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310355c1 VB |
1 | /* |
2 | * ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor | |
3 | * | |
d6b52039 | 4 | * Author: Vladimir Barinov, <vbarinov@embeddedalley.com> |
310355c1 VB |
5 | * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com> |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/init.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/device.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/io.h> | |
17 | #include <linux/clk.h> | |
18 | ||
19 | #include <sound/core.h> | |
20 | #include <sound/pcm.h> | |
21 | #include <sound/pcm_params.h> | |
22 | #include <sound/initval.h> | |
23 | #include <sound/soc.h> | |
24 | ||
25 | #include "davinci-pcm.h" | |
26 | ||
a62114cb DB |
27 | |
28 | /* | |
29 | * NOTE: terminology here is confusing. | |
30 | * | |
31 | * - This driver supports the "Audio Serial Port" (ASP), | |
32 | * found on dm6446, dm355, and other DaVinci chips. | |
33 | * | |
34 | * - But it labels it a "Multi-channel Buffered Serial Port" | |
35 | * (McBSP) as on older chips like the dm642 ... which was | |
36 | * backward-compatible, possibly explaining that confusion. | |
37 | * | |
38 | * - OMAP chips have a controller called McBSP, which is | |
39 | * incompatible with the DaVinci flavor of McBSP. | |
40 | * | |
41 | * - Newer DaVinci chips have a controller called McASP, | |
42 | * incompatible with ASP and with either McBSP. | |
43 | * | |
44 | * In short: this uses ASP to implement I2S, not McBSP. | |
45 | * And it won't be the only DaVinci implemention of I2S. | |
46 | */ | |
310355c1 VB |
47 | #define DAVINCI_MCBSP_DRR_REG 0x00 |
48 | #define DAVINCI_MCBSP_DXR_REG 0x04 | |
49 | #define DAVINCI_MCBSP_SPCR_REG 0x08 | |
50 | #define DAVINCI_MCBSP_RCR_REG 0x0c | |
51 | #define DAVINCI_MCBSP_XCR_REG 0x10 | |
52 | #define DAVINCI_MCBSP_SRGR_REG 0x14 | |
53 | #define DAVINCI_MCBSP_PCR_REG 0x24 | |
54 | ||
55 | #define DAVINCI_MCBSP_SPCR_RRST (1 << 0) | |
56 | #define DAVINCI_MCBSP_SPCR_RINTM(v) ((v) << 4) | |
57 | #define DAVINCI_MCBSP_SPCR_XRST (1 << 16) | |
58 | #define DAVINCI_MCBSP_SPCR_XINTM(v) ((v) << 20) | |
59 | #define DAVINCI_MCBSP_SPCR_GRST (1 << 22) | |
60 | #define DAVINCI_MCBSP_SPCR_FRST (1 << 23) | |
61 | #define DAVINCI_MCBSP_SPCR_FREE (1 << 25) | |
62 | ||
63 | #define DAVINCI_MCBSP_RCR_RWDLEN1(v) ((v) << 5) | |
64 | #define DAVINCI_MCBSP_RCR_RFRLEN1(v) ((v) << 8) | |
65 | #define DAVINCI_MCBSP_RCR_RDATDLY(v) ((v) << 16) | |
66 | #define DAVINCI_MCBSP_RCR_RWDLEN2(v) ((v) << 21) | |
67 | ||
68 | #define DAVINCI_MCBSP_XCR_XWDLEN1(v) ((v) << 5) | |
69 | #define DAVINCI_MCBSP_XCR_XFRLEN1(v) ((v) << 8) | |
70 | #define DAVINCI_MCBSP_XCR_XDATDLY(v) ((v) << 16) | |
71 | #define DAVINCI_MCBSP_XCR_XFIG (1 << 18) | |
72 | #define DAVINCI_MCBSP_XCR_XWDLEN2(v) ((v) << 21) | |
73 | ||
74 | #define DAVINCI_MCBSP_SRGR_FWID(v) ((v) << 8) | |
75 | #define DAVINCI_MCBSP_SRGR_FPER(v) ((v) << 16) | |
76 | #define DAVINCI_MCBSP_SRGR_FSGM (1 << 28) | |
77 | ||
78 | #define DAVINCI_MCBSP_PCR_CLKRP (1 << 0) | |
79 | #define DAVINCI_MCBSP_PCR_CLKXP (1 << 1) | |
80 | #define DAVINCI_MCBSP_PCR_FSRP (1 << 2) | |
81 | #define DAVINCI_MCBSP_PCR_FSXP (1 << 3) | |
b402dff8 | 82 | #define DAVINCI_MCBSP_PCR_SCLKME (1 << 7) |
310355c1 VB |
83 | #define DAVINCI_MCBSP_PCR_CLKRM (1 << 8) |
84 | #define DAVINCI_MCBSP_PCR_CLKXM (1 << 9) | |
85 | #define DAVINCI_MCBSP_PCR_FSRM (1 << 10) | |
86 | #define DAVINCI_MCBSP_PCR_FSXM (1 << 11) | |
87 | ||
310355c1 VB |
88 | enum { |
89 | DAVINCI_MCBSP_WORD_8 = 0, | |
90 | DAVINCI_MCBSP_WORD_12, | |
91 | DAVINCI_MCBSP_WORD_16, | |
92 | DAVINCI_MCBSP_WORD_20, | |
93 | DAVINCI_MCBSP_WORD_24, | |
94 | DAVINCI_MCBSP_WORD_32, | |
95 | }; | |
96 | ||
97 | static struct davinci_pcm_dma_params davinci_i2s_pcm_out = { | |
98 | .name = "I2S PCM Stereo out", | |
99 | }; | |
100 | ||
101 | static struct davinci_pcm_dma_params davinci_i2s_pcm_in = { | |
102 | .name = "I2S PCM Stereo in", | |
103 | }; | |
104 | ||
105 | struct davinci_mcbsp_dev { | |
106 | void __iomem *base; | |
c392bec7 | 107 | u32 pcr; |
310355c1 VB |
108 | struct clk *clk; |
109 | struct davinci_pcm_dma_params *dma_params[2]; | |
110 | }; | |
111 | ||
112 | static inline void davinci_mcbsp_write_reg(struct davinci_mcbsp_dev *dev, | |
113 | int reg, u32 val) | |
114 | { | |
115 | __raw_writel(val, dev->base + reg); | |
116 | } | |
117 | ||
118 | static inline u32 davinci_mcbsp_read_reg(struct davinci_mcbsp_dev *dev, int reg) | |
119 | { | |
120 | return __raw_readl(dev->base + reg); | |
121 | } | |
122 | ||
c392bec7 TK |
123 | static void toggle_clock(struct davinci_mcbsp_dev *dev, int playback) |
124 | { | |
125 | u32 m = playback ? DAVINCI_MCBSP_PCR_CLKXP : DAVINCI_MCBSP_PCR_CLKRP; | |
126 | /* The clock needs to toggle to complete reset. | |
127 | * So, fake it by toggling the clk polarity. | |
128 | */ | |
129 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, dev->pcr ^ m); | |
130 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, dev->pcr); | |
131 | } | |
132 | ||
f9af37cc TK |
133 | static void davinci_mcbsp_start(struct davinci_mcbsp_dev *dev, |
134 | struct snd_pcm_substream *substream) | |
310355c1 VB |
135 | { |
136 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
fb0ef645 | 137 | struct snd_soc_device *socdev = rtd->socdev; |
87689d56 | 138 | struct snd_soc_platform *platform = socdev->card->platform; |
c392bec7 | 139 | int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); |
35cf6358 | 140 | u32 spcr; |
c392bec7 | 141 | u32 mask = playback ? DAVINCI_MCBSP_SPCR_XRST : DAVINCI_MCBSP_SPCR_RRST; |
35cf6358 | 142 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
c392bec7 TK |
143 | if (spcr & mask) { |
144 | /* start off disabled */ | |
145 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, | |
146 | spcr & ~mask); | |
147 | toggle_clock(dev, playback); | |
148 | } | |
1bef4499 TK |
149 | if (dev->pcr & (DAVINCI_MCBSP_PCR_FSXM | DAVINCI_MCBSP_PCR_FSRM | |
150 | DAVINCI_MCBSP_PCR_CLKXM | DAVINCI_MCBSP_PCR_CLKRM)) { | |
151 | /* Start the sample generator */ | |
152 | spcr |= DAVINCI_MCBSP_SPCR_GRST; | |
153 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
154 | } | |
fb0ef645 | 155 | |
1bef4499 | 156 | if (playback) { |
fb0ef645 NM |
157 | /* Stop the DMA to avoid data loss */ |
158 | /* while the transmitter is out of reset to handle XSYNCERR */ | |
159 | if (platform->pcm_ops->trigger) { | |
eba575c3 | 160 | int ret = platform->pcm_ops->trigger(substream, |
fb0ef645 NM |
161 | SNDRV_PCM_TRIGGER_STOP); |
162 | if (ret < 0) | |
163 | printk(KERN_DEBUG "Playback DMA stop failed\n"); | |
164 | } | |
165 | ||
166 | /* Enable the transmitter */ | |
35cf6358 TK |
167 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
168 | spcr |= DAVINCI_MCBSP_SPCR_XRST; | |
169 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
fb0ef645 NM |
170 | |
171 | /* wait for any unexpected frame sync error to occur */ | |
172 | udelay(100); | |
173 | ||
174 | /* Disable the transmitter to clear any outstanding XSYNCERR */ | |
35cf6358 TK |
175 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
176 | spcr &= ~DAVINCI_MCBSP_SPCR_XRST; | |
177 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
c392bec7 | 178 | toggle_clock(dev, playback); |
fb0ef645 NM |
179 | |
180 | /* Restart the DMA */ | |
181 | if (platform->pcm_ops->trigger) { | |
eba575c3 | 182 | int ret = platform->pcm_ops->trigger(substream, |
fb0ef645 NM |
183 | SNDRV_PCM_TRIGGER_START); |
184 | if (ret < 0) | |
185 | printk(KERN_DEBUG "Playback DMA start failed\n"); | |
186 | } | |
fb0ef645 NM |
187 | } |
188 | ||
1bef4499 | 189 | /* Enable transmitter or receiver */ |
35cf6358 | 190 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
1bef4499 TK |
191 | spcr |= mask; |
192 | ||
193 | if (dev->pcr & (DAVINCI_MCBSP_PCR_FSXM | DAVINCI_MCBSP_PCR_FSRM)) { | |
194 | /* Start frame sync */ | |
195 | spcr |= DAVINCI_MCBSP_SPCR_FRST; | |
196 | } | |
35cf6358 | 197 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); |
310355c1 VB |
198 | } |
199 | ||
f9af37cc | 200 | static void davinci_mcbsp_stop(struct davinci_mcbsp_dev *dev, int playback) |
310355c1 | 201 | { |
35cf6358 | 202 | u32 spcr; |
310355c1 VB |
203 | |
204 | /* Reset transmitter/receiver and sample rate/frame sync generators */ | |
35cf6358 TK |
205 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
206 | spcr &= ~(DAVINCI_MCBSP_SPCR_GRST | DAVINCI_MCBSP_SPCR_FRST); | |
c392bec7 | 207 | spcr &= playback ? ~DAVINCI_MCBSP_SPCR_XRST : ~DAVINCI_MCBSP_SPCR_RRST; |
35cf6358 | 208 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); |
c392bec7 | 209 | toggle_clock(dev, playback); |
310355c1 VB |
210 | } |
211 | ||
dee89c4d | 212 | static int davinci_i2s_startup(struct snd_pcm_substream *substream, |
9333b594 | 213 | struct snd_soc_dai *cpu_dai) |
310355c1 | 214 | { |
9333b594 | 215 | struct davinci_mcbsp_dev *dev = cpu_dai->private_data; |
310355c1 | 216 | cpu_dai->dma_data = dev->dma_params[substream->stream]; |
310355c1 VB |
217 | return 0; |
218 | } | |
219 | ||
21903c1c TK |
220 | #define DEFAULT_BITPERSAMPLE 16 |
221 | ||
9cb132d7 | 222 | static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, |
310355c1 VB |
223 | unsigned int fmt) |
224 | { | |
225 | struct davinci_mcbsp_dev *dev = cpu_dai->private_data; | |
21903c1c TK |
226 | unsigned int pcr; |
227 | unsigned int srgr; | |
228 | unsigned int rcr; | |
229 | unsigned int xcr; | |
230 | srgr = DAVINCI_MCBSP_SRGR_FSGM | | |
231 | DAVINCI_MCBSP_SRGR_FPER(DEFAULT_BITPERSAMPLE * 2 - 1) | | |
232 | DAVINCI_MCBSP_SRGR_FWID(DEFAULT_BITPERSAMPLE - 1); | |
310355c1 VB |
233 | |
234 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
235 | case SND_SOC_DAIFMT_CBS_CFS: | |
21903c1c TK |
236 | /* cpu is master */ |
237 | pcr = DAVINCI_MCBSP_PCR_FSXM | | |
238 | DAVINCI_MCBSP_PCR_FSRM | | |
239 | DAVINCI_MCBSP_PCR_CLKXM | | |
240 | DAVINCI_MCBSP_PCR_CLKRM; | |
310355c1 | 241 | break; |
b402dff8 HV |
242 | case SND_SOC_DAIFMT_CBM_CFS: |
243 | /* McBSP CLKR pin is the input for the Sample Rate Generator. | |
244 | * McBSP FSR and FSX are driven by the Sample Rate Generator. */ | |
21903c1c TK |
245 | pcr = DAVINCI_MCBSP_PCR_SCLKME | |
246 | DAVINCI_MCBSP_PCR_FSXM | | |
247 | DAVINCI_MCBSP_PCR_FSRM; | |
b402dff8 | 248 | break; |
310355c1 | 249 | case SND_SOC_DAIFMT_CBM_CFM: |
21903c1c TK |
250 | /* codec is master */ |
251 | pcr = 0; | |
310355c1 VB |
252 | break; |
253 | default: | |
21903c1c | 254 | printk(KERN_ERR "%s:bad master\n", __func__); |
310355c1 VB |
255 | return -EINVAL; |
256 | } | |
257 | ||
69ab820c TK |
258 | rcr = DAVINCI_MCBSP_RCR_RFRLEN1(1); |
259 | xcr = DAVINCI_MCBSP_XCR_XFIG | DAVINCI_MCBSP_XCR_XFRLEN1(1); | |
260 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
07d8d9dc | 261 | case SND_SOC_DAIFMT_DSP_B: |
69ab820c TK |
262 | break; |
263 | case SND_SOC_DAIFMT_I2S: | |
07d8d9dc TK |
264 | /* Davinci doesn't support TRUE I2S, but some codecs will have |
265 | * the left and right channels contiguous. This allows | |
266 | * dsp_a mode to be used with an inverted normal frame clk. | |
267 | * If your codec is master and does not have contiguous | |
268 | * channels, then you will have sound on only one channel. | |
269 | * Try using a different mode, or codec as slave. | |
270 | * | |
271 | * The TLV320AIC33 is an example of a codec where this works. | |
272 | * It has a variable bit clock frequency allowing it to have | |
273 | * valid data on every bit clock. | |
274 | * | |
275 | * The TLV320AIC23 is an example of a codec where this does not | |
276 | * work. It has a fixed bit clock frequency with progressively | |
277 | * more empty bit clock slots between channels as the sample | |
278 | * rate is lowered. | |
279 | */ | |
280 | fmt ^= SND_SOC_DAIFMT_NB_IF; | |
281 | case SND_SOC_DAIFMT_DSP_A: | |
69ab820c TK |
282 | rcr |= DAVINCI_MCBSP_RCR_RDATDLY(1); |
283 | xcr |= DAVINCI_MCBSP_XCR_XDATDLY(1); | |
284 | break; | |
285 | default: | |
286 | printk(KERN_ERR "%s:bad format\n", __func__); | |
287 | return -EINVAL; | |
288 | } | |
289 | ||
310355c1 | 290 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
9e031624 | 291 | case SND_SOC_DAIFMT_NB_NF: |
664b4af8 TK |
292 | /* CLKRP Receive clock polarity, |
293 | * 1 - sampled on rising edge of CLKR | |
294 | * valid on rising edge | |
295 | * CLKXP Transmit clock polarity, | |
296 | * 1 - clocked on falling edge of CLKX | |
297 | * valid on rising edge | |
298 | * FSRP Receive frame sync pol, 0 - active high | |
299 | * FSXP Transmit frame sync pol, 0 - active high | |
300 | */ | |
21903c1c | 301 | pcr |= (DAVINCI_MCBSP_PCR_CLKXP | DAVINCI_MCBSP_PCR_CLKRP); |
310355c1 | 302 | break; |
9e031624 | 303 | case SND_SOC_DAIFMT_IB_IF: |
664b4af8 TK |
304 | /* CLKRP Receive clock polarity, |
305 | * 0 - sampled on falling edge of CLKR | |
306 | * valid on falling edge | |
307 | * CLKXP Transmit clock polarity, | |
308 | * 0 - clocked on rising edge of CLKX | |
309 | * valid on falling edge | |
310 | * FSRP Receive frame sync pol, 1 - active low | |
311 | * FSXP Transmit frame sync pol, 1 - active low | |
312 | */ | |
21903c1c | 313 | pcr |= (DAVINCI_MCBSP_PCR_FSXP | DAVINCI_MCBSP_PCR_FSRP); |
310355c1 | 314 | break; |
9e031624 | 315 | case SND_SOC_DAIFMT_NB_IF: |
664b4af8 TK |
316 | /* CLKRP Receive clock polarity, |
317 | * 1 - sampled on rising edge of CLKR | |
318 | * valid on rising edge | |
319 | * CLKXP Transmit clock polarity, | |
320 | * 1 - clocked on falling edge of CLKX | |
321 | * valid on rising edge | |
322 | * FSRP Receive frame sync pol, 1 - active low | |
323 | * FSXP Transmit frame sync pol, 1 - active low | |
324 | */ | |
21903c1c TK |
325 | pcr |= (DAVINCI_MCBSP_PCR_CLKXP | DAVINCI_MCBSP_PCR_CLKRP | |
326 | DAVINCI_MCBSP_PCR_FSXP | DAVINCI_MCBSP_PCR_FSRP); | |
310355c1 | 327 | break; |
9e031624 | 328 | case SND_SOC_DAIFMT_IB_NF: |
664b4af8 TK |
329 | /* CLKRP Receive clock polarity, |
330 | * 0 - sampled on falling edge of CLKR | |
331 | * valid on falling edge | |
332 | * CLKXP Transmit clock polarity, | |
333 | * 0 - clocked on rising edge of CLKX | |
334 | * valid on falling edge | |
335 | * FSRP Receive frame sync pol, 0 - active high | |
336 | * FSXP Transmit frame sync pol, 0 - active high | |
337 | */ | |
310355c1 VB |
338 | break; |
339 | default: | |
340 | return -EINVAL; | |
341 | } | |
21903c1c | 342 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, srgr); |
c392bec7 | 343 | dev->pcr = pcr; |
21903c1c TK |
344 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, pcr); |
345 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, rcr); | |
346 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, xcr); | |
310355c1 VB |
347 | return 0; |
348 | } | |
349 | ||
350 | static int davinci_i2s_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
351 | struct snd_pcm_hw_params *params, |
352 | struct snd_soc_dai *dai) | |
310355c1 VB |
353 | { |
354 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
355 | struct davinci_pcm_dma_params *dma_params = rtd->dai->cpu_dai->dma_data; | |
356 | struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data; | |
357 | struct snd_interval *i = NULL; | |
358 | int mcbsp_word_length; | |
35cf6358 TK |
359 | unsigned int rcr, xcr, srgr; |
360 | u32 spcr; | |
310355c1 VB |
361 | |
362 | /* general line settings */ | |
35cf6358 | 363 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
cb6e2063 | 364 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
35cf6358 TK |
365 | spcr |= DAVINCI_MCBSP_SPCR_RINTM(3) | DAVINCI_MCBSP_SPCR_FREE; |
366 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
cb6e2063 | 367 | } else { |
35cf6358 TK |
368 | spcr |= DAVINCI_MCBSP_SPCR_XINTM(3) | DAVINCI_MCBSP_SPCR_FREE; |
369 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
cb6e2063 | 370 | } |
310355c1 VB |
371 | |
372 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
35cf6358 TK |
373 | srgr = DAVINCI_MCBSP_SRGR_FSGM; |
374 | srgr |= DAVINCI_MCBSP_SRGR_FWID(snd_interval_value(i) - 1); | |
310355c1 VB |
375 | |
376 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_FRAME_BITS); | |
35cf6358 TK |
377 | srgr |= DAVINCI_MCBSP_SRGR_FPER(snd_interval_value(i) - 1); |
378 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, srgr); | |
310355c1 VB |
379 | |
380 | /* Determine xfer data type */ | |
381 | switch (params_format(params)) { | |
382 | case SNDRV_PCM_FORMAT_S8: | |
383 | dma_params->data_type = 1; | |
384 | mcbsp_word_length = DAVINCI_MCBSP_WORD_8; | |
385 | break; | |
386 | case SNDRV_PCM_FORMAT_S16_LE: | |
387 | dma_params->data_type = 2; | |
388 | mcbsp_word_length = DAVINCI_MCBSP_WORD_16; | |
389 | break; | |
390 | case SNDRV_PCM_FORMAT_S32_LE: | |
391 | dma_params->data_type = 4; | |
392 | mcbsp_word_length = DAVINCI_MCBSP_WORD_32; | |
393 | break; | |
394 | default: | |
9b6e12e4 | 395 | printk(KERN_WARNING "davinci-i2s: unsupported PCM format\n"); |
310355c1 VB |
396 | return -EINVAL; |
397 | } | |
398 | ||
cb6e2063 | 399 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
35cf6358 TK |
400 | rcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_RCR_REG); |
401 | rcr |= DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) | | |
402 | DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length); | |
403 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, rcr); | |
310355c1 | 404 | |
cb6e2063 | 405 | } else { |
35cf6358 TK |
406 | xcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_XCR_REG); |
407 | xcr |= DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) | | |
408 | DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length); | |
409 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, xcr); | |
310355c1 | 410 | |
cb6e2063 | 411 | } |
310355c1 VB |
412 | return 0; |
413 | } | |
414 | ||
dee89c4d MB |
415 | static int davinci_i2s_trigger(struct snd_pcm_substream *substream, int cmd, |
416 | struct snd_soc_dai *dai) | |
310355c1 | 417 | { |
f9af37cc TK |
418 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
419 | struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data; | |
310355c1 | 420 | int ret = 0; |
f9af37cc | 421 | int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); |
310355c1 VB |
422 | |
423 | switch (cmd) { | |
424 | case SNDRV_PCM_TRIGGER_START: | |
425 | case SNDRV_PCM_TRIGGER_RESUME: | |
426 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
f9af37cc | 427 | davinci_mcbsp_start(dev, substream); |
310355c1 VB |
428 | break; |
429 | case SNDRV_PCM_TRIGGER_STOP: | |
430 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
431 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
f9af37cc | 432 | davinci_mcbsp_stop(dev, playback); |
310355c1 VB |
433 | break; |
434 | default: | |
435 | ret = -EINVAL; | |
436 | } | |
437 | ||
438 | return ret; | |
439 | } | |
440 | ||
bdb92876 | 441 | static int davinci_i2s_probe(struct platform_device *pdev, |
9cb132d7 | 442 | struct snd_soc_dai *dai) |
310355c1 VB |
443 | { |
444 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
87506549 | 445 | struct snd_soc_card *card = socdev->card; |
a62114cb | 446 | struct snd_soc_dai *cpu_dai = card->dai_link->cpu_dai; |
310355c1 VB |
447 | struct davinci_mcbsp_dev *dev; |
448 | struct resource *mem, *ioarea; | |
449 | struct evm_snd_platform_data *pdata; | |
450 | int ret; | |
451 | ||
452 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
453 | if (!mem) { | |
454 | dev_err(&pdev->dev, "no mem resource?\n"); | |
455 | return -ENODEV; | |
456 | } | |
457 | ||
458 | ioarea = request_mem_region(mem->start, (mem->end - mem->start) + 1, | |
459 | pdev->name); | |
460 | if (!ioarea) { | |
461 | dev_err(&pdev->dev, "McBSP region already claimed\n"); | |
462 | return -EBUSY; | |
463 | } | |
464 | ||
465 | dev = kzalloc(sizeof(struct davinci_mcbsp_dev), GFP_KERNEL); | |
466 | if (!dev) { | |
467 | ret = -ENOMEM; | |
468 | goto err_release_region; | |
469 | } | |
470 | ||
471 | cpu_dai->private_data = dev; | |
472 | ||
a62114cb | 473 | dev->clk = clk_get(&pdev->dev, NULL); |
310355c1 VB |
474 | if (IS_ERR(dev->clk)) { |
475 | ret = -ENODEV; | |
476 | goto err_free_mem; | |
477 | } | |
478 | clk_enable(dev->clk); | |
479 | ||
480 | dev->base = (void __iomem *)IO_ADDRESS(mem->start); | |
481 | pdata = pdev->dev.platform_data; | |
482 | ||
483 | dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK] = &davinci_i2s_pcm_out; | |
484 | dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->channel = pdata->tx_dma_ch; | |
485 | dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->dma_addr = | |
486 | (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DXR_REG); | |
487 | ||
488 | dev->dma_params[SNDRV_PCM_STREAM_CAPTURE] = &davinci_i2s_pcm_in; | |
489 | dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->channel = pdata->rx_dma_ch; | |
490 | dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->dma_addr = | |
491 | (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DRR_REG); | |
492 | ||
493 | return 0; | |
494 | ||
495 | err_free_mem: | |
496 | kfree(dev); | |
497 | err_release_region: | |
498 | release_mem_region(mem->start, (mem->end - mem->start) + 1); | |
499 | ||
500 | return ret; | |
501 | } | |
502 | ||
bdb92876 | 503 | static void davinci_i2s_remove(struct platform_device *pdev, |
9cb132d7 | 504 | struct snd_soc_dai *dai) |
310355c1 VB |
505 | { |
506 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
87506549 | 507 | struct snd_soc_card *card = socdev->card; |
a62114cb | 508 | struct snd_soc_dai *cpu_dai = card->dai_link->cpu_dai; |
310355c1 VB |
509 | struct davinci_mcbsp_dev *dev = cpu_dai->private_data; |
510 | struct resource *mem; | |
511 | ||
512 | clk_disable(dev->clk); | |
513 | clk_put(dev->clk); | |
514 | dev->clk = NULL; | |
515 | ||
516 | kfree(dev); | |
517 | ||
518 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
519 | release_mem_region(mem->start, (mem->end - mem->start) + 1); | |
520 | } | |
521 | ||
522 | #define DAVINCI_I2S_RATES SNDRV_PCM_RATE_8000_96000 | |
523 | ||
6335d055 EM |
524 | static struct snd_soc_dai_ops davinci_i2s_dai_ops = { |
525 | .startup = davinci_i2s_startup, | |
526 | .trigger = davinci_i2s_trigger, | |
527 | .hw_params = davinci_i2s_hw_params, | |
528 | .set_fmt = davinci_i2s_set_dai_fmt, | |
529 | }; | |
530 | ||
9cb132d7 | 531 | struct snd_soc_dai davinci_i2s_dai = { |
310355c1 VB |
532 | .name = "davinci-i2s", |
533 | .id = 0, | |
310355c1 VB |
534 | .probe = davinci_i2s_probe, |
535 | .remove = davinci_i2s_remove, | |
536 | .playback = { | |
537 | .channels_min = 2, | |
538 | .channels_max = 2, | |
539 | .rates = DAVINCI_I2S_RATES, | |
540 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
541 | .capture = { | |
542 | .channels_min = 2, | |
543 | .channels_max = 2, | |
544 | .rates = DAVINCI_I2S_RATES, | |
545 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
6335d055 | 546 | .ops = &davinci_i2s_dai_ops, |
310355c1 VB |
547 | }; |
548 | EXPORT_SYMBOL_GPL(davinci_i2s_dai); | |
549 | ||
c9b3a40f | 550 | static int __init davinci_i2s_init(void) |
3f4b783c MB |
551 | { |
552 | return snd_soc_register_dai(&davinci_i2s_dai); | |
553 | } | |
554 | module_init(davinci_i2s_init); | |
555 | ||
556 | static void __exit davinci_i2s_exit(void) | |
557 | { | |
558 | snd_soc_unregister_dai(&davinci_i2s_dai); | |
559 | } | |
560 | module_exit(davinci_i2s_exit); | |
561 | ||
310355c1 VB |
562 | MODULE_AUTHOR("Vladimir Barinov"); |
563 | MODULE_DESCRIPTION("TI DAVINCI I2S (McBSP) SoC Interface"); | |
564 | MODULE_LICENSE("GPL"); |