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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> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
310355c1 VB |
16 | #include <linux/delay.h> |
17 | #include <linux/io.h> | |
18 | #include <linux/clk.h> | |
19 | ||
20 | #include <sound/core.h> | |
21 | #include <sound/pcm.h> | |
22 | #include <sound/pcm_params.h> | |
23 | #include <sound/initval.h> | |
24 | #include <sound/soc.h> | |
25 | ||
ff7d04b1 MB |
26 | #include <mach/asp.h> |
27 | ||
310355c1 | 28 | #include "davinci-pcm.h" |
a4c8ea2d | 29 | #include "davinci-i2s.h" |
310355c1 | 30 | |
a62114cb DB |
31 | |
32 | /* | |
33 | * NOTE: terminology here is confusing. | |
34 | * | |
35 | * - This driver supports the "Audio Serial Port" (ASP), | |
36 | * found on dm6446, dm355, and other DaVinci chips. | |
37 | * | |
38 | * - But it labels it a "Multi-channel Buffered Serial Port" | |
39 | * (McBSP) as on older chips like the dm642 ... which was | |
40 | * backward-compatible, possibly explaining that confusion. | |
41 | * | |
42 | * - OMAP chips have a controller called McBSP, which is | |
43 | * incompatible with the DaVinci flavor of McBSP. | |
44 | * | |
45 | * - Newer DaVinci chips have a controller called McASP, | |
46 | * incompatible with ASP and with either McBSP. | |
47 | * | |
48 | * In short: this uses ASP to implement I2S, not McBSP. | |
49 | * And it won't be the only DaVinci implemention of I2S. | |
50 | */ | |
310355c1 VB |
51 | #define DAVINCI_MCBSP_DRR_REG 0x00 |
52 | #define DAVINCI_MCBSP_DXR_REG 0x04 | |
53 | #define DAVINCI_MCBSP_SPCR_REG 0x08 | |
54 | #define DAVINCI_MCBSP_RCR_REG 0x0c | |
55 | #define DAVINCI_MCBSP_XCR_REG 0x10 | |
56 | #define DAVINCI_MCBSP_SRGR_REG 0x14 | |
57 | #define DAVINCI_MCBSP_PCR_REG 0x24 | |
58 | ||
59 | #define DAVINCI_MCBSP_SPCR_RRST (1 << 0) | |
60 | #define DAVINCI_MCBSP_SPCR_RINTM(v) ((v) << 4) | |
61 | #define DAVINCI_MCBSP_SPCR_XRST (1 << 16) | |
62 | #define DAVINCI_MCBSP_SPCR_XINTM(v) ((v) << 20) | |
63 | #define DAVINCI_MCBSP_SPCR_GRST (1 << 22) | |
64 | #define DAVINCI_MCBSP_SPCR_FRST (1 << 23) | |
65 | #define DAVINCI_MCBSP_SPCR_FREE (1 << 25) | |
66 | ||
67 | #define DAVINCI_MCBSP_RCR_RWDLEN1(v) ((v) << 5) | |
68 | #define DAVINCI_MCBSP_RCR_RFRLEN1(v) ((v) << 8) | |
69 | #define DAVINCI_MCBSP_RCR_RDATDLY(v) ((v) << 16) | |
f5cfa954 | 70 | #define DAVINCI_MCBSP_RCR_RFIG (1 << 18) |
310355c1 | 71 | #define DAVINCI_MCBSP_RCR_RWDLEN2(v) ((v) << 21) |
a4c8ea2d RR |
72 | #define DAVINCI_MCBSP_RCR_RFRLEN2(v) ((v) << 24) |
73 | #define DAVINCI_MCBSP_RCR_RPHASE BIT(31) | |
310355c1 VB |
74 | |
75 | #define DAVINCI_MCBSP_XCR_XWDLEN1(v) ((v) << 5) | |
76 | #define DAVINCI_MCBSP_XCR_XFRLEN1(v) ((v) << 8) | |
77 | #define DAVINCI_MCBSP_XCR_XDATDLY(v) ((v) << 16) | |
78 | #define DAVINCI_MCBSP_XCR_XFIG (1 << 18) | |
79 | #define DAVINCI_MCBSP_XCR_XWDLEN2(v) ((v) << 21) | |
a4c8ea2d RR |
80 | #define DAVINCI_MCBSP_XCR_XFRLEN2(v) ((v) << 24) |
81 | #define DAVINCI_MCBSP_XCR_XPHASE BIT(31) | |
310355c1 VB |
82 | |
83 | #define DAVINCI_MCBSP_SRGR_FWID(v) ((v) << 8) | |
84 | #define DAVINCI_MCBSP_SRGR_FPER(v) ((v) << 16) | |
85 | #define DAVINCI_MCBSP_SRGR_FSGM (1 << 28) | |
a4c8ea2d | 86 | #define DAVINCI_MCBSP_SRGR_CLKSM BIT(29) |
310355c1 VB |
87 | |
88 | #define DAVINCI_MCBSP_PCR_CLKRP (1 << 0) | |
89 | #define DAVINCI_MCBSP_PCR_CLKXP (1 << 1) | |
90 | #define DAVINCI_MCBSP_PCR_FSRP (1 << 2) | |
91 | #define DAVINCI_MCBSP_PCR_FSXP (1 << 3) | |
b402dff8 | 92 | #define DAVINCI_MCBSP_PCR_SCLKME (1 << 7) |
310355c1 VB |
93 | #define DAVINCI_MCBSP_PCR_CLKRM (1 << 8) |
94 | #define DAVINCI_MCBSP_PCR_CLKXM (1 << 9) | |
95 | #define DAVINCI_MCBSP_PCR_FSRM (1 << 10) | |
96 | #define DAVINCI_MCBSP_PCR_FSXM (1 << 11) | |
97 | ||
310355c1 VB |
98 | enum { |
99 | DAVINCI_MCBSP_WORD_8 = 0, | |
100 | DAVINCI_MCBSP_WORD_12, | |
101 | DAVINCI_MCBSP_WORD_16, | |
102 | DAVINCI_MCBSP_WORD_20, | |
103 | DAVINCI_MCBSP_WORD_24, | |
104 | DAVINCI_MCBSP_WORD_32, | |
105 | }; | |
106 | ||
0d6c9774 TK |
107 | static const unsigned char data_type[SNDRV_PCM_FORMAT_S32_LE + 1] = { |
108 | [SNDRV_PCM_FORMAT_S8] = 1, | |
109 | [SNDRV_PCM_FORMAT_S16_LE] = 2, | |
110 | [SNDRV_PCM_FORMAT_S32_LE] = 4, | |
111 | }; | |
112 | ||
113 | static const unsigned char asp_word_length[SNDRV_PCM_FORMAT_S32_LE + 1] = { | |
114 | [SNDRV_PCM_FORMAT_S8] = DAVINCI_MCBSP_WORD_8, | |
115 | [SNDRV_PCM_FORMAT_S16_LE] = DAVINCI_MCBSP_WORD_16, | |
116 | [SNDRV_PCM_FORMAT_S32_LE] = DAVINCI_MCBSP_WORD_32, | |
117 | }; | |
118 | ||
119 | static const unsigned char double_fmt[SNDRV_PCM_FORMAT_S32_LE + 1] = { | |
120 | [SNDRV_PCM_FORMAT_S8] = SNDRV_PCM_FORMAT_S16_LE, | |
121 | [SNDRV_PCM_FORMAT_S16_LE] = SNDRV_PCM_FORMAT_S32_LE, | |
122 | }; | |
123 | ||
310355c1 | 124 | struct davinci_mcbsp_dev { |
ec637553 | 125 | struct device *dev; |
92e2a6f6 | 126 | struct davinci_pcm_dma_params dma_params[2]; |
310355c1 | 127 | void __iomem *base; |
f5cfa954 TK |
128 | #define MOD_DSP_A 0 |
129 | #define MOD_DSP_B 1 | |
130 | int mode; | |
c392bec7 | 131 | u32 pcr; |
310355c1 | 132 | struct clk *clk; |
0d6c9774 TK |
133 | /* |
134 | * Combining both channels into 1 element will at least double the | |
135 | * amount of time between servicing the dma channel, increase | |
136 | * effiency, and reduce the chance of overrun/underrun. But, | |
137 | * it will result in the left & right channels being swapped. | |
138 | * | |
139 | * If relabeling the left and right channels is not possible, | |
140 | * you may want to let the codec know to swap them back. | |
141 | * | |
142 | * It may allow x10 the amount of time to service dma requests, | |
143 | * if the codec is master and is using an unnecessarily fast bit clock | |
144 | * (ie. tlvaic23b), independent of the sample rate. So, having an | |
145 | * entire frame at once means it can be serviced at the sample rate | |
146 | * instead of the bit clock rate. | |
147 | * | |
148 | * In the now unlikely case that an underrun still | |
149 | * occurs, both the left and right samples will be repeated | |
150 | * so that no pops are heard, and the left and right channels | |
151 | * won't end up being swapped because of the underrun. | |
152 | */ | |
153 | unsigned enable_channel_combine:1; | |
a4c8ea2d RR |
154 | |
155 | unsigned int fmt; | |
156 | int clk_div; | |
ec637553 | 157 | int clk_input_pin; |
d9823ed9 | 158 | bool i2s_accurate_sck; |
310355c1 VB |
159 | }; |
160 | ||
161 | static inline void davinci_mcbsp_write_reg(struct davinci_mcbsp_dev *dev, | |
162 | int reg, u32 val) | |
163 | { | |
164 | __raw_writel(val, dev->base + reg); | |
165 | } | |
166 | ||
167 | static inline u32 davinci_mcbsp_read_reg(struct davinci_mcbsp_dev *dev, int reg) | |
168 | { | |
169 | return __raw_readl(dev->base + reg); | |
170 | } | |
171 | ||
c392bec7 TK |
172 | static void toggle_clock(struct davinci_mcbsp_dev *dev, int playback) |
173 | { | |
174 | u32 m = playback ? DAVINCI_MCBSP_PCR_CLKXP : DAVINCI_MCBSP_PCR_CLKRP; | |
175 | /* The clock needs to toggle to complete reset. | |
176 | * So, fake it by toggling the clk polarity. | |
177 | */ | |
178 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, dev->pcr ^ m); | |
179 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, dev->pcr); | |
180 | } | |
181 | ||
f9af37cc TK |
182 | static void davinci_mcbsp_start(struct davinci_mcbsp_dev *dev, |
183 | struct snd_pcm_substream *substream) | |
310355c1 VB |
184 | { |
185 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
fb0ef645 | 186 | struct snd_soc_device *socdev = rtd->socdev; |
87689d56 | 187 | struct snd_soc_platform *platform = socdev->card->platform; |
c392bec7 | 188 | int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); |
35cf6358 | 189 | u32 spcr; |
c392bec7 | 190 | u32 mask = playback ? DAVINCI_MCBSP_SPCR_XRST : DAVINCI_MCBSP_SPCR_RRST; |
35cf6358 | 191 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
c392bec7 TK |
192 | if (spcr & mask) { |
193 | /* start off disabled */ | |
194 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, | |
195 | spcr & ~mask); | |
196 | toggle_clock(dev, playback); | |
197 | } | |
1bef4499 TK |
198 | if (dev->pcr & (DAVINCI_MCBSP_PCR_FSXM | DAVINCI_MCBSP_PCR_FSRM | |
199 | DAVINCI_MCBSP_PCR_CLKXM | DAVINCI_MCBSP_PCR_CLKRM)) { | |
200 | /* Start the sample generator */ | |
201 | spcr |= DAVINCI_MCBSP_SPCR_GRST; | |
202 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
203 | } | |
fb0ef645 | 204 | |
1bef4499 | 205 | if (playback) { |
fb0ef645 NM |
206 | /* Stop the DMA to avoid data loss */ |
207 | /* while the transmitter is out of reset to handle XSYNCERR */ | |
208 | if (platform->pcm_ops->trigger) { | |
eba575c3 | 209 | int ret = platform->pcm_ops->trigger(substream, |
fb0ef645 NM |
210 | SNDRV_PCM_TRIGGER_STOP); |
211 | if (ret < 0) | |
212 | printk(KERN_DEBUG "Playback DMA stop failed\n"); | |
213 | } | |
214 | ||
215 | /* Enable the transmitter */ | |
35cf6358 TK |
216 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
217 | spcr |= DAVINCI_MCBSP_SPCR_XRST; | |
218 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
fb0ef645 NM |
219 | |
220 | /* wait for any unexpected frame sync error to occur */ | |
221 | udelay(100); | |
222 | ||
223 | /* Disable the transmitter to clear any outstanding XSYNCERR */ | |
35cf6358 TK |
224 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
225 | spcr &= ~DAVINCI_MCBSP_SPCR_XRST; | |
226 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
c392bec7 | 227 | toggle_clock(dev, playback); |
fb0ef645 NM |
228 | |
229 | /* Restart the DMA */ | |
230 | if (platform->pcm_ops->trigger) { | |
eba575c3 | 231 | int ret = platform->pcm_ops->trigger(substream, |
fb0ef645 NM |
232 | SNDRV_PCM_TRIGGER_START); |
233 | if (ret < 0) | |
234 | printk(KERN_DEBUG "Playback DMA start failed\n"); | |
235 | } | |
fb0ef645 NM |
236 | } |
237 | ||
1bef4499 | 238 | /* Enable transmitter or receiver */ |
35cf6358 | 239 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
1bef4499 TK |
240 | spcr |= mask; |
241 | ||
242 | if (dev->pcr & (DAVINCI_MCBSP_PCR_FSXM | DAVINCI_MCBSP_PCR_FSRM)) { | |
243 | /* Start frame sync */ | |
244 | spcr |= DAVINCI_MCBSP_SPCR_FRST; | |
245 | } | |
35cf6358 | 246 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); |
310355c1 VB |
247 | } |
248 | ||
f9af37cc | 249 | static void davinci_mcbsp_stop(struct davinci_mcbsp_dev *dev, int playback) |
310355c1 | 250 | { |
35cf6358 | 251 | u32 spcr; |
310355c1 VB |
252 | |
253 | /* Reset transmitter/receiver and sample rate/frame sync generators */ | |
35cf6358 TK |
254 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
255 | spcr &= ~(DAVINCI_MCBSP_SPCR_GRST | DAVINCI_MCBSP_SPCR_FRST); | |
c392bec7 | 256 | spcr &= playback ? ~DAVINCI_MCBSP_SPCR_XRST : ~DAVINCI_MCBSP_SPCR_RRST; |
35cf6358 | 257 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); |
c392bec7 | 258 | toggle_clock(dev, playback); |
310355c1 VB |
259 | } |
260 | ||
21903c1c TK |
261 | #define DEFAULT_BITPERSAMPLE 16 |
262 | ||
9cb132d7 | 263 | static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, |
310355c1 VB |
264 | unsigned int fmt) |
265 | { | |
266 | struct davinci_mcbsp_dev *dev = cpu_dai->private_data; | |
21903c1c TK |
267 | unsigned int pcr; |
268 | unsigned int srgr; | |
a4c8ea2d | 269 | /* Attention srgr is updated by hw_params! */ |
21903c1c TK |
270 | srgr = DAVINCI_MCBSP_SRGR_FSGM | |
271 | DAVINCI_MCBSP_SRGR_FPER(DEFAULT_BITPERSAMPLE * 2 - 1) | | |
272 | DAVINCI_MCBSP_SRGR_FWID(DEFAULT_BITPERSAMPLE - 1); | |
310355c1 | 273 | |
a4c8ea2d | 274 | dev->fmt = fmt; |
f5cfa954 | 275 | /* set master/slave audio interface */ |
310355c1 VB |
276 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
277 | case SND_SOC_DAIFMT_CBS_CFS: | |
21903c1c TK |
278 | /* cpu is master */ |
279 | pcr = DAVINCI_MCBSP_PCR_FSXM | | |
280 | DAVINCI_MCBSP_PCR_FSRM | | |
281 | DAVINCI_MCBSP_PCR_CLKXM | | |
282 | DAVINCI_MCBSP_PCR_CLKRM; | |
310355c1 | 283 | break; |
b402dff8 | 284 | case SND_SOC_DAIFMT_CBM_CFS: |
ec637553 RR |
285 | pcr = DAVINCI_MCBSP_PCR_FSRM | DAVINCI_MCBSP_PCR_FSXM; |
286 | /* | |
287 | * Selection of the clock input pin that is the | |
288 | * input for the Sample Rate Generator. | |
289 | * McBSP FSR and FSX are driven by the Sample Rate | |
290 | * Generator. | |
291 | */ | |
292 | switch (dev->clk_input_pin) { | |
293 | case MCBSP_CLKS: | |
294 | pcr |= DAVINCI_MCBSP_PCR_CLKXM | | |
295 | DAVINCI_MCBSP_PCR_CLKRM; | |
296 | break; | |
297 | case MCBSP_CLKR: | |
298 | pcr |= DAVINCI_MCBSP_PCR_SCLKME; | |
299 | break; | |
300 | default: | |
301 | dev_err(dev->dev, "bad clk_input_pin\n"); | |
302 | return -EINVAL; | |
303 | } | |
304 | ||
b402dff8 | 305 | break; |
310355c1 | 306 | case SND_SOC_DAIFMT_CBM_CFM: |
21903c1c TK |
307 | /* codec is master */ |
308 | pcr = 0; | |
310355c1 VB |
309 | break; |
310 | default: | |
21903c1c | 311 | printk(KERN_ERR "%s:bad master\n", __func__); |
310355c1 VB |
312 | return -EINVAL; |
313 | } | |
314 | ||
f5cfa954 | 315 | /* interface format */ |
69ab820c | 316 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
69ab820c | 317 | case SND_SOC_DAIFMT_I2S: |
07d8d9dc TK |
318 | /* Davinci doesn't support TRUE I2S, but some codecs will have |
319 | * the left and right channels contiguous. This allows | |
320 | * dsp_a mode to be used with an inverted normal frame clk. | |
321 | * If your codec is master and does not have contiguous | |
322 | * channels, then you will have sound on only one channel. | |
323 | * Try using a different mode, or codec as slave. | |
324 | * | |
325 | * The TLV320AIC33 is an example of a codec where this works. | |
326 | * It has a variable bit clock frequency allowing it to have | |
327 | * valid data on every bit clock. | |
328 | * | |
329 | * The TLV320AIC23 is an example of a codec where this does not | |
330 | * work. It has a fixed bit clock frequency with progressively | |
331 | * more empty bit clock slots between channels as the sample | |
332 | * rate is lowered. | |
333 | */ | |
334 | fmt ^= SND_SOC_DAIFMT_NB_IF; | |
335 | case SND_SOC_DAIFMT_DSP_A: | |
f5cfa954 TK |
336 | dev->mode = MOD_DSP_A; |
337 | break; | |
338 | case SND_SOC_DAIFMT_DSP_B: | |
339 | dev->mode = MOD_DSP_B; | |
69ab820c TK |
340 | break; |
341 | default: | |
342 | printk(KERN_ERR "%s:bad format\n", __func__); | |
343 | return -EINVAL; | |
344 | } | |
345 | ||
310355c1 | 346 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
9e031624 | 347 | case SND_SOC_DAIFMT_NB_NF: |
664b4af8 TK |
348 | /* CLKRP Receive clock polarity, |
349 | * 1 - sampled on rising edge of CLKR | |
350 | * valid on rising edge | |
351 | * CLKXP Transmit clock polarity, | |
352 | * 1 - clocked on falling edge of CLKX | |
353 | * valid on rising edge | |
354 | * FSRP Receive frame sync pol, 0 - active high | |
355 | * FSXP Transmit frame sync pol, 0 - active high | |
356 | */ | |
21903c1c | 357 | pcr |= (DAVINCI_MCBSP_PCR_CLKXP | DAVINCI_MCBSP_PCR_CLKRP); |
310355c1 | 358 | break; |
9e031624 | 359 | case SND_SOC_DAIFMT_IB_IF: |
664b4af8 TK |
360 | /* CLKRP Receive clock polarity, |
361 | * 0 - sampled on falling edge of CLKR | |
362 | * valid on falling edge | |
363 | * CLKXP Transmit clock polarity, | |
364 | * 0 - clocked on rising edge of CLKX | |
365 | * valid on falling edge | |
366 | * FSRP Receive frame sync pol, 1 - active low | |
367 | * FSXP Transmit frame sync pol, 1 - active low | |
368 | */ | |
21903c1c | 369 | pcr |= (DAVINCI_MCBSP_PCR_FSXP | DAVINCI_MCBSP_PCR_FSRP); |
310355c1 | 370 | break; |
9e031624 | 371 | case SND_SOC_DAIFMT_NB_IF: |
664b4af8 TK |
372 | /* CLKRP Receive clock polarity, |
373 | * 1 - sampled on rising edge of CLKR | |
374 | * valid on rising edge | |
375 | * CLKXP Transmit clock polarity, | |
376 | * 1 - clocked on falling edge of CLKX | |
377 | * valid on rising edge | |
378 | * FSRP Receive frame sync pol, 1 - active low | |
379 | * FSXP Transmit frame sync pol, 1 - active low | |
380 | */ | |
21903c1c TK |
381 | pcr |= (DAVINCI_MCBSP_PCR_CLKXP | DAVINCI_MCBSP_PCR_CLKRP | |
382 | DAVINCI_MCBSP_PCR_FSXP | DAVINCI_MCBSP_PCR_FSRP); | |
310355c1 | 383 | break; |
9e031624 | 384 | case SND_SOC_DAIFMT_IB_NF: |
664b4af8 TK |
385 | /* CLKRP Receive clock polarity, |
386 | * 0 - sampled on falling edge of CLKR | |
387 | * valid on falling edge | |
388 | * CLKXP Transmit clock polarity, | |
389 | * 0 - clocked on rising edge of CLKX | |
390 | * valid on falling edge | |
391 | * FSRP Receive frame sync pol, 0 - active high | |
392 | * FSXP Transmit frame sync pol, 0 - active high | |
393 | */ | |
310355c1 VB |
394 | break; |
395 | default: | |
396 | return -EINVAL; | |
397 | } | |
21903c1c | 398 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, srgr); |
c392bec7 | 399 | dev->pcr = pcr; |
21903c1c | 400 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, pcr); |
310355c1 VB |
401 | return 0; |
402 | } | |
403 | ||
a4c8ea2d RR |
404 | static int davinci_i2s_dai_set_clkdiv(struct snd_soc_dai *cpu_dai, |
405 | int div_id, int div) | |
406 | { | |
407 | struct davinci_mcbsp_dev *dev = cpu_dai->private_data; | |
408 | ||
409 | if (div_id != DAVINCI_MCBSP_CLKGDV) | |
410 | return -ENODEV; | |
411 | ||
412 | dev->clk_div = div; | |
413 | return 0; | |
414 | } | |
415 | ||
310355c1 | 416 | static int davinci_i2s_hw_params(struct snd_pcm_substream *substream, |
dee89c4d MB |
417 | struct snd_pcm_hw_params *params, |
418 | struct snd_soc_dai *dai) | |
310355c1 | 419 | { |
9bb74150 | 420 | struct davinci_mcbsp_dev *dev = dai->private_data; |
81ac55aa | 421 | struct davinci_pcm_dma_params *dma_params = |
92e2a6f6 | 422 | &dev->dma_params[substream->stream]; |
310355c1 | 423 | struct snd_interval *i = NULL; |
a4c8ea2d RR |
424 | int mcbsp_word_length, master; |
425 | unsigned int rcr, xcr, srgr, clk_div, freq, framesize; | |
35cf6358 | 426 | u32 spcr; |
0d6c9774 TK |
427 | snd_pcm_format_t fmt; |
428 | unsigned element_cnt = 1; | |
310355c1 VB |
429 | |
430 | /* general line settings */ | |
35cf6358 | 431 | spcr = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG); |
cb6e2063 | 432 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
35cf6358 TK |
433 | spcr |= DAVINCI_MCBSP_SPCR_RINTM(3) | DAVINCI_MCBSP_SPCR_FREE; |
434 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
cb6e2063 | 435 | } else { |
35cf6358 TK |
436 | spcr |= DAVINCI_MCBSP_SPCR_XINTM(3) | DAVINCI_MCBSP_SPCR_FREE; |
437 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, spcr); | |
cb6e2063 | 438 | } |
310355c1 | 439 | |
a4c8ea2d RR |
440 | master = dev->fmt & SND_SOC_DAIFMT_MASTER_MASK; |
441 | fmt = params_format(params); | |
442 | mcbsp_word_length = asp_word_length[fmt]; | |
310355c1 | 443 | |
a4c8ea2d RR |
444 | switch (master) { |
445 | case SND_SOC_DAIFMT_CBS_CFS: | |
446 | freq = clk_get_rate(dev->clk); | |
447 | srgr = DAVINCI_MCBSP_SRGR_FSGM | | |
448 | DAVINCI_MCBSP_SRGR_CLKSM; | |
449 | srgr |= DAVINCI_MCBSP_SRGR_FWID(mcbsp_word_length * | |
450 | 8 - 1); | |
d9823ed9 RR |
451 | if (dev->i2s_accurate_sck) { |
452 | clk_div = 256; | |
453 | do { | |
454 | framesize = (freq / (--clk_div)) / | |
455 | params->rate_num * | |
456 | params->rate_den; | |
457 | } while (((framesize < 33) || (framesize > 4095)) && | |
458 | (clk_div)); | |
459 | clk_div--; | |
460 | srgr |= DAVINCI_MCBSP_SRGR_FPER(framesize - 1); | |
461 | } else { | |
462 | /* symmetric waveforms */ | |
463 | clk_div = freq / (mcbsp_word_length * 16) / | |
464 | params->rate_num * params->rate_den; | |
465 | srgr |= DAVINCI_MCBSP_SRGR_FPER(mcbsp_word_length * | |
466 | 16 - 1); | |
467 | } | |
a4c8ea2d RR |
468 | clk_div &= 0xFF; |
469 | srgr |= clk_div; | |
470 | break; | |
471 | case SND_SOC_DAIFMT_CBM_CFS: | |
472 | srgr = DAVINCI_MCBSP_SRGR_FSGM; | |
473 | clk_div = dev->clk_div - 1; | |
474 | srgr |= DAVINCI_MCBSP_SRGR_FWID(mcbsp_word_length * 8 - 1); | |
475 | srgr |= DAVINCI_MCBSP_SRGR_FPER(mcbsp_word_length * 16 - 1); | |
476 | clk_div &= 0xFF; | |
477 | srgr |= clk_div; | |
478 | break; | |
479 | case SND_SOC_DAIFMT_CBM_CFM: | |
480 | /* Clock and frame sync given from external sources */ | |
481 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
482 | srgr = DAVINCI_MCBSP_SRGR_FSGM; | |
483 | srgr |= DAVINCI_MCBSP_SRGR_FWID(snd_interval_value(i) - 1); | |
484 | pr_debug("%s - %d FWID set: re-read srgr = %X\n", | |
485 | __func__, __LINE__, snd_interval_value(i) - 1); | |
486 | ||
487 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_FRAME_BITS); | |
488 | srgr |= DAVINCI_MCBSP_SRGR_FPER(snd_interval_value(i) - 1); | |
489 | break; | |
490 | default: | |
491 | return -EINVAL; | |
492 | } | |
35cf6358 | 493 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, srgr); |
310355c1 | 494 | |
f5cfa954 TK |
495 | rcr = DAVINCI_MCBSP_RCR_RFIG; |
496 | xcr = DAVINCI_MCBSP_XCR_XFIG; | |
497 | if (dev->mode == MOD_DSP_B) { | |
498 | rcr |= DAVINCI_MCBSP_RCR_RDATDLY(0); | |
499 | xcr |= DAVINCI_MCBSP_XCR_XDATDLY(0); | |
500 | } else { | |
501 | rcr |= DAVINCI_MCBSP_RCR_RDATDLY(1); | |
502 | xcr |= DAVINCI_MCBSP_XCR_XDATDLY(1); | |
503 | } | |
310355c1 | 504 | /* Determine xfer data type */ |
0d6c9774 TK |
505 | fmt = params_format(params); |
506 | if ((fmt > SNDRV_PCM_FORMAT_S32_LE) || !data_type[fmt]) { | |
9b6e12e4 | 507 | printk(KERN_WARNING "davinci-i2s: unsupported PCM format\n"); |
310355c1 VB |
508 | return -EINVAL; |
509 | } | |
510 | ||
0d6c9774 TK |
511 | if (params_channels(params) == 2) { |
512 | element_cnt = 2; | |
513 | if (double_fmt[fmt] && dev->enable_channel_combine) { | |
514 | element_cnt = 1; | |
515 | fmt = double_fmt[fmt]; | |
516 | } | |
a4c8ea2d RR |
517 | switch (master) { |
518 | case SND_SOC_DAIFMT_CBS_CFS: | |
519 | case SND_SOC_DAIFMT_CBS_CFM: | |
520 | rcr |= DAVINCI_MCBSP_RCR_RFRLEN2(0); | |
521 | xcr |= DAVINCI_MCBSP_XCR_XFRLEN2(0); | |
522 | rcr |= DAVINCI_MCBSP_RCR_RPHASE; | |
523 | xcr |= DAVINCI_MCBSP_XCR_XPHASE; | |
524 | break; | |
525 | case SND_SOC_DAIFMT_CBM_CFM: | |
526 | case SND_SOC_DAIFMT_CBM_CFS: | |
527 | rcr |= DAVINCI_MCBSP_RCR_RFRLEN2(element_cnt - 1); | |
528 | xcr |= DAVINCI_MCBSP_XCR_XFRLEN2(element_cnt - 1); | |
529 | break; | |
530 | default: | |
531 | return -EINVAL; | |
532 | } | |
0d6c9774 TK |
533 | } |
534 | dma_params->acnt = dma_params->data_type = data_type[fmt]; | |
4fa9c1a5 | 535 | dma_params->fifo_level = 0; |
0d6c9774 | 536 | mcbsp_word_length = asp_word_length[fmt]; |
a4c8ea2d RR |
537 | |
538 | switch (master) { | |
539 | case SND_SOC_DAIFMT_CBS_CFS: | |
540 | case SND_SOC_DAIFMT_CBS_CFM: | |
541 | rcr |= DAVINCI_MCBSP_RCR_RFRLEN1(0); | |
542 | xcr |= DAVINCI_MCBSP_XCR_XFRLEN1(0); | |
543 | break; | |
544 | case SND_SOC_DAIFMT_CBM_CFM: | |
545 | case SND_SOC_DAIFMT_CBM_CFS: | |
546 | rcr |= DAVINCI_MCBSP_RCR_RFRLEN1(element_cnt - 1); | |
547 | xcr |= DAVINCI_MCBSP_XCR_XFRLEN1(element_cnt - 1); | |
548 | break; | |
549 | default: | |
550 | return -EINVAL; | |
551 | } | |
310355c1 | 552 | |
f5cfa954 TK |
553 | rcr |= DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) | |
554 | DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length); | |
555 | xcr |= DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) | | |
556 | DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length); | |
310355c1 | 557 | |
f5cfa954 TK |
558 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
559 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, xcr); | |
560 | else | |
561 | davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, rcr); | |
a4c8ea2d RR |
562 | |
563 | pr_debug("%s - %d srgr=%X\n", __func__, __LINE__, srgr); | |
564 | pr_debug("%s - %d xcr=%X\n", __func__, __LINE__, xcr); | |
565 | pr_debug("%s - %d rcr=%X\n", __func__, __LINE__, rcr); | |
310355c1 VB |
566 | return 0; |
567 | } | |
568 | ||
af0adf3e TK |
569 | static int davinci_i2s_prepare(struct snd_pcm_substream *substream, |
570 | struct snd_soc_dai *dai) | |
571 | { | |
9bb74150 | 572 | struct davinci_mcbsp_dev *dev = dai->private_data; |
af0adf3e TK |
573 | int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); |
574 | davinci_mcbsp_stop(dev, playback); | |
575 | if ((dev->pcr & DAVINCI_MCBSP_PCR_FSXM) == 0) { | |
576 | /* codec is master */ | |
577 | davinci_mcbsp_start(dev, substream); | |
578 | } | |
579 | return 0; | |
580 | } | |
581 | ||
dee89c4d MB |
582 | static int davinci_i2s_trigger(struct snd_pcm_substream *substream, int cmd, |
583 | struct snd_soc_dai *dai) | |
310355c1 | 584 | { |
9bb74150 | 585 | struct davinci_mcbsp_dev *dev = dai->private_data; |
310355c1 | 586 | int ret = 0; |
f9af37cc | 587 | int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); |
af0adf3e TK |
588 | if ((dev->pcr & DAVINCI_MCBSP_PCR_FSXM) == 0) |
589 | return 0; /* return if codec is master */ | |
310355c1 VB |
590 | |
591 | switch (cmd) { | |
592 | case SNDRV_PCM_TRIGGER_START: | |
593 | case SNDRV_PCM_TRIGGER_RESUME: | |
594 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
f9af37cc | 595 | davinci_mcbsp_start(dev, substream); |
310355c1 VB |
596 | break; |
597 | case SNDRV_PCM_TRIGGER_STOP: | |
598 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
599 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
f9af37cc | 600 | davinci_mcbsp_stop(dev, playback); |
310355c1 VB |
601 | break; |
602 | default: | |
603 | ret = -EINVAL; | |
604 | } | |
310355c1 VB |
605 | return ret; |
606 | } | |
607 | ||
af0adf3e TK |
608 | static void davinci_i2s_shutdown(struct snd_pcm_substream *substream, |
609 | struct snd_soc_dai *dai) | |
610 | { | |
9bb74150 | 611 | struct davinci_mcbsp_dev *dev = dai->private_data; |
af0adf3e TK |
612 | int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); |
613 | davinci_mcbsp_stop(dev, playback); | |
614 | } | |
615 | ||
5204d496 C |
616 | #define DAVINCI_I2S_RATES SNDRV_PCM_RATE_8000_96000 |
617 | ||
618 | static struct snd_soc_dai_ops davinci_i2s_dai_ops = { | |
3f405b46 MB |
619 | .shutdown = davinci_i2s_shutdown, |
620 | .prepare = davinci_i2s_prepare, | |
5204d496 C |
621 | .trigger = davinci_i2s_trigger, |
622 | .hw_params = davinci_i2s_hw_params, | |
623 | .set_fmt = davinci_i2s_set_dai_fmt, | |
a4c8ea2d | 624 | .set_clkdiv = davinci_i2s_dai_set_clkdiv, |
5204d496 C |
625 | |
626 | }; | |
627 | ||
628 | struct snd_soc_dai davinci_i2s_dai = { | |
629 | .name = "davinci-i2s", | |
630 | .id = 0, | |
631 | .playback = { | |
632 | .channels_min = 2, | |
633 | .channels_max = 2, | |
634 | .rates = DAVINCI_I2S_RATES, | |
635 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
636 | .capture = { | |
637 | .channels_min = 2, | |
638 | .channels_max = 2, | |
639 | .rates = DAVINCI_I2S_RATES, | |
640 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
641 | .ops = &davinci_i2s_dai_ops, | |
642 | ||
643 | }; | |
644 | EXPORT_SYMBOL_GPL(davinci_i2s_dai); | |
645 | ||
646 | static int davinci_i2s_probe(struct platform_device *pdev) | |
310355c1 | 647 | { |
5204d496 | 648 | struct snd_platform_data *pdata = pdev->dev.platform_data; |
310355c1 | 649 | struct davinci_mcbsp_dev *dev; |
5204d496 | 650 | struct resource *mem, *ioarea, *res; |
48519f0a SN |
651 | enum dma_event_q asp_chan_q = EVENTQ_0; |
652 | enum dma_event_q ram_chan_q = EVENTQ_1; | |
310355c1 VB |
653 | int ret; |
654 | ||
655 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
656 | if (!mem) { | |
657 | dev_err(&pdev->dev, "no mem resource?\n"); | |
658 | return -ENODEV; | |
659 | } | |
660 | ||
661 | ioarea = request_mem_region(mem->start, (mem->end - mem->start) + 1, | |
662 | pdev->name); | |
663 | if (!ioarea) { | |
664 | dev_err(&pdev->dev, "McBSP region already claimed\n"); | |
665 | return -EBUSY; | |
666 | } | |
667 | ||
668 | dev = kzalloc(sizeof(struct davinci_mcbsp_dev), GFP_KERNEL); | |
669 | if (!dev) { | |
670 | ret = -ENOMEM; | |
671 | goto err_release_region; | |
672 | } | |
1e224f32 | 673 | if (pdata) { |
0d6c9774 | 674 | dev->enable_channel_combine = pdata->enable_channel_combine; |
1e224f32 TK |
675 | dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].sram_size = |
676 | pdata->sram_size_playback; | |
677 | dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].sram_size = | |
678 | pdata->sram_size_capture; | |
ec637553 | 679 | dev->clk_input_pin = pdata->clk_input_pin; |
d9823ed9 | 680 | dev->i2s_accurate_sck = pdata->i2s_accurate_sck; |
48519f0a SN |
681 | asp_chan_q = pdata->asp_chan_q; |
682 | ram_chan_q = pdata->ram_chan_q; | |
1e224f32 | 683 | } |
48519f0a SN |
684 | |
685 | dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].asp_chan_q = asp_chan_q; | |
686 | dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].ram_chan_q = ram_chan_q; | |
687 | dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].asp_chan_q = asp_chan_q; | |
688 | dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].ram_chan_q = ram_chan_q; | |
689 | ||
3e46a447 | 690 | dev->clk = clk_get(&pdev->dev, NULL); |
310355c1 VB |
691 | if (IS_ERR(dev->clk)) { |
692 | ret = -ENODEV; | |
693 | goto err_free_mem; | |
694 | } | |
695 | clk_enable(dev->clk); | |
696 | ||
697 | dev->base = (void __iomem *)IO_ADDRESS(mem->start); | |
310355c1 | 698 | |
92e2a6f6 | 699 | dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].dma_addr = |
310355c1 VB |
700 | (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DXR_REG); |
701 | ||
92e2a6f6 | 702 | dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].dma_addr = |
310355c1 VB |
703 | (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DRR_REG); |
704 | ||
5204d496 C |
705 | /* first TX, then RX */ |
706 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
707 | if (!res) { | |
708 | dev_err(&pdev->dev, "no DMA resource\n"); | |
efd13be0 | 709 | ret = -ENXIO; |
5204d496 C |
710 | goto err_free_mem; |
711 | } | |
92e2a6f6 | 712 | dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].channel = res->start; |
5204d496 C |
713 | |
714 | res = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
715 | if (!res) { | |
716 | dev_err(&pdev->dev, "no DMA resource\n"); | |
efd13be0 | 717 | ret = -ENXIO; |
5204d496 C |
718 | goto err_free_mem; |
719 | } | |
92e2a6f6 | 720 | dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel = res->start; |
ec637553 | 721 | dev->dev = &pdev->dev; |
5204d496 C |
722 | |
723 | davinci_i2s_dai.private_data = dev; | |
5f712b2b DM |
724 | davinci_i2s_dai.capture.dma_data = dev->dma_params; |
725 | davinci_i2s_dai.playback.dma_data = dev->dma_params; | |
5204d496 C |
726 | ret = snd_soc_register_dai(&davinci_i2s_dai); |
727 | if (ret != 0) | |
728 | goto err_free_mem; | |
729 | ||
310355c1 VB |
730 | return 0; |
731 | ||
732 | err_free_mem: | |
733 | kfree(dev); | |
734 | err_release_region: | |
735 | release_mem_region(mem->start, (mem->end - mem->start) + 1); | |
736 | ||
737 | return ret; | |
738 | } | |
739 | ||
5204d496 | 740 | static int davinci_i2s_remove(struct platform_device *pdev) |
310355c1 | 741 | { |
5204d496 | 742 | struct davinci_mcbsp_dev *dev = davinci_i2s_dai.private_data; |
310355c1 VB |
743 | struct resource *mem; |
744 | ||
5204d496 | 745 | snd_soc_unregister_dai(&davinci_i2s_dai); |
310355c1 VB |
746 | clk_disable(dev->clk); |
747 | clk_put(dev->clk); | |
748 | dev->clk = NULL; | |
310355c1 | 749 | kfree(dev); |
310355c1 VB |
750 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
751 | release_mem_region(mem->start, (mem->end - mem->start) + 1); | |
310355c1 | 752 | |
5204d496 C |
753 | return 0; |
754 | } | |
6335d055 | 755 | |
5204d496 C |
756 | static struct platform_driver davinci_mcbsp_driver = { |
757 | .probe = davinci_i2s_probe, | |
758 | .remove = davinci_i2s_remove, | |
759 | .driver = { | |
760 | .name = "davinci-asp", | |
761 | .owner = THIS_MODULE, | |
762 | }, | |
310355c1 | 763 | }; |
310355c1 | 764 | |
c9b3a40f | 765 | static int __init davinci_i2s_init(void) |
3f4b783c | 766 | { |
5204d496 | 767 | return platform_driver_register(&davinci_mcbsp_driver); |
3f4b783c MB |
768 | } |
769 | module_init(davinci_i2s_init); | |
770 | ||
771 | static void __exit davinci_i2s_exit(void) | |
772 | { | |
5204d496 | 773 | platform_driver_unregister(&davinci_mcbsp_driver); |
3f4b783c MB |
774 | } |
775 | module_exit(davinci_i2s_exit); | |
776 | ||
310355c1 VB |
777 | MODULE_AUTHOR("Vladimir Barinov"); |
778 | MODULE_DESCRIPTION("TI DAVINCI I2S (McBSP) SoC Interface"); | |
779 | MODULE_LICENSE("GPL"); |