1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * kirkwood-i2s.c |
4 | * |
5 | * (c) 2010 Arnaud Patard <apatard@mandriva.com> |
6 | * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org> |
7 | */ |
8 | |
9 | #include <linux/init.h> |
10 | #include <linux/module.h> |
11 | #include <linux/platform_device.h> |
12 | #include <linux/io.h> |
13 | #include <linux/slab.h> |
14 | #include <linux/mbus.h> |
15 | #include <linux/delay.h> |
16 | #include <linux/clk.h> |
17 | #include <sound/pcm.h> |
18 | #include <sound/pcm_params.h> |
19 | #include <sound/soc.h> |
20 | #include <linux/platform_data/asoc-kirkwood.h> |
21 | #include <linux/of.h> |
22 | |
23 | #include "kirkwood.h" |
24 | |
25 | #define KIRKWOOD_I2S_FORMATS \ |
26 | (SNDRV_PCM_FMTBIT_S16_LE | \ |
27 | SNDRV_PCM_FMTBIT_S24_LE | \ |
28 | SNDRV_PCM_FMTBIT_S32_LE) |
29 | |
30 | #define KIRKWOOD_SPDIF_FORMATS \ |
31 | (SNDRV_PCM_FMTBIT_S16_LE | \ |
32 | SNDRV_PCM_FMTBIT_S24_LE) |
33 | |
34 | /* These registers are relative to the second register region - |
35 | * audio pll configuration. |
36 | */ |
37 | #define A38X_PLL_CONF_REG0 0x0 |
38 | #define A38X_PLL_FB_CLK_DIV_OFFSET 10 |
39 | #define A38X_PLL_FB_CLK_DIV_MASK 0x7fc00 |
40 | #define A38X_PLL_CONF_REG1 0x4 |
41 | #define A38X_PLL_FREQ_OFFSET_MASK 0xffff |
42 | #define A38X_PLL_FREQ_OFFSET_VALID BIT(16) |
43 | #define A38X_PLL_SW_RESET BIT(31) |
44 | #define A38X_PLL_CONF_REG2 0x8 |
45 | #define A38X_PLL_AUDIO_POSTDIV_MASK 0x7f |
46 | |
47 | /* Bit below belongs to SoC control register corresponding to the third |
48 | * register region. |
49 | */ |
50 | #define A38X_SPDIF_MODE_ENABLE BIT(27) |
51 | |
52 | static int armada_38x_i2s_init_quirk(struct platform_device *pdev, |
53 | struct kirkwood_dma_data *priv, |
54 | struct snd_soc_dai_driver *dai_drv) |
55 | { |
56 | struct device_node *np = pdev->dev.of_node; |
57 | u32 reg_val; |
58 | int i; |
59 | |
60 | priv->pll_config = devm_platform_ioremap_resource_byname(pdev, name: "pll_regs" ); |
61 | if (IS_ERR(ptr: priv->pll_config)) |
62 | return -ENOMEM; |
63 | |
64 | priv->soc_control = devm_platform_ioremap_resource_byname(pdev, name: "soc_ctrl" ); |
65 | if (IS_ERR(ptr: priv->soc_control)) |
66 | return -ENOMEM; |
67 | |
68 | /* Select one of exceptive modes: I2S or S/PDIF */ |
69 | reg_val = readl(addr: priv->soc_control); |
70 | if (of_property_read_bool(np, propname: "spdif-mode" )) { |
71 | reg_val |= A38X_SPDIF_MODE_ENABLE; |
72 | dev_info(&pdev->dev, "using S/PDIF mode\n" ); |
73 | } else { |
74 | reg_val &= ~A38X_SPDIF_MODE_ENABLE; |
75 | dev_info(&pdev->dev, "using I2S mode\n" ); |
76 | } |
77 | writel(val: reg_val, addr: priv->soc_control); |
78 | |
79 | /* Update available rates of mclk's fs */ |
80 | for (i = 0; i < 2; i++) { |
81 | dai_drv[i].playback.rates |= SNDRV_PCM_RATE_192000; |
82 | dai_drv[i].capture.rates |= SNDRV_PCM_RATE_192000; |
83 | } |
84 | |
85 | return 0; |
86 | } |
87 | |
88 | static inline void armada_38x_set_pll(void __iomem *base, unsigned long rate) |
89 | { |
90 | u32 reg_val; |
91 | u16 freq_offset = 0x22b0; |
92 | u8 audio_postdiv, fb_clk_div = 0x1d; |
93 | |
94 | /* Set frequency offset value to not valid and enable PLL reset */ |
95 | reg_val = readl(addr: base + A38X_PLL_CONF_REG1); |
96 | reg_val &= ~A38X_PLL_FREQ_OFFSET_VALID; |
97 | reg_val &= ~A38X_PLL_SW_RESET; |
98 | writel(val: reg_val, addr: base + A38X_PLL_CONF_REG1); |
99 | |
100 | udelay(1); |
101 | |
102 | /* Update PLL parameters */ |
103 | switch (rate) { |
104 | default: |
105 | case 44100: |
106 | freq_offset = 0x735; |
107 | fb_clk_div = 0x1b; |
108 | audio_postdiv = 0xc; |
109 | break; |
110 | case 48000: |
111 | audio_postdiv = 0xc; |
112 | break; |
113 | case 96000: |
114 | audio_postdiv = 0x6; |
115 | break; |
116 | case 192000: |
117 | audio_postdiv = 0x3; |
118 | break; |
119 | } |
120 | |
121 | reg_val = readl(addr: base + A38X_PLL_CONF_REG0); |
122 | reg_val &= ~A38X_PLL_FB_CLK_DIV_MASK; |
123 | reg_val |= (fb_clk_div << A38X_PLL_FB_CLK_DIV_OFFSET); |
124 | writel(val: reg_val, addr: base + A38X_PLL_CONF_REG0); |
125 | |
126 | reg_val = readl(addr: base + A38X_PLL_CONF_REG2); |
127 | reg_val &= ~A38X_PLL_AUDIO_POSTDIV_MASK; |
128 | reg_val |= audio_postdiv; |
129 | writel(val: reg_val, addr: base + A38X_PLL_CONF_REG2); |
130 | |
131 | reg_val = readl(addr: base + A38X_PLL_CONF_REG1); |
132 | reg_val &= ~A38X_PLL_FREQ_OFFSET_MASK; |
133 | reg_val |= freq_offset; |
134 | writel(val: reg_val, addr: base + A38X_PLL_CONF_REG1); |
135 | |
136 | udelay(1); |
137 | |
138 | /* Disable reset */ |
139 | reg_val |= A38X_PLL_SW_RESET; |
140 | writel(val: reg_val, addr: base + A38X_PLL_CONF_REG1); |
141 | |
142 | /* Wait 50us for PLL to lock */ |
143 | udelay(50); |
144 | |
145 | /* Restore frequency offset value validity */ |
146 | reg_val |= A38X_PLL_FREQ_OFFSET_VALID; |
147 | writel(val: reg_val, addr: base + A38X_PLL_CONF_REG1); |
148 | } |
149 | |
150 | static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai, |
151 | unsigned int fmt) |
152 | { |
153 | struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai: cpu_dai); |
154 | unsigned long mask; |
155 | unsigned long value; |
156 | |
157 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
158 | case SND_SOC_DAIFMT_RIGHT_J: |
159 | mask = KIRKWOOD_I2S_CTL_RJ; |
160 | break; |
161 | case SND_SOC_DAIFMT_LEFT_J: |
162 | mask = KIRKWOOD_I2S_CTL_LJ; |
163 | break; |
164 | case SND_SOC_DAIFMT_I2S: |
165 | mask = KIRKWOOD_I2S_CTL_I2S; |
166 | break; |
167 | default: |
168 | return -EINVAL; |
169 | } |
170 | |
171 | /* |
172 | * Set same format for playback and record |
173 | * This avoids some troubles. |
174 | */ |
175 | value = readl(addr: priv->io+KIRKWOOD_I2S_PLAYCTL); |
176 | value &= ~KIRKWOOD_I2S_CTL_JUST_MASK; |
177 | value |= mask; |
178 | writel(val: value, addr: priv->io+KIRKWOOD_I2S_PLAYCTL); |
179 | |
180 | value = readl(addr: priv->io+KIRKWOOD_I2S_RECCTL); |
181 | value &= ~KIRKWOOD_I2S_CTL_JUST_MASK; |
182 | value |= mask; |
183 | writel(val: value, addr: priv->io+KIRKWOOD_I2S_RECCTL); |
184 | |
185 | return 0; |
186 | } |
187 | |
188 | static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate) |
189 | { |
190 | unsigned long value; |
191 | |
192 | value = KIRKWOOD_DCO_CTL_OFFSET_0; |
193 | switch (rate) { |
194 | default: |
195 | case 44100: |
196 | value |= KIRKWOOD_DCO_CTL_FREQ_11; |
197 | break; |
198 | case 48000: |
199 | value |= KIRKWOOD_DCO_CTL_FREQ_12; |
200 | break; |
201 | case 96000: |
202 | value |= KIRKWOOD_DCO_CTL_FREQ_24; |
203 | break; |
204 | } |
205 | writel(val: value, addr: io + KIRKWOOD_DCO_CTL); |
206 | |
207 | /* wait for dco locked */ |
208 | do { |
209 | cpu_relax(); |
210 | value = readl(addr: io + KIRKWOOD_DCO_SPCR_STATUS); |
211 | value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK; |
212 | } while (value == 0); |
213 | } |
214 | |
215 | static void kirkwood_set_rate(struct snd_soc_dai *dai, |
216 | struct kirkwood_dma_data *priv, unsigned long rate) |
217 | { |
218 | uint32_t clks_ctrl; |
219 | |
220 | if (IS_ERR(ptr: priv->extclk)) { |
221 | /* use internal dco for the supported rates |
222 | * defined in kirkwood_i2s_dai */ |
223 | dev_dbg(dai->dev, "%s: dco set rate = %lu\n" , |
224 | __func__, rate); |
225 | if (priv->pll_config) |
226 | armada_38x_set_pll(base: priv->pll_config, rate); |
227 | else |
228 | kirkwood_set_dco(io: priv->io, rate); |
229 | |
230 | clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO; |
231 | } else { |
232 | /* use the external clock for the other rates |
233 | * defined in kirkwood_i2s_dai_extclk */ |
234 | dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n" , |
235 | __func__, rate, 256 * rate); |
236 | clk_set_rate(clk: priv->extclk, rate: 256 * rate); |
237 | |
238 | clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK; |
239 | } |
240 | writel(val: clks_ctrl, addr: priv->io + KIRKWOOD_CLOCKS_CTRL); |
241 | } |
242 | |
243 | static int kirkwood_i2s_startup(struct snd_pcm_substream *substream, |
244 | struct snd_soc_dai *dai) |
245 | { |
246 | struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai); |
247 | |
248 | snd_soc_dai_set_dma_data(dai, substream, priv); |
249 | return 0; |
250 | } |
251 | |
252 | static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream, |
253 | struct snd_pcm_hw_params *params, |
254 | struct snd_soc_dai *dai) |
255 | { |
256 | struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai); |
257 | uint32_t ctl_play, ctl_rec; |
258 | unsigned int i2s_reg; |
259 | unsigned long i2s_value; |
260 | |
261 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
262 | i2s_reg = KIRKWOOD_I2S_PLAYCTL; |
263 | } else { |
264 | i2s_reg = KIRKWOOD_I2S_RECCTL; |
265 | } |
266 | |
267 | kirkwood_set_rate(dai, priv, rate: params_rate(p: params)); |
268 | |
269 | i2s_value = readl(addr: priv->io+i2s_reg); |
270 | i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK; |
271 | |
272 | /* |
273 | * Size settings in play/rec i2s control regs and play/rec control |
274 | * regs must be the same. |
275 | */ |
276 | switch (params_format(p: params)) { |
277 | case SNDRV_PCM_FORMAT_S16_LE: |
278 | i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16; |
279 | ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C | |
280 | KIRKWOOD_PLAYCTL_I2S_EN | |
281 | KIRKWOOD_PLAYCTL_SPDIF_EN; |
282 | ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C | |
283 | KIRKWOOD_RECCTL_I2S_EN | |
284 | KIRKWOOD_RECCTL_SPDIF_EN; |
285 | break; |
286 | /* |
287 | * doesn't work... S20_3LE != kirkwood 20bit format ? |
288 | * |
289 | case SNDRV_PCM_FORMAT_S20_3LE: |
290 | i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20; |
291 | ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 | |
292 | KIRKWOOD_PLAYCTL_I2S_EN; |
293 | ctl_rec = KIRKWOOD_RECCTL_SIZE_20 | |
294 | KIRKWOOD_RECCTL_I2S_EN; |
295 | break; |
296 | */ |
297 | case SNDRV_PCM_FORMAT_S24_LE: |
298 | i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24; |
299 | ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 | |
300 | KIRKWOOD_PLAYCTL_I2S_EN | |
301 | KIRKWOOD_PLAYCTL_SPDIF_EN; |
302 | ctl_rec = KIRKWOOD_RECCTL_SIZE_24 | |
303 | KIRKWOOD_RECCTL_I2S_EN | |
304 | KIRKWOOD_RECCTL_SPDIF_EN; |
305 | break; |
306 | case SNDRV_PCM_FORMAT_S32_LE: |
307 | i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32; |
308 | ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 | |
309 | KIRKWOOD_PLAYCTL_I2S_EN; |
310 | ctl_rec = KIRKWOOD_RECCTL_SIZE_32 | |
311 | KIRKWOOD_RECCTL_I2S_EN; |
312 | break; |
313 | default: |
314 | return -EINVAL; |
315 | } |
316 | |
317 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
318 | if (params_channels(p: params) == 1) |
319 | ctl_play |= KIRKWOOD_PLAYCTL_MONO_BOTH; |
320 | else |
321 | ctl_play |= KIRKWOOD_PLAYCTL_MONO_OFF; |
322 | |
323 | priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK | |
324 | KIRKWOOD_PLAYCTL_ENABLE_MASK | |
325 | KIRKWOOD_PLAYCTL_SIZE_MASK); |
326 | priv->ctl_play |= ctl_play; |
327 | } else { |
328 | priv->ctl_rec &= ~(KIRKWOOD_RECCTL_ENABLE_MASK | |
329 | KIRKWOOD_RECCTL_SIZE_MASK); |
330 | priv->ctl_rec |= ctl_rec; |
331 | } |
332 | |
333 | writel(val: i2s_value, addr: priv->io+i2s_reg); |
334 | |
335 | return 0; |
336 | } |
337 | |
338 | static unsigned kirkwood_i2s_play_mute(unsigned ctl) |
339 | { |
340 | if (!(ctl & KIRKWOOD_PLAYCTL_I2S_EN)) |
341 | ctl |= KIRKWOOD_PLAYCTL_I2S_MUTE; |
342 | if (!(ctl & KIRKWOOD_PLAYCTL_SPDIF_EN)) |
343 | ctl |= KIRKWOOD_PLAYCTL_SPDIF_MUTE; |
344 | return ctl; |
345 | } |
346 | |
347 | static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream, |
348 | int cmd, struct snd_soc_dai *dai) |
349 | { |
350 | struct snd_pcm_runtime *runtime = substream->runtime; |
351 | struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai); |
352 | uint32_t ctl, value; |
353 | |
354 | ctl = readl(addr: priv->io + KIRKWOOD_PLAYCTL); |
355 | if ((ctl & KIRKWOOD_PLAYCTL_ENABLE_MASK) == 0) { |
356 | unsigned timeout = 5000; |
357 | /* |
358 | * The Armada510 spec says that if we enter pause mode, the |
359 | * busy bit must be read back as clear _twice_. Make sure |
360 | * we respect that otherwise we get DMA underruns. |
361 | */ |
362 | do { |
363 | value = ctl; |
364 | ctl = readl(addr: priv->io + KIRKWOOD_PLAYCTL); |
365 | if (!((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)) |
366 | break; |
367 | udelay(1); |
368 | } while (timeout--); |
369 | |
370 | if ((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY) |
371 | dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n" , |
372 | ctl); |
373 | } |
374 | |
375 | switch (cmd) { |
376 | case SNDRV_PCM_TRIGGER_START: |
377 | /* configure */ |
378 | ctl = priv->ctl_play; |
379 | if (dai->id == 0) |
380 | ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN; /* i2s */ |
381 | else |
382 | ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN; /* spdif */ |
383 | ctl = kirkwood_i2s_play_mute(ctl); |
384 | value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK; |
385 | writel(val: value, addr: priv->io + KIRKWOOD_PLAYCTL); |
386 | |
387 | /* enable interrupts */ |
388 | if (!runtime->no_period_wakeup) { |
389 | value = readl(addr: priv->io + KIRKWOOD_INT_MASK); |
390 | value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES; |
391 | writel(val: value, addr: priv->io + KIRKWOOD_INT_MASK); |
392 | } |
393 | |
394 | /* enable playback */ |
395 | writel(val: ctl, addr: priv->io + KIRKWOOD_PLAYCTL); |
396 | break; |
397 | |
398 | case SNDRV_PCM_TRIGGER_STOP: |
399 | /* stop audio, disable interrupts */ |
400 | ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE | |
401 | KIRKWOOD_PLAYCTL_SPDIF_MUTE; |
402 | writel(val: ctl, addr: priv->io + KIRKWOOD_PLAYCTL); |
403 | |
404 | value = readl(addr: priv->io + KIRKWOOD_INT_MASK); |
405 | value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES; |
406 | writel(val: value, addr: priv->io + KIRKWOOD_INT_MASK); |
407 | |
408 | /* disable all playbacks */ |
409 | ctl &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK; |
410 | writel(val: ctl, addr: priv->io + KIRKWOOD_PLAYCTL); |
411 | break; |
412 | |
413 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
414 | case SNDRV_PCM_TRIGGER_SUSPEND: |
415 | ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE | |
416 | KIRKWOOD_PLAYCTL_SPDIF_MUTE; |
417 | writel(val: ctl, addr: priv->io + KIRKWOOD_PLAYCTL); |
418 | break; |
419 | |
420 | case SNDRV_PCM_TRIGGER_RESUME: |
421 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
422 | ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE | |
423 | KIRKWOOD_PLAYCTL_SPDIF_MUTE); |
424 | ctl = kirkwood_i2s_play_mute(ctl); |
425 | writel(val: ctl, addr: priv->io + KIRKWOOD_PLAYCTL); |
426 | break; |
427 | |
428 | default: |
429 | return -EINVAL; |
430 | } |
431 | |
432 | return 0; |
433 | } |
434 | |
435 | static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream, |
436 | int cmd, struct snd_soc_dai *dai) |
437 | { |
438 | struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai); |
439 | uint32_t ctl, value; |
440 | |
441 | value = readl(addr: priv->io + KIRKWOOD_RECCTL); |
442 | |
443 | switch (cmd) { |
444 | case SNDRV_PCM_TRIGGER_START: |
445 | /* configure */ |
446 | ctl = priv->ctl_rec; |
447 | if (dai->id == 0) |
448 | ctl &= ~KIRKWOOD_RECCTL_SPDIF_EN; /* i2s */ |
449 | else |
450 | ctl &= ~KIRKWOOD_RECCTL_I2S_EN; /* spdif */ |
451 | |
452 | value = ctl & ~KIRKWOOD_RECCTL_ENABLE_MASK; |
453 | writel(val: value, addr: priv->io + KIRKWOOD_RECCTL); |
454 | |
455 | /* enable interrupts */ |
456 | value = readl(addr: priv->io + KIRKWOOD_INT_MASK); |
457 | value |= KIRKWOOD_INT_CAUSE_REC_BYTES; |
458 | writel(val: value, addr: priv->io + KIRKWOOD_INT_MASK); |
459 | |
460 | /* enable record */ |
461 | writel(val: ctl, addr: priv->io + KIRKWOOD_RECCTL); |
462 | break; |
463 | |
464 | case SNDRV_PCM_TRIGGER_STOP: |
465 | /* stop audio, disable interrupts */ |
466 | value = readl(addr: priv->io + KIRKWOOD_RECCTL); |
467 | value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE; |
468 | writel(val: value, addr: priv->io + KIRKWOOD_RECCTL); |
469 | |
470 | value = readl(addr: priv->io + KIRKWOOD_INT_MASK); |
471 | value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES; |
472 | writel(val: value, addr: priv->io + KIRKWOOD_INT_MASK); |
473 | |
474 | /* disable all records */ |
475 | value = readl(addr: priv->io + KIRKWOOD_RECCTL); |
476 | value &= ~KIRKWOOD_RECCTL_ENABLE_MASK; |
477 | writel(val: value, addr: priv->io + KIRKWOOD_RECCTL); |
478 | break; |
479 | |
480 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
481 | case SNDRV_PCM_TRIGGER_SUSPEND: |
482 | value = readl(addr: priv->io + KIRKWOOD_RECCTL); |
483 | value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE; |
484 | writel(val: value, addr: priv->io + KIRKWOOD_RECCTL); |
485 | break; |
486 | |
487 | case SNDRV_PCM_TRIGGER_RESUME: |
488 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
489 | value = readl(addr: priv->io + KIRKWOOD_RECCTL); |
490 | value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE); |
491 | writel(val: value, addr: priv->io + KIRKWOOD_RECCTL); |
492 | break; |
493 | |
494 | default: |
495 | return -EINVAL; |
496 | } |
497 | |
498 | return 0; |
499 | } |
500 | |
501 | static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd, |
502 | struct snd_soc_dai *dai) |
503 | { |
504 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
505 | return kirkwood_i2s_play_trigger(substream, cmd, dai); |
506 | else |
507 | return kirkwood_i2s_rec_trigger(substream, cmd, dai); |
508 | |
509 | return 0; |
510 | } |
511 | |
512 | static int kirkwood_i2s_init(struct kirkwood_dma_data *priv) |
513 | { |
514 | unsigned long value; |
515 | unsigned int reg_data; |
516 | |
517 | /* put system in a "safe" state : */ |
518 | /* disable audio interrupts */ |
519 | writel(val: 0xffffffff, addr: priv->io + KIRKWOOD_INT_CAUSE); |
520 | writel(val: 0, addr: priv->io + KIRKWOOD_INT_MASK); |
521 | |
522 | reg_data = readl(addr: priv->io + 0x1200); |
523 | reg_data &= (~(0x333FF8)); |
524 | reg_data |= 0x111D18; |
525 | writel(val: reg_data, addr: priv->io + 0x1200); |
526 | |
527 | msleep(msecs: 500); |
528 | |
529 | reg_data = readl(addr: priv->io + 0x1200); |
530 | reg_data &= (~(0x333FF8)); |
531 | reg_data |= 0x111D18; |
532 | writel(val: reg_data, addr: priv->io + 0x1200); |
533 | |
534 | /* disable playback/record */ |
535 | value = readl(addr: priv->io + KIRKWOOD_PLAYCTL); |
536 | value &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK; |
537 | writel(val: value, addr: priv->io + KIRKWOOD_PLAYCTL); |
538 | |
539 | value = readl(addr: priv->io + KIRKWOOD_RECCTL); |
540 | value &= ~KIRKWOOD_RECCTL_ENABLE_MASK; |
541 | writel(val: value, addr: priv->io + KIRKWOOD_RECCTL); |
542 | |
543 | return 0; |
544 | |
545 | } |
546 | |
547 | static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = { |
548 | .startup = kirkwood_i2s_startup, |
549 | .trigger = kirkwood_i2s_trigger, |
550 | .hw_params = kirkwood_i2s_hw_params, |
551 | .set_fmt = kirkwood_i2s_set_fmt, |
552 | }; |
553 | |
554 | static struct snd_soc_dai_driver kirkwood_i2s_dai[2] = { |
555 | { |
556 | .name = "i2s" , |
557 | .id = 0, |
558 | .playback = { |
559 | .channels_min = 1, |
560 | .channels_max = 2, |
561 | .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | |
562 | SNDRV_PCM_RATE_96000, |
563 | .formats = KIRKWOOD_I2S_FORMATS, |
564 | }, |
565 | .capture = { |
566 | .channels_min = 1, |
567 | .channels_max = 2, |
568 | .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | |
569 | SNDRV_PCM_RATE_96000, |
570 | .formats = KIRKWOOD_I2S_FORMATS, |
571 | }, |
572 | .ops = &kirkwood_i2s_dai_ops, |
573 | }, |
574 | { |
575 | .name = "spdif" , |
576 | .id = 1, |
577 | .playback = { |
578 | .channels_min = 1, |
579 | .channels_max = 2, |
580 | .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | |
581 | SNDRV_PCM_RATE_96000, |
582 | .formats = KIRKWOOD_SPDIF_FORMATS, |
583 | }, |
584 | .capture = { |
585 | .channels_min = 1, |
586 | .channels_max = 2, |
587 | .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | |
588 | SNDRV_PCM_RATE_96000, |
589 | .formats = KIRKWOOD_SPDIF_FORMATS, |
590 | }, |
591 | .ops = &kirkwood_i2s_dai_ops, |
592 | }, |
593 | }; |
594 | |
595 | static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk[2] = { |
596 | { |
597 | .name = "i2s" , |
598 | .id = 0, |
599 | .playback = { |
600 | .channels_min = 1, |
601 | .channels_max = 2, |
602 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
603 | .rate_min = 5512, |
604 | .rate_max = 192000, |
605 | .formats = KIRKWOOD_I2S_FORMATS, |
606 | }, |
607 | .capture = { |
608 | .channels_min = 1, |
609 | .channels_max = 2, |
610 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
611 | .rate_min = 5512, |
612 | .rate_max = 192000, |
613 | .formats = KIRKWOOD_I2S_FORMATS, |
614 | }, |
615 | .ops = &kirkwood_i2s_dai_ops, |
616 | }, |
617 | { |
618 | .name = "spdif" , |
619 | .id = 1, |
620 | .playback = { |
621 | .channels_min = 1, |
622 | .channels_max = 2, |
623 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
624 | .rate_min = 5512, |
625 | .rate_max = 192000, |
626 | .formats = KIRKWOOD_SPDIF_FORMATS, |
627 | }, |
628 | .capture = { |
629 | .channels_min = 1, |
630 | .channels_max = 2, |
631 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
632 | .rate_min = 5512, |
633 | .rate_max = 192000, |
634 | .formats = KIRKWOOD_SPDIF_FORMATS, |
635 | }, |
636 | .ops = &kirkwood_i2s_dai_ops, |
637 | }, |
638 | }; |
639 | |
640 | static int kirkwood_i2s_dev_probe(struct platform_device *pdev) |
641 | { |
642 | struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data; |
643 | struct snd_soc_dai_driver *soc_dai = kirkwood_i2s_dai; |
644 | struct kirkwood_dma_data *priv; |
645 | struct device_node *np = pdev->dev.of_node; |
646 | int err; |
647 | |
648 | priv = devm_kzalloc(dev: &pdev->dev, size: sizeof(*priv), GFP_KERNEL); |
649 | if (!priv) |
650 | return -ENOMEM; |
651 | |
652 | dev_set_drvdata(dev: &pdev->dev, data: priv); |
653 | |
654 | if (of_device_is_compatible(device: np, "marvell,armada-380-audio" )) |
655 | priv->io = devm_platform_ioremap_resource_byname(pdev, name: "i2s_regs" ); |
656 | else |
657 | priv->io = devm_platform_ioremap_resource(pdev, index: 0); |
658 | if (IS_ERR(ptr: priv->io)) |
659 | return PTR_ERR(ptr: priv->io); |
660 | |
661 | priv->irq = platform_get_irq(pdev, 0); |
662 | if (priv->irq < 0) |
663 | return priv->irq; |
664 | |
665 | if (of_device_is_compatible(device: np, "marvell,armada-380-audio" )) { |
666 | err = armada_38x_i2s_init_quirk(pdev, priv, dai_drv: soc_dai); |
667 | if (err < 0) |
668 | return err; |
669 | /* Set initial pll frequency */ |
670 | armada_38x_set_pll(base: priv->pll_config, rate: 44100); |
671 | } |
672 | |
673 | if (np) { |
674 | priv->burst = 128; /* might be 32 or 128 */ |
675 | } else if (data) { |
676 | priv->burst = data->burst; |
677 | } else { |
678 | dev_err(&pdev->dev, "no DT nor platform data ?!\n" ); |
679 | return -EINVAL; |
680 | } |
681 | |
682 | priv->clk = devm_clk_get(dev: &pdev->dev, id: np ? "internal" : NULL); |
683 | if (IS_ERR(ptr: priv->clk)) { |
684 | dev_err(&pdev->dev, "no clock\n" ); |
685 | return PTR_ERR(ptr: priv->clk); |
686 | } |
687 | |
688 | priv->extclk = devm_clk_get(dev: &pdev->dev, id: "extclk" ); |
689 | if (IS_ERR(ptr: priv->extclk)) { |
690 | if (PTR_ERR(ptr: priv->extclk) == -EPROBE_DEFER) |
691 | return -EPROBE_DEFER; |
692 | } else { |
693 | if (clk_is_match(p: priv->extclk, q: priv->clk)) { |
694 | devm_clk_put(dev: &pdev->dev, clk: priv->extclk); |
695 | priv->extclk = ERR_PTR(error: -EINVAL); |
696 | } else { |
697 | dev_info(&pdev->dev, "found external clock\n" ); |
698 | clk_prepare_enable(clk: priv->extclk); |
699 | soc_dai = kirkwood_i2s_dai_extclk; |
700 | } |
701 | } |
702 | |
703 | err = clk_prepare_enable(clk: priv->clk); |
704 | if (err < 0) |
705 | return err; |
706 | |
707 | /* Some sensible defaults - this reflects the powerup values */ |
708 | priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24; |
709 | priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24; |
710 | |
711 | /* Select the burst size */ |
712 | if (priv->burst == 32) { |
713 | priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_32; |
714 | priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_32; |
715 | } else { |
716 | priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_128; |
717 | priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_128; |
718 | } |
719 | |
720 | err = snd_soc_register_component(dev: &pdev->dev, component_driver: &kirkwood_soc_component, |
721 | dai_drv: soc_dai, num_dai: 2); |
722 | if (err) { |
723 | dev_err(&pdev->dev, "snd_soc_register_component failed\n" ); |
724 | goto err_component; |
725 | } |
726 | |
727 | kirkwood_i2s_init(priv); |
728 | |
729 | return 0; |
730 | |
731 | err_component: |
732 | if (!IS_ERR(ptr: priv->extclk)) |
733 | clk_disable_unprepare(clk: priv->extclk); |
734 | clk_disable_unprepare(clk: priv->clk); |
735 | |
736 | return err; |
737 | } |
738 | |
739 | static void kirkwood_i2s_dev_remove(struct platform_device *pdev) |
740 | { |
741 | struct kirkwood_dma_data *priv = dev_get_drvdata(dev: &pdev->dev); |
742 | |
743 | snd_soc_unregister_component(dev: &pdev->dev); |
744 | if (!IS_ERR(ptr: priv->extclk)) |
745 | clk_disable_unprepare(clk: priv->extclk); |
746 | clk_disable_unprepare(clk: priv->clk); |
747 | } |
748 | |
749 | #ifdef CONFIG_OF |
750 | static const struct of_device_id mvebu_audio_of_match[] = { |
751 | { .compatible = "marvell,kirkwood-audio" }, |
752 | { .compatible = "marvell,dove-audio" }, |
753 | { .compatible = "marvell,armada370-audio" }, |
754 | { .compatible = "marvell,armada-380-audio" }, |
755 | { } |
756 | }; |
757 | MODULE_DEVICE_TABLE(of, mvebu_audio_of_match); |
758 | #endif |
759 | |
760 | static struct platform_driver kirkwood_i2s_driver = { |
761 | .probe = kirkwood_i2s_dev_probe, |
762 | .remove_new = kirkwood_i2s_dev_remove, |
763 | .driver = { |
764 | .name = DRV_NAME, |
765 | .of_match_table = of_match_ptr(mvebu_audio_of_match), |
766 | }, |
767 | }; |
768 | |
769 | module_platform_driver(kirkwood_i2s_driver); |
770 | |
771 | /* Module information */ |
772 | MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>" ); |
773 | MODULE_DESCRIPTION("Kirkwood I2S SoC Interface" ); |
774 | MODULE_LICENSE("GPL" ); |
775 | MODULE_ALIAS("platform:mvebu-audio" ); |
776 | |