Commit | Line | Data |
---|---|---|
43550821 XL |
1 | /* |
2 | * Freescale ALSA SoC Digital Audio Interface (SAI) driver. | |
3 | * | |
4 | * Copyright 2012-2013 Freescale Semiconductor, Inc. | |
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 as published by the | |
8 | * Free Software Foundation, either version 2 of the License, or(at your | |
9 | * option) any later version. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/clk.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/dmaengine.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/of_address.h> | |
78957fc3 | 18 | #include <linux/regmap.h> |
43550821 XL |
19 | #include <linux/slab.h> |
20 | #include <sound/core.h> | |
21 | #include <sound/dmaengine_pcm.h> | |
22 | #include <sound/pcm_params.h> | |
23 | ||
24 | #include "fsl_sai.h" | |
c7540644 | 25 | #include "imx-pcm.h" |
43550821 | 26 | |
e2681a1b NC |
27 | #define FSL_SAI_FLAGS (FSL_SAI_CSR_SEIE |\ |
28 | FSL_SAI_CSR_FEIE) | |
29 | ||
30 | static irqreturn_t fsl_sai_isr(int irq, void *devid) | |
31 | { | |
32 | struct fsl_sai *sai = (struct fsl_sai *)devid; | |
33 | struct device *dev = &sai->pdev->dev; | |
413312aa NC |
34 | u32 flags, xcsr, mask; |
35 | bool irq_none = true; | |
36 | ||
37 | /* | |
38 | * Both IRQ status bits and IRQ mask bits are in the xCSR but | |
39 | * different shifts. And we here create a mask only for those | |
40 | * IRQs that we activated. | |
41 | */ | |
e2681a1b NC |
42 | mask = (FSL_SAI_FLAGS >> FSL_SAI_CSR_xIE_SHIFT) << FSL_SAI_CSR_xF_SHIFT; |
43 | ||
44 | /* Tx IRQ */ | |
45 | regmap_read(sai->regmap, FSL_SAI_TCSR, &xcsr); | |
413312aa NC |
46 | flags = xcsr & mask; |
47 | ||
48 | if (flags) | |
49 | irq_none = false; | |
50 | else | |
51 | goto irq_rx; | |
e2681a1b | 52 | |
413312aa | 53 | if (flags & FSL_SAI_CSR_WSF) |
e2681a1b NC |
54 | dev_dbg(dev, "isr: Start of Tx word detected\n"); |
55 | ||
413312aa | 56 | if (flags & FSL_SAI_CSR_SEF) |
e2681a1b NC |
57 | dev_warn(dev, "isr: Tx Frame sync error detected\n"); |
58 | ||
413312aa | 59 | if (flags & FSL_SAI_CSR_FEF) { |
e2681a1b NC |
60 | dev_warn(dev, "isr: Transmit underrun detected\n"); |
61 | /* FIFO reset for safety */ | |
62 | xcsr |= FSL_SAI_CSR_FR; | |
63 | } | |
64 | ||
413312aa | 65 | if (flags & FSL_SAI_CSR_FWF) |
e2681a1b NC |
66 | dev_dbg(dev, "isr: Enabled transmit FIFO is empty\n"); |
67 | ||
413312aa | 68 | if (flags & FSL_SAI_CSR_FRF) |
e2681a1b NC |
69 | dev_dbg(dev, "isr: Transmit FIFO watermark has been reached\n"); |
70 | ||
413312aa NC |
71 | flags &= FSL_SAI_CSR_xF_W_MASK; |
72 | xcsr &= ~FSL_SAI_CSR_xF_MASK; | |
73 | ||
74 | if (flags) | |
75 | regmap_write(sai->regmap, FSL_SAI_TCSR, flags | xcsr); | |
e2681a1b | 76 | |
413312aa | 77 | irq_rx: |
e2681a1b NC |
78 | /* Rx IRQ */ |
79 | regmap_read(sai->regmap, FSL_SAI_RCSR, &xcsr); | |
413312aa | 80 | flags = xcsr & mask; |
e2681a1b | 81 | |
413312aa NC |
82 | if (flags) |
83 | irq_none = false; | |
84 | else | |
85 | goto out; | |
86 | ||
87 | if (flags & FSL_SAI_CSR_WSF) | |
e2681a1b NC |
88 | dev_dbg(dev, "isr: Start of Rx word detected\n"); |
89 | ||
413312aa | 90 | if (flags & FSL_SAI_CSR_SEF) |
e2681a1b NC |
91 | dev_warn(dev, "isr: Rx Frame sync error detected\n"); |
92 | ||
413312aa | 93 | if (flags & FSL_SAI_CSR_FEF) { |
e2681a1b NC |
94 | dev_warn(dev, "isr: Receive overflow detected\n"); |
95 | /* FIFO reset for safety */ | |
96 | xcsr |= FSL_SAI_CSR_FR; | |
97 | } | |
98 | ||
413312aa | 99 | if (flags & FSL_SAI_CSR_FWF) |
e2681a1b NC |
100 | dev_dbg(dev, "isr: Enabled receive FIFO is full\n"); |
101 | ||
413312aa | 102 | if (flags & FSL_SAI_CSR_FRF) |
e2681a1b NC |
103 | dev_dbg(dev, "isr: Receive FIFO watermark has been reached\n"); |
104 | ||
413312aa NC |
105 | flags &= FSL_SAI_CSR_xF_W_MASK; |
106 | xcsr &= ~FSL_SAI_CSR_xF_MASK; | |
e2681a1b | 107 | |
413312aa | 108 | if (flags) |
4800f88b | 109 | regmap_write(sai->regmap, FSL_SAI_RCSR, flags | xcsr); |
413312aa NC |
110 | |
111 | out: | |
112 | if (irq_none) | |
113 | return IRQ_NONE; | |
114 | else | |
115 | return IRQ_HANDLED; | |
e2681a1b NC |
116 | } |
117 | ||
43550821 XL |
118 | static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai, |
119 | int clk_id, unsigned int freq, int fsl_dir) | |
120 | { | |
43550821 | 121 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
2a266f8b NC |
122 | bool tx = fsl_dir == FSL_FMT_TRANSMITTER; |
123 | u32 val_cr2 = 0; | |
633ff8f8 | 124 | |
43550821 XL |
125 | switch (clk_id) { |
126 | case FSL_SAI_CLK_BUS: | |
43550821 XL |
127 | val_cr2 |= FSL_SAI_CR2_MSEL_BUS; |
128 | break; | |
129 | case FSL_SAI_CLK_MAST1: | |
43550821 XL |
130 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK1; |
131 | break; | |
132 | case FSL_SAI_CLK_MAST2: | |
43550821 XL |
133 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK2; |
134 | break; | |
135 | case FSL_SAI_CLK_MAST3: | |
43550821 XL |
136 | val_cr2 |= FSL_SAI_CR2_MSEL_MCLK3; |
137 | break; | |
138 | default: | |
139 | return -EINVAL; | |
140 | } | |
633ff8f8 | 141 | |
2a266f8b NC |
142 | regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx), |
143 | FSL_SAI_CR2_MSEL_MASK, val_cr2); | |
43550821 XL |
144 | |
145 | return 0; | |
146 | } | |
147 | ||
148 | static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai, | |
149 | int clk_id, unsigned int freq, int dir) | |
150 | { | |
4e3a99f5 | 151 | int ret; |
43550821 XL |
152 | |
153 | if (dir == SND_SOC_CLOCK_IN) | |
154 | return 0; | |
155 | ||
43550821 XL |
156 | ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, |
157 | FSL_FMT_TRANSMITTER); | |
158 | if (ret) { | |
190af12d | 159 | dev_err(cpu_dai->dev, "Cannot set tx sysclk: %d\n", ret); |
78957fc3 | 160 | return ret; |
43550821 XL |
161 | } |
162 | ||
163 | ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, | |
164 | FSL_FMT_RECEIVER); | |
78957fc3 | 165 | if (ret) |
190af12d | 166 | dev_err(cpu_dai->dev, "Cannot set rx sysclk: %d\n", ret); |
43550821 | 167 | |
1fb2d9d7 | 168 | return ret; |
43550821 XL |
169 | } |
170 | ||
171 | static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai, | |
172 | unsigned int fmt, int fsl_dir) | |
173 | { | |
43550821 | 174 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
2a266f8b NC |
175 | bool tx = fsl_dir == FSL_FMT_TRANSMITTER; |
176 | u32 val_cr2 = 0, val_cr4 = 0; | |
43550821 | 177 | |
2a266f8b | 178 | if (!sai->big_endian_data) |
72aa62be | 179 | val_cr4 |= FSL_SAI_CR4_MF; |
43550821 | 180 | |
13cde090 | 181 | /* DAI mode */ |
43550821 XL |
182 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
183 | case SND_SOC_DAIFMT_I2S: | |
a3f7dcc9 XL |
184 | /* |
185 | * Frame low, 1clk before data, one word length for frame sync, | |
186 | * frame sync starts one serial clock cycle earlier, | |
187 | * that is, together with the last bit of the previous | |
188 | * data word. | |
189 | */ | |
ef33bc32 | 190 | val_cr2 |= FSL_SAI_CR2_BCP; |
13cde090 XL |
191 | val_cr4 |= FSL_SAI_CR4_FSE | FSL_SAI_CR4_FSP; |
192 | break; | |
193 | case SND_SOC_DAIFMT_LEFT_J: | |
a3f7dcc9 XL |
194 | /* |
195 | * Frame high, one word length for frame sync, | |
196 | * frame sync asserts with the first bit of the frame. | |
197 | */ | |
ef33bc32 | 198 | val_cr2 |= FSL_SAI_CR2_BCP; |
43550821 | 199 | break; |
a3f7dcc9 XL |
200 | case SND_SOC_DAIFMT_DSP_A: |
201 | /* | |
202 | * Frame high, 1clk before data, one bit for frame sync, | |
203 | * frame sync starts one serial clock cycle earlier, | |
204 | * that is, together with the last bit of the previous | |
205 | * data word. | |
206 | */ | |
ef33bc32 | 207 | val_cr2 |= FSL_SAI_CR2_BCP; |
a3f7dcc9 XL |
208 | val_cr4 |= FSL_SAI_CR4_FSE; |
209 | sai->is_dsp_mode = true; | |
210 | break; | |
211 | case SND_SOC_DAIFMT_DSP_B: | |
212 | /* | |
213 | * Frame high, one bit for frame sync, | |
214 | * frame sync asserts with the first bit of the frame. | |
215 | */ | |
ef33bc32 | 216 | val_cr2 |= FSL_SAI_CR2_BCP; |
a3f7dcc9 XL |
217 | sai->is_dsp_mode = true; |
218 | break; | |
13cde090 XL |
219 | case SND_SOC_DAIFMT_RIGHT_J: |
220 | /* To be done */ | |
43550821 XL |
221 | default: |
222 | return -EINVAL; | |
223 | } | |
224 | ||
13cde090 | 225 | /* DAI clock inversion */ |
43550821 XL |
226 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
227 | case SND_SOC_DAIFMT_IB_IF: | |
13cde090 XL |
228 | /* Invert both clocks */ |
229 | val_cr2 ^= FSL_SAI_CR2_BCP; | |
230 | val_cr4 ^= FSL_SAI_CR4_FSP; | |
43550821 XL |
231 | break; |
232 | case SND_SOC_DAIFMT_IB_NF: | |
13cde090 XL |
233 | /* Invert bit clock */ |
234 | val_cr2 ^= FSL_SAI_CR2_BCP; | |
43550821 XL |
235 | break; |
236 | case SND_SOC_DAIFMT_NB_IF: | |
13cde090 XL |
237 | /* Invert frame clock */ |
238 | val_cr4 ^= FSL_SAI_CR4_FSP; | |
43550821 XL |
239 | break; |
240 | case SND_SOC_DAIFMT_NB_NF: | |
13cde090 | 241 | /* Nothing to do for both normal cases */ |
43550821 XL |
242 | break; |
243 | default: | |
244 | return -EINVAL; | |
245 | } | |
246 | ||
13cde090 | 247 | /* DAI clock master masks */ |
43550821 XL |
248 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
249 | case SND_SOC_DAIFMT_CBS_CFS: | |
250 | val_cr2 |= FSL_SAI_CR2_BCD_MSTR; | |
251 | val_cr4 |= FSL_SAI_CR4_FSD_MSTR; | |
252 | break; | |
253 | case SND_SOC_DAIFMT_CBM_CFM: | |
43550821 | 254 | break; |
13cde090 XL |
255 | case SND_SOC_DAIFMT_CBS_CFM: |
256 | val_cr2 |= FSL_SAI_CR2_BCD_MSTR; | |
13cde090 XL |
257 | break; |
258 | case SND_SOC_DAIFMT_CBM_CFS: | |
13cde090 XL |
259 | val_cr4 |= FSL_SAI_CR4_FSD_MSTR; |
260 | break; | |
43550821 XL |
261 | default: |
262 | return -EINVAL; | |
263 | } | |
264 | ||
2a266f8b NC |
265 | regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx), |
266 | FSL_SAI_CR2_BCP | FSL_SAI_CR2_BCD_MSTR, val_cr2); | |
267 | regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx), | |
268 | FSL_SAI_CR4_MF | FSL_SAI_CR4_FSE | | |
269 | FSL_SAI_CR4_FSP | FSL_SAI_CR4_FSD_MSTR, val_cr4); | |
43550821 XL |
270 | |
271 | return 0; | |
272 | } | |
273 | ||
274 | static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) | |
275 | { | |
4e3a99f5 | 276 | int ret; |
43550821 | 277 | |
43550821 XL |
278 | ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_TRANSMITTER); |
279 | if (ret) { | |
190af12d | 280 | dev_err(cpu_dai->dev, "Cannot set tx format: %d\n", ret); |
78957fc3 | 281 | return ret; |
43550821 XL |
282 | } |
283 | ||
284 | ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_RECEIVER); | |
78957fc3 | 285 | if (ret) |
190af12d | 286 | dev_err(cpu_dai->dev, "Cannot set rx format: %d\n", ret); |
43550821 | 287 | |
1fb2d9d7 | 288 | return ret; |
43550821 XL |
289 | } |
290 | ||
291 | static int fsl_sai_hw_params(struct snd_pcm_substream *substream, | |
292 | struct snd_pcm_hw_params *params, | |
293 | struct snd_soc_dai *cpu_dai) | |
294 | { | |
4e3a99f5 | 295 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
2a266f8b | 296 | bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
43550821 | 297 | unsigned int channels = params_channels(params); |
1d700309 | 298 | u32 word_width = snd_pcm_format_width(params_format(params)); |
2a266f8b | 299 | u32 val_cr4 = 0, val_cr5 = 0; |
43550821 | 300 | |
a3f7dcc9 XL |
301 | if (!sai->is_dsp_mode) |
302 | val_cr4 |= FSL_SAI_CR4_SYWD(word_width); | |
303 | ||
43550821 XL |
304 | val_cr5 |= FSL_SAI_CR5_WNW(word_width); |
305 | val_cr5 |= FSL_SAI_CR5_W0W(word_width); | |
306 | ||
307 | if (sai->big_endian_data) | |
43550821 | 308 | val_cr5 |= FSL_SAI_CR5_FBT(0); |
72aa62be XL |
309 | else |
310 | val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1); | |
43550821 XL |
311 | |
312 | val_cr4 |= FSL_SAI_CR4_FRSZ(channels); | |
43550821 | 313 | |
2a266f8b NC |
314 | regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx), |
315 | FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK, | |
316 | val_cr4); | |
317 | regmap_update_bits(sai->regmap, FSL_SAI_xCR5(tx), | |
318 | FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK | | |
319 | FSL_SAI_CR5_FBT_MASK, val_cr5); | |
320 | regmap_write(sai->regmap, FSL_SAI_xMR(tx), ~0UL - ((1 << channels) - 1)); | |
43550821 XL |
321 | |
322 | return 0; | |
323 | } | |
324 | ||
325 | static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd, | |
326 | struct snd_soc_dai *cpu_dai) | |
327 | { | |
328 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); | |
e6b39846 | 329 | bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
c44b56af | 330 | u32 xcsr, count = 100; |
496a39d9 | 331 | |
a3f7dcc9 XL |
332 | /* |
333 | * The transmitter bit clock and frame sync are to be | |
334 | * used by both the transmitter and receiver. | |
335 | */ | |
78957fc3 XL |
336 | regmap_update_bits(sai->regmap, FSL_SAI_TCR2, FSL_SAI_CR2_SYNC, |
337 | ~FSL_SAI_CR2_SYNC); | |
338 | regmap_update_bits(sai->regmap, FSL_SAI_RCR2, FSL_SAI_CR2_SYNC, | |
339 | FSL_SAI_CR2_SYNC); | |
43550821 | 340 | |
a3f7dcc9 XL |
341 | /* |
342 | * It is recommended that the transmitter is the last enabled | |
343 | * and the first disabled. | |
344 | */ | |
43550821 XL |
345 | switch (cmd) { |
346 | case SNDRV_PCM_TRIGGER_START: | |
347 | case SNDRV_PCM_TRIGGER_RESUME: | |
348 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
a3fdc674 NC |
349 | regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx), |
350 | FSL_SAI_CSR_FRDE, FSL_SAI_CSR_FRDE); | |
351 | ||
f4075a8f NC |
352 | regmap_update_bits(sai->regmap, FSL_SAI_RCSR, |
353 | FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE); | |
354 | regmap_update_bits(sai->regmap, FSL_SAI_TCSR, | |
355 | FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE); | |
e5d0fa9c | 356 | |
8abba5d6 NC |
357 | regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx), |
358 | FSL_SAI_CSR_xIE_MASK, FSL_SAI_FLAGS); | |
43550821 | 359 | break; |
43550821 XL |
360 | case SNDRV_PCM_TRIGGER_STOP: |
361 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
362 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
e6b39846 NC |
363 | regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx), |
364 | FSL_SAI_CSR_FRDE, 0); | |
8abba5d6 NC |
365 | regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx), |
366 | FSL_SAI_CSR_xIE_MASK, 0); | |
e6b39846 | 367 | |
f84526cf | 368 | /* Check if the opposite FRDE is also disabled */ |
f4075a8f NC |
369 | regmap_read(sai->regmap, FSL_SAI_xCSR(!tx), &xcsr); |
370 | if (!(xcsr & FSL_SAI_CSR_FRDE)) { | |
eff952b7 | 371 | /* Disable both directions and reset their FIFOs */ |
e6b39846 | 372 | regmap_update_bits(sai->regmap, FSL_SAI_TCSR, |
c44b56af | 373 | FSL_SAI_CSR_TERE, 0); |
e6b39846 | 374 | regmap_update_bits(sai->regmap, FSL_SAI_RCSR, |
c44b56af NC |
375 | FSL_SAI_CSR_TERE, 0); |
376 | ||
377 | /* TERE will remain set till the end of current frame */ | |
378 | do { | |
379 | udelay(10); | |
380 | regmap_read(sai->regmap, FSL_SAI_xCSR(tx), &xcsr); | |
381 | } while (--count && xcsr & FSL_SAI_CSR_TERE); | |
382 | ||
383 | regmap_update_bits(sai->regmap, FSL_SAI_TCSR, | |
384 | FSL_SAI_CSR_FR, FSL_SAI_CSR_FR); | |
385 | regmap_update_bits(sai->regmap, FSL_SAI_RCSR, | |
386 | FSL_SAI_CSR_FR, FSL_SAI_CSR_FR); | |
43550821 | 387 | } |
43550821 XL |
388 | break; |
389 | default: | |
390 | return -EINVAL; | |
391 | } | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static int fsl_sai_startup(struct snd_pcm_substream *substream, | |
397 | struct snd_soc_dai *cpu_dai) | |
398 | { | |
43550821 | 399 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); |
2a266f8b | 400 | bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
ca3e35c7 | 401 | struct device *dev = &sai->pdev->dev; |
ca3e35c7 NC |
402 | int ret; |
403 | ||
404 | ret = clk_prepare_enable(sai->bus_clk); | |
405 | if (ret) { | |
406 | dev_err(dev, "failed to enable bus clock: %d\n", ret); | |
407 | return ret; | |
408 | } | |
43550821 | 409 | |
2a266f8b | 410 | regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx), FSL_SAI_CR3_TRCE, |
78957fc3 XL |
411 | FSL_SAI_CR3_TRCE); |
412 | ||
413 | return 0; | |
43550821 XL |
414 | } |
415 | ||
416 | static void fsl_sai_shutdown(struct snd_pcm_substream *substream, | |
417 | struct snd_soc_dai *cpu_dai) | |
418 | { | |
419 | struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); | |
2a266f8b | 420 | bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
43550821 | 421 | |
2a266f8b | 422 | regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx), FSL_SAI_CR3_TRCE, 0); |
ca3e35c7 NC |
423 | |
424 | clk_disable_unprepare(sai->bus_clk); | |
43550821 XL |
425 | } |
426 | ||
427 | static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = { | |
428 | .set_sysclk = fsl_sai_set_dai_sysclk, | |
429 | .set_fmt = fsl_sai_set_dai_fmt, | |
430 | .hw_params = fsl_sai_hw_params, | |
431 | .trigger = fsl_sai_trigger, | |
432 | .startup = fsl_sai_startup, | |
433 | .shutdown = fsl_sai_shutdown, | |
434 | }; | |
435 | ||
436 | static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai) | |
437 | { | |
438 | struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev); | |
e6dc12d7 | 439 | |
376d1a92 NC |
440 | /* Software Reset for both Tx and Rx */ |
441 | regmap_write(sai->regmap, FSL_SAI_TCSR, FSL_SAI_CSR_SR); | |
442 | regmap_write(sai->regmap, FSL_SAI_RCSR, FSL_SAI_CSR_SR); | |
443 | /* Clear SR bit to finish the reset */ | |
444 | regmap_write(sai->regmap, FSL_SAI_TCSR, 0); | |
445 | regmap_write(sai->regmap, FSL_SAI_RCSR, 0); | |
446 | ||
78957fc3 XL |
447 | regmap_update_bits(sai->regmap, FSL_SAI_TCR1, FSL_SAI_CR1_RFW_MASK, |
448 | FSL_SAI_MAXBURST_TX * 2); | |
449 | regmap_update_bits(sai->regmap, FSL_SAI_RCR1, FSL_SAI_CR1_RFW_MASK, | |
450 | FSL_SAI_MAXBURST_RX - 1); | |
43550821 | 451 | |
dd9f4060 XL |
452 | snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx, |
453 | &sai->dma_params_rx); | |
43550821 XL |
454 | |
455 | snd_soc_dai_set_drvdata(cpu_dai, sai); | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
43550821 XL |
460 | static struct snd_soc_dai_driver fsl_sai_dai = { |
461 | .probe = fsl_sai_dai_probe, | |
43550821 | 462 | .playback = { |
20d5b76f | 463 | .stream_name = "CPU-Playback", |
43550821 XL |
464 | .channels_min = 1, |
465 | .channels_max = 2, | |
466 | .rates = SNDRV_PCM_RATE_8000_96000, | |
467 | .formats = FSL_SAI_FORMATS, | |
468 | }, | |
469 | .capture = { | |
20d5b76f | 470 | .stream_name = "CPU-Capture", |
43550821 XL |
471 | .channels_min = 1, |
472 | .channels_max = 2, | |
473 | .rates = SNDRV_PCM_RATE_8000_96000, | |
474 | .formats = FSL_SAI_FORMATS, | |
475 | }, | |
476 | .ops = &fsl_sai_pcm_dai_ops, | |
477 | }; | |
478 | ||
479 | static const struct snd_soc_component_driver fsl_component = { | |
480 | .name = "fsl-sai", | |
481 | }; | |
482 | ||
78957fc3 XL |
483 | static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg) |
484 | { | |
485 | switch (reg) { | |
486 | case FSL_SAI_TCSR: | |
487 | case FSL_SAI_TCR1: | |
488 | case FSL_SAI_TCR2: | |
489 | case FSL_SAI_TCR3: | |
490 | case FSL_SAI_TCR4: | |
491 | case FSL_SAI_TCR5: | |
492 | case FSL_SAI_TFR: | |
493 | case FSL_SAI_TMR: | |
494 | case FSL_SAI_RCSR: | |
495 | case FSL_SAI_RCR1: | |
496 | case FSL_SAI_RCR2: | |
497 | case FSL_SAI_RCR3: | |
498 | case FSL_SAI_RCR4: | |
499 | case FSL_SAI_RCR5: | |
500 | case FSL_SAI_RDR: | |
501 | case FSL_SAI_RFR: | |
502 | case FSL_SAI_RMR: | |
503 | return true; | |
504 | default: | |
505 | return false; | |
506 | } | |
507 | } | |
508 | ||
509 | static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg) | |
510 | { | |
511 | switch (reg) { | |
512 | case FSL_SAI_TFR: | |
513 | case FSL_SAI_RFR: | |
514 | case FSL_SAI_TDR: | |
515 | case FSL_SAI_RDR: | |
516 | return true; | |
517 | default: | |
518 | return false; | |
519 | } | |
520 | ||
521 | } | |
522 | ||
523 | static bool fsl_sai_writeable_reg(struct device *dev, unsigned int reg) | |
524 | { | |
525 | switch (reg) { | |
526 | case FSL_SAI_TCSR: | |
527 | case FSL_SAI_TCR1: | |
528 | case FSL_SAI_TCR2: | |
529 | case FSL_SAI_TCR3: | |
530 | case FSL_SAI_TCR4: | |
531 | case FSL_SAI_TCR5: | |
532 | case FSL_SAI_TDR: | |
533 | case FSL_SAI_TMR: | |
534 | case FSL_SAI_RCSR: | |
535 | case FSL_SAI_RCR1: | |
536 | case FSL_SAI_RCR2: | |
537 | case FSL_SAI_RCR3: | |
538 | case FSL_SAI_RCR4: | |
539 | case FSL_SAI_RCR5: | |
540 | case FSL_SAI_RMR: | |
541 | return true; | |
542 | default: | |
543 | return false; | |
544 | } | |
545 | } | |
546 | ||
547 | static struct regmap_config fsl_sai_regmap_config = { | |
548 | .reg_bits = 32, | |
549 | .reg_stride = 4, | |
550 | .val_bits = 32, | |
551 | ||
552 | .max_register = FSL_SAI_RMR, | |
553 | .readable_reg = fsl_sai_readable_reg, | |
554 | .volatile_reg = fsl_sai_volatile_reg, | |
555 | .writeable_reg = fsl_sai_writeable_reg, | |
556 | }; | |
557 | ||
43550821 XL |
558 | static int fsl_sai_probe(struct platform_device *pdev) |
559 | { | |
4e3a99f5 | 560 | struct device_node *np = pdev->dev.of_node; |
43550821 XL |
561 | struct fsl_sai *sai; |
562 | struct resource *res; | |
78957fc3 | 563 | void __iomem *base; |
ca3e35c7 NC |
564 | char tmp[8]; |
565 | int irq, ret, i; | |
43550821 XL |
566 | |
567 | sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL); | |
568 | if (!sai) | |
569 | return -ENOMEM; | |
570 | ||
e2681a1b NC |
571 | sai->pdev = pdev; |
572 | ||
c7540644 NC |
573 | if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx6sx-sai")) |
574 | sai->sai_on_imx = true; | |
575 | ||
78957fc3 XL |
576 | sai->big_endian_regs = of_property_read_bool(np, "big-endian-regs"); |
577 | if (sai->big_endian_regs) | |
578 | fsl_sai_regmap_config.val_format_endian = REGMAP_ENDIAN_BIG; | |
579 | ||
580 | sai->big_endian_data = of_property_read_bool(np, "big-endian-data"); | |
581 | ||
43550821 | 582 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
78957fc3 XL |
583 | base = devm_ioremap_resource(&pdev->dev, res); |
584 | if (IS_ERR(base)) | |
585 | return PTR_ERR(base); | |
586 | ||
587 | sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev, | |
ca3e35c7 NC |
588 | "bus", base, &fsl_sai_regmap_config); |
589 | ||
590 | /* Compatible with old DTB cases */ | |
591 | if (IS_ERR(sai->regmap)) | |
592 | sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev, | |
593 | "sai", base, &fsl_sai_regmap_config); | |
78957fc3 XL |
594 | if (IS_ERR(sai->regmap)) { |
595 | dev_err(&pdev->dev, "regmap init failed\n"); | |
596 | return PTR_ERR(sai->regmap); | |
43550821 XL |
597 | } |
598 | ||
ca3e35c7 NC |
599 | /* No error out for old DTB cases but only mark the clock NULL */ |
600 | sai->bus_clk = devm_clk_get(&pdev->dev, "bus"); | |
601 | if (IS_ERR(sai->bus_clk)) { | |
602 | dev_err(&pdev->dev, "failed to get bus clock: %ld\n", | |
603 | PTR_ERR(sai->bus_clk)); | |
604 | sai->bus_clk = NULL; | |
605 | } | |
606 | ||
607 | for (i = 0; i < FSL_SAI_MCLK_MAX; i++) { | |
608 | sprintf(tmp, "mclk%d", i + 1); | |
609 | sai->mclk_clk[i] = devm_clk_get(&pdev->dev, tmp); | |
610 | if (IS_ERR(sai->mclk_clk[i])) { | |
611 | dev_err(&pdev->dev, "failed to get mclk%d clock: %ld\n", | |
612 | i + 1, PTR_ERR(sai->mclk_clk[i])); | |
613 | sai->mclk_clk[i] = NULL; | |
614 | } | |
615 | } | |
616 | ||
e2681a1b NC |
617 | irq = platform_get_irq(pdev, 0); |
618 | if (irq < 0) { | |
619 | dev_err(&pdev->dev, "no irq for node %s\n", np->full_name); | |
620 | return irq; | |
621 | } | |
622 | ||
623 | ret = devm_request_irq(&pdev->dev, irq, fsl_sai_isr, 0, np->name, sai); | |
624 | if (ret) { | |
625 | dev_err(&pdev->dev, "failed to claim irq %u\n", irq); | |
626 | return ret; | |
627 | } | |
628 | ||
43550821 XL |
629 | sai->dma_params_rx.addr = res->start + FSL_SAI_RDR; |
630 | sai->dma_params_tx.addr = res->start + FSL_SAI_TDR; | |
631 | sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX; | |
632 | sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX; | |
633 | ||
43550821 XL |
634 | platform_set_drvdata(pdev, sai); |
635 | ||
636 | ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component, | |
637 | &fsl_sai_dai, 1); | |
638 | if (ret) | |
639 | return ret; | |
640 | ||
c7540644 NC |
641 | if (sai->sai_on_imx) |
642 | return imx_pcm_dma_init(pdev); | |
643 | else | |
644 | return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, | |
645 | SND_DMAENGINE_PCM_FLAG_NO_RESIDUE); | |
43550821 XL |
646 | } |
647 | ||
648 | static const struct of_device_id fsl_sai_ids[] = { | |
649 | { .compatible = "fsl,vf610-sai", }, | |
c7540644 | 650 | { .compatible = "fsl,imx6sx-sai", }, |
43550821 XL |
651 | { /* sentinel */ } |
652 | }; | |
653 | ||
654 | static struct platform_driver fsl_sai_driver = { | |
655 | .probe = fsl_sai_probe, | |
43550821 XL |
656 | .driver = { |
657 | .name = "fsl-sai", | |
658 | .owner = THIS_MODULE, | |
659 | .of_match_table = fsl_sai_ids, | |
660 | }, | |
661 | }; | |
662 | module_platform_driver(fsl_sai_driver); | |
663 | ||
664 | MODULE_DESCRIPTION("Freescale Soc SAI Interface"); | |
665 | MODULE_AUTHOR("Xiubo Li, <Li.Xiubo@freescale.com>"); | |
666 | MODULE_ALIAS("platform:fsl-sai"); | |
667 | MODULE_LICENSE("GPL"); |