||
7a24b2ba | 653 | module_platform_driver(imx_ssi_driver); |
8380222e SH |
654 | |
655 | /* Module information */ | |
656 | MODULE_AUTHOR("Sascha Hauer, <s.hauer@pengutronix.de>"); | |
657 | MODULE_DESCRIPTION("i.MX I2S/ac97 SoC Interface"); | |
658 | MODULE_LICENSE("GPL"); | |
96dcabb9 | 659 | MODULE_ALIAS("platform:imx-ssi"); |