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17467f23 TT |
1 | /* |
2 | * Freescale SSI ALSA SoC Digital Audio Interface (DAI) driver | |
3 | * | |
4 | * Author: Timur Tabi <timur@freescale.com> | |
5 | * | |
f0fba2ad LG |
6 | * Copyright 2007-2010 Freescale Semiconductor, Inc. |
7 | * | |
8 | * This file is licensed under the terms of the GNU General Public License | |
9 | * version 2. This program is licensed "as is" without any warranty of any | |
10 | * kind, whether express or implied. | |
de623ece MP |
11 | * |
12 | * | |
13 | * Some notes why imx-pcm-fiq is used instead of DMA on some boards: | |
14 | * | |
15 | * The i.MX SSI core has some nasty limitations in AC97 mode. While most | |
16 | * sane processor vendors have a FIFO per AC97 slot, the i.MX has only | |
17 | * one FIFO which combines all valid receive slots. We cannot even select | |
18 | * which slots we want to receive. The WM9712 with which this driver | |
19 | * was developed with always sends GPIO status data in slot 12 which | |
20 | * we receive in our (PCM-) data stream. The only chance we have is to | |
21 | * manually skip this data in the FIQ handler. With sampling rates different | |
22 | * from 48000Hz not every frame has valid receive data, so the ratio | |
23 | * between pcm data and GPIO status data changes. Our FIQ handler is not | |
24 | * able to handle this, hence this driver only works with 48000Hz sampling | |
25 | * rate. | |
26 | * Reading and writing AC97 registers is another challenge. The core | |
27 | * provides us status bits when the read register is updated with *another* | |
28 | * value. When we read the same register two times (and the register still | |
29 | * contains the same value) these status bits are not set. We work | |
30 | * around this by not polling these bits but only wait a fixed delay. | |
17467f23 TT |
31 | */ |
32 | ||
33 | #include <linux/init.h> | |
dfa1a107 | 34 | #include <linux/io.h> |
17467f23 TT |
35 | #include <linux/module.h> |
36 | #include <linux/interrupt.h> | |
95cd98f9 | 37 | #include <linux/clk.h> |
c6682fed | 38 | #include <linux/ctype.h> |
17467f23 TT |
39 | #include <linux/device.h> |
40 | #include <linux/delay.h> | |
b880b805 | 41 | #include <linux/mutex.h> |
5a0e3ad6 | 42 | #include <linux/slab.h> |
aafa85e7 | 43 | #include <linux/spinlock.h> |
9c72a04c | 44 | #include <linux/of.h> |
dfa1a107 SG |
45 | #include <linux/of_address.h> |
46 | #include <linux/of_irq.h> | |
f0fba2ad | 47 | #include <linux/of_platform.h> |
17467f23 | 48 | |
17467f23 TT |
49 | #include <sound/core.h> |
50 | #include <sound/pcm.h> | |
51 | #include <sound/pcm_params.h> | |
52 | #include <sound/initval.h> | |
53 | #include <sound/soc.h> | |
a8909c9b | 54 | #include <sound/dmaengine_pcm.h> |
17467f23 | 55 | |
17467f23 | 56 | #include "fsl_ssi.h" |
09ce1111 | 57 | #include "imx-pcm.h" |
17467f23 | 58 | |
17467f23 TT |
59 | /** |
60 | * FSLSSI_I2S_FORMATS: audio formats supported by the SSI | |
61 | * | |
17467f23 TT |
62 | * The SSI has a limitation in that the samples must be in the same byte |
63 | * order as the host CPU. This is because when multiple bytes are written | |
64 | * to the STX register, the bytes and bits must be written in the same | |
65 | * order. The STX is a shift register, so all the bits need to be aligned | |
66 | * (bit-endianness must match byte-endianness). Processors typically write | |
67 | * the bits within a byte in the same order that the bytes of a word are | |
68 | * written in. So if the host CPU is big-endian, then only big-endian | |
69 | * samples will be written to STX properly. | |
70 | */ | |
71 | #ifdef __BIG_ENDIAN | |
72 | #define FSLSSI_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \ | |
73 | SNDRV_PCM_FMTBIT_S18_3BE | SNDRV_PCM_FMTBIT_S20_3BE | \ | |
74 | SNDRV_PCM_FMTBIT_S24_3BE | SNDRV_PCM_FMTBIT_S24_BE) | |
75 | #else | |
76 | #define FSLSSI_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \ | |
77 | SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE | \ | |
78 | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE) | |
79 | #endif | |
80 | ||
9368acc4 MP |
81 | #define FSLSSI_SIER_DBG_RX_FLAGS (CCSR_SSI_SIER_RFF0_EN | \ |
82 | CCSR_SSI_SIER_RLS_EN | CCSR_SSI_SIER_RFS_EN | \ | |
83 | CCSR_SSI_SIER_ROE0_EN | CCSR_SSI_SIER_RFRC_EN) | |
84 | #define FSLSSI_SIER_DBG_TX_FLAGS (CCSR_SSI_SIER_TFE0_EN | \ | |
85 | CCSR_SSI_SIER_TLS_EN | CCSR_SSI_SIER_TFS_EN | \ | |
86 | CCSR_SSI_SIER_TUE0_EN | CCSR_SSI_SIER_TFRC_EN) | |
c1953bfe MP |
87 | |
88 | enum fsl_ssi_type { | |
89 | FSL_SSI_MCP8610, | |
90 | FSL_SSI_MX21, | |
0888efd1 | 91 | FSL_SSI_MX35, |
c1953bfe MP |
92 | FSL_SSI_MX51, |
93 | }; | |
94 | ||
4e6ec0d9 MP |
95 | struct fsl_ssi_reg_val { |
96 | u32 sier; | |
97 | u32 srcr; | |
98 | u32 stcr; | |
99 | u32 scr; | |
100 | }; | |
101 | ||
102 | struct fsl_ssi_rxtx_reg_val { | |
103 | struct fsl_ssi_reg_val rx; | |
104 | struct fsl_ssi_reg_val tx; | |
105 | }; | |
05cf2379 | 106 | |
05cf2379 ZW |
107 | static bool fsl_ssi_readable_reg(struct device *dev, unsigned int reg) |
108 | { | |
109 | switch (reg) { | |
110 | case CCSR_SSI_SACCEN: | |
111 | case CCSR_SSI_SACCDIS: | |
112 | return false; | |
113 | default: | |
114 | return true; | |
115 | } | |
116 | } | |
117 | ||
118 | static bool fsl_ssi_volatile_reg(struct device *dev, unsigned int reg) | |
119 | { | |
120 | switch (reg) { | |
121 | case CCSR_SSI_STX0: | |
122 | case CCSR_SSI_STX1: | |
123 | case CCSR_SSI_SRX0: | |
124 | case CCSR_SSI_SRX1: | |
125 | case CCSR_SSI_SISR: | |
126 | case CCSR_SSI_SFCSR: | |
3f1c241f | 127 | case CCSR_SSI_SACNT: |
05cf2379 ZW |
128 | case CCSR_SSI_SACADD: |
129 | case CCSR_SSI_SACDAT: | |
130 | case CCSR_SSI_SATAG: | |
131 | case CCSR_SSI_SACCST: | |
3cc6185b | 132 | case CCSR_SSI_SOR: |
05cf2379 ZW |
133 | return true; |
134 | default: | |
135 | return false; | |
136 | } | |
137 | } | |
138 | ||
f51e3d53 MS |
139 | static bool fsl_ssi_precious_reg(struct device *dev, unsigned int reg) |
140 | { | |
141 | switch (reg) { | |
142 | case CCSR_SSI_SRX0: | |
143 | case CCSR_SSI_SRX1: | |
144 | case CCSR_SSI_SISR: | |
145 | case CCSR_SSI_SACADD: | |
146 | case CCSR_SSI_SACDAT: | |
147 | case CCSR_SSI_SATAG: | |
148 | return true; | |
149 | default: | |
150 | return false; | |
151 | } | |
152 | } | |
153 | ||
05cf2379 ZW |
154 | static bool fsl_ssi_writeable_reg(struct device *dev, unsigned int reg) |
155 | { | |
156 | switch (reg) { | |
157 | case CCSR_SSI_SRX0: | |
158 | case CCSR_SSI_SRX1: | |
159 | case CCSR_SSI_SACCST: | |
160 | return false; | |
161 | default: | |
162 | return true; | |
163 | } | |
164 | } | |
165 | ||
43248122 MP |
166 | static const struct regmap_config fsl_ssi_regconfig = { |
167 | .max_register = CCSR_SSI_SACCDIS, | |
168 | .reg_bits = 32, | |
169 | .val_bits = 32, | |
170 | .reg_stride = 4, | |
171 | .val_format_endian = REGMAP_ENDIAN_NATIVE, | |
f26b3b2a | 172 | .num_reg_defaults_raw = CCSR_SSI_SACCDIS / sizeof(uint32_t) + 1, |
05cf2379 ZW |
173 | .readable_reg = fsl_ssi_readable_reg, |
174 | .volatile_reg = fsl_ssi_volatile_reg, | |
f51e3d53 | 175 | .precious_reg = fsl_ssi_precious_reg, |
05cf2379 | 176 | .writeable_reg = fsl_ssi_writeable_reg, |
bfcf928d | 177 | .cache_type = REGCACHE_FLAT, |
43248122 | 178 | }; |
d5a908b2 | 179 | |
fcdbadef SH |
180 | struct fsl_ssi_soc_data { |
181 | bool imx; | |
6139b1b1 | 182 | bool imx21regs; /* imx21-class SSI - no SACC{ST,EN,DIS} regs */ |
fcdbadef SH |
183 | bool offline_config; |
184 | u32 sisr_write_mask; | |
185 | }; | |
186 | ||
17467f23 TT |
187 | /** |
188 | * fsl_ssi_private: per-SSI private data | |
189 | * | |
43248122 | 190 | * @reg: Pointer to the regmap registers |
17467f23 | 191 | * @irq: IRQ of this SSI |
737a6b41 MP |
192 | * @cpu_dai_drv: CPU DAI driver for this device |
193 | * | |
194 | * @dai_fmt: DAI configuration this device is currently used with | |
195 | * @i2s_mode: i2s and network mode configuration of the device. Is used to | |
196 | * switch between normal and i2s/network mode | |
197 | * mode depending on the number of channels | |
198 | * @use_dma: DMA is used or FIQ with stream filter | |
199 | * @use_dual_fifo: DMA with support for both FIFOs used | |
200 | * @fifo_deph: Depth of the SSI FIFOs | |
b0a7043d NC |
201 | * @slot_width: width of each DAI slot |
202 | * @slots: number of slots | |
737a6b41 MP |
203 | * @rxtx_reg_val: Specific register settings for receive/transmit configuration |
204 | * | |
205 | * @clk: SSI clock | |
206 | * @baudclk: SSI baud clock for master mode | |
207 | * @baudclk_streams: Active streams that are using baudclk | |
737a6b41 MP |
208 | * |
209 | * @dma_params_tx: DMA transmit parameters | |
210 | * @dma_params_rx: DMA receive parameters | |
211 | * @ssi_phys: physical address of the SSI registers | |
212 | * | |
213 | * @fiq_params: FIQ stream filtering parameters | |
214 | * | |
215 | * @pdev: Pointer to pdev used for deprecated fsl-ssi sound card | |
216 | * | |
217 | * @dbg_stats: Debugging statistics | |
218 | * | |
dcfcf2c2 | 219 | * @soc: SoC specific data |
4ee437fb CC |
220 | * |
221 | * @fifo_watermark: the FIFO watermark setting. Notifies DMA when | |
222 | * there are @fifo_watermark or fewer words in TX fifo or | |
223 | * @fifo_watermark or more empty words in RX fifo. | |
224 | * @dma_maxburst: max number of words to transfer in one go. So far, | |
225 | * this is always the same as fifo_watermark. | |
17467f23 TT |
226 | */ |
227 | struct fsl_ssi_private { | |
43248122 | 228 | struct regmap *regs; |
9e446ad5 | 229 | int irq; |
f0fba2ad | 230 | struct snd_soc_dai_driver cpu_dai_drv; |
17467f23 | 231 | |
737a6b41 MP |
232 | unsigned int dai_fmt; |
233 | u8 i2s_mode; | |
de623ece | 234 | bool use_dma; |
0da9e55e | 235 | bool use_dual_fifo; |
f4a43cab | 236 | bool has_ipg_clk_name; |
737a6b41 | 237 | unsigned int fifo_depth; |
b0a7043d NC |
238 | unsigned int slot_width; |
239 | unsigned int slots; | |
737a6b41 MP |
240 | struct fsl_ssi_rxtx_reg_val rxtx_reg_val; |
241 | ||
95cd98f9 | 242 | struct clk *clk; |
737a6b41 | 243 | struct clk *baudclk; |
d429d8e3 | 244 | unsigned int baudclk_streams; |
737a6b41 | 245 | |
3f1c241f | 246 | /* regcache for volatile regs */ |
05cf2379 | 247 | u32 regcache_sfcsr; |
3f1c241f | 248 | u32 regcache_sacnt; |
05cf2379 | 249 | |
737a6b41 | 250 | /* DMA params */ |
a8909c9b LPC |
251 | struct snd_dmaengine_dai_dma_data dma_params_tx; |
252 | struct snd_dmaengine_dai_dma_data dma_params_rx; | |
737a6b41 MP |
253 | dma_addr_t ssi_phys; |
254 | ||
255 | /* params for non-dma FIQ stream filtered mode */ | |
de623ece | 256 | struct imx_pcm_fiq_params fiq_params; |
737a6b41 MP |
257 | |
258 | /* Used when using fsl-ssi as sound-card. This is only used by ppc and | |
259 | * should be replaced with simple-sound-card. */ | |
260 | struct platform_device *pdev; | |
09ce1111 | 261 | |
f138e621 | 262 | struct fsl_ssi_dbg dbg_stats; |
17467f23 | 263 | |
fcdbadef | 264 | const struct fsl_ssi_soc_data *soc; |
0096b693 | 265 | struct device *dev; |
4ee437fb CC |
266 | |
267 | u32 fifo_watermark; | |
268 | u32 dma_maxburst; | |
b880b805 MS |
269 | |
270 | struct mutex ac97_reg_lock; | |
c1953bfe | 271 | }; |
171d683d MP |
272 | |
273 | /* | |
274 | * imx51 and later SoCs have a slightly different IP that allows the | |
275 | * SSI configuration while the SSI unit is running. | |
276 | * | |
277 | * More important, it is necessary on those SoCs to configure the | |
278 | * sperate TX/RX DMA bits just before starting the stream | |
279 | * (fsl_ssi_trigger). The SDMA unit has to be configured before fsl_ssi | |
280 | * sends any DMA requests to the SDMA unit, otherwise it is not defined | |
281 | * how the SDMA unit handles the DMA request. | |
282 | * | |
283 | * SDMA units are present on devices starting at imx35 but the imx35 | |
284 | * reference manual states that the DMA bits should not be changed | |
285 | * while the SSI unit is running (SSIEN). So we support the necessary | |
286 | * online configuration of fsl-ssi starting at imx51. | |
287 | */ | |
171d683d | 288 | |
fcdbadef SH |
289 | static struct fsl_ssi_soc_data fsl_ssi_mpc8610 = { |
290 | .imx = false, | |
291 | .offline_config = true, | |
292 | .sisr_write_mask = CCSR_SSI_SISR_RFRC | CCSR_SSI_SISR_TFRC | | |
293 | CCSR_SSI_SISR_ROE0 | CCSR_SSI_SISR_ROE1 | | |
294 | CCSR_SSI_SISR_TUE0 | CCSR_SSI_SISR_TUE1, | |
295 | }; | |
296 | ||
297 | static struct fsl_ssi_soc_data fsl_ssi_imx21 = { | |
298 | .imx = true, | |
6139b1b1 | 299 | .imx21regs = true, |
fcdbadef SH |
300 | .offline_config = true, |
301 | .sisr_write_mask = 0, | |
302 | }; | |
303 | ||
304 | static struct fsl_ssi_soc_data fsl_ssi_imx35 = { | |
305 | .imx = true, | |
306 | .offline_config = true, | |
307 | .sisr_write_mask = CCSR_SSI_SISR_RFRC | CCSR_SSI_SISR_TFRC | | |
308 | CCSR_SSI_SISR_ROE0 | CCSR_SSI_SISR_ROE1 | | |
309 | CCSR_SSI_SISR_TUE0 | CCSR_SSI_SISR_TUE1, | |
310 | }; | |
311 | ||
312 | static struct fsl_ssi_soc_data fsl_ssi_imx51 = { | |
313 | .imx = true, | |
314 | .offline_config = false, | |
315 | .sisr_write_mask = CCSR_SSI_SISR_ROE0 | CCSR_SSI_SISR_ROE1 | | |
316 | CCSR_SSI_SISR_TUE0 | CCSR_SSI_SISR_TUE1, | |
317 | }; | |
318 | ||
319 | static const struct of_device_id fsl_ssi_ids[] = { | |
320 | { .compatible = "fsl,mpc8610-ssi", .data = &fsl_ssi_mpc8610 }, | |
321 | { .compatible = "fsl,imx51-ssi", .data = &fsl_ssi_imx51 }, | |
322 | { .compatible = "fsl,imx35-ssi", .data = &fsl_ssi_imx35 }, | |
323 | { .compatible = "fsl,imx21-ssi", .data = &fsl_ssi_imx21 }, | |
324 | {} | |
325 | }; | |
326 | MODULE_DEVICE_TABLE(of, fsl_ssi_ids); | |
327 | ||
328 | static bool fsl_ssi_is_ac97(struct fsl_ssi_private *ssi_private) | |
329 | { | |
5b64c173 AT |
330 | return (ssi_private->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) == |
331 | SND_SOC_DAIFMT_AC97; | |
171d683d MP |
332 | } |
333 | ||
8dd51e23 SH |
334 | static bool fsl_ssi_is_i2s_master(struct fsl_ssi_private *ssi_private) |
335 | { | |
336 | return (ssi_private->dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) == | |
337 | SND_SOC_DAIFMT_CBS_CFS; | |
338 | } | |
339 | ||
cf4f7fc3 FF |
340 | static bool fsl_ssi_is_i2s_cbm_cfs(struct fsl_ssi_private *ssi_private) |
341 | { | |
342 | return (ssi_private->dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) == | |
343 | SND_SOC_DAIFMT_CBM_CFS; | |
344 | } | |
17467f23 TT |
345 | /** |
346 | * fsl_ssi_isr: SSI interrupt handler | |
347 | * | |
348 | * Although it's possible to use the interrupt handler to send and receive | |
349 | * data to/from the SSI, we use the DMA instead. Programming is more | |
350 | * complicated, but the performance is much better. | |
351 | * | |
352 | * This interrupt handler is used only to gather statistics. | |
353 | * | |
354 | * @irq: IRQ of the SSI device | |
355 | * @dev_id: pointer to the ssi_private structure for this SSI device | |
356 | */ | |
357 | static irqreturn_t fsl_ssi_isr(int irq, void *dev_id) | |
358 | { | |
359 | struct fsl_ssi_private *ssi_private = dev_id; | |
43248122 | 360 | struct regmap *regs = ssi_private->regs; |
17467f23 | 361 | __be32 sisr; |
0888efd1 | 362 | __be32 sisr2; |
17467f23 TT |
363 | |
364 | /* We got an interrupt, so read the status register to see what we | |
365 | were interrupted for. We mask it with the Interrupt Enable register | |
366 | so that we only check for events that we're interested in. | |
367 | */ | |
43248122 | 368 | regmap_read(regs, CCSR_SSI_SISR, &sisr); |
17467f23 | 369 | |
fcdbadef | 370 | sisr2 = sisr & ssi_private->soc->sisr_write_mask; |
17467f23 TT |
371 | /* Clear the bits that we set */ |
372 | if (sisr2) | |
43248122 | 373 | regmap_write(regs, CCSR_SSI_SISR, sisr2); |
17467f23 | 374 | |
f138e621 | 375 | fsl_ssi_dbg_isr(&ssi_private->dbg_stats, sisr); |
9368acc4 | 376 | |
f138e621 | 377 | return IRQ_HANDLED; |
9368acc4 MP |
378 | } |
379 | ||
4e6ec0d9 MP |
380 | /* |
381 | * Enable/Disable all rx/tx config flags at once. | |
382 | */ | |
383 | static void fsl_ssi_rxtx_config(struct fsl_ssi_private *ssi_private, | |
384 | bool enable) | |
385 | { | |
43248122 | 386 | struct regmap *regs = ssi_private->regs; |
4e6ec0d9 MP |
387 | struct fsl_ssi_rxtx_reg_val *vals = &ssi_private->rxtx_reg_val; |
388 | ||
389 | if (enable) { | |
43248122 MP |
390 | regmap_update_bits(regs, CCSR_SSI_SIER, |
391 | vals->rx.sier | vals->tx.sier, | |
392 | vals->rx.sier | vals->tx.sier); | |
393 | regmap_update_bits(regs, CCSR_SSI_SRCR, | |
394 | vals->rx.srcr | vals->tx.srcr, | |
395 | vals->rx.srcr | vals->tx.srcr); | |
396 | regmap_update_bits(regs, CCSR_SSI_STCR, | |
397 | vals->rx.stcr | vals->tx.stcr, | |
398 | vals->rx.stcr | vals->tx.stcr); | |
4e6ec0d9 | 399 | } else { |
43248122 MP |
400 | regmap_update_bits(regs, CCSR_SSI_SRCR, |
401 | vals->rx.srcr | vals->tx.srcr, 0); | |
402 | regmap_update_bits(regs, CCSR_SSI_STCR, | |
403 | vals->rx.stcr | vals->tx.stcr, 0); | |
404 | regmap_update_bits(regs, CCSR_SSI_SIER, | |
405 | vals->rx.sier | vals->tx.sier, 0); | |
4e6ec0d9 MP |
406 | } |
407 | } | |
408 | ||
027db2e1 AM |
409 | /* |
410 | * Clear RX or TX FIFO to remove samples from the previous | |
411 | * stream session which may be still present in the FIFO and | |
412 | * may introduce bad samples and/or channel slipping. | |
413 | * | |
414 | * Note: The SOR is not documented in recent IMX datasheet, but | |
415 | * is described in IMX51 reference manual at section 56.3.3.15. | |
416 | */ | |
417 | static void fsl_ssi_fifo_clear(struct fsl_ssi_private *ssi_private, | |
418 | bool is_rx) | |
419 | { | |
420 | if (is_rx) { | |
421 | regmap_update_bits(ssi_private->regs, CCSR_SSI_SOR, | |
422 | CCSR_SSI_SOR_RX_CLR, CCSR_SSI_SOR_RX_CLR); | |
423 | } else { | |
424 | regmap_update_bits(ssi_private->regs, CCSR_SSI_SOR, | |
425 | CCSR_SSI_SOR_TX_CLR, CCSR_SSI_SOR_TX_CLR); | |
426 | } | |
427 | } | |
428 | ||
65c961cc MP |
429 | /* |
430 | * Calculate the bits that have to be disabled for the current stream that is | |
431 | * getting disabled. This keeps the bits enabled that are necessary for the | |
432 | * second stream to work if 'stream_active' is true. | |
433 | * | |
434 | * Detailed calculation: | |
435 | * These are the values that need to be active after disabling. For non-active | |
436 | * second stream, this is 0: | |
437 | * vals_stream * !!stream_active | |
438 | * | |
439 | * The following computes the overall differences between the setup for the | |
440 | * to-disable stream and the active stream, a simple XOR: | |
441 | * vals_disable ^ (vals_stream * !!(stream_active)) | |
442 | * | |
443 | * The full expression adds a mask on all values we care about | |
444 | */ | |
445 | #define fsl_ssi_disable_val(vals_disable, vals_stream, stream_active) \ | |
446 | ((vals_disable) & \ | |
447 | ((vals_disable) ^ ((vals_stream) * (u32)!!(stream_active)))) | |
448 | ||
4e6ec0d9 MP |
449 | /* |
450 | * Enable/Disable a ssi configuration. You have to pass either | |
451 | * ssi_private->rxtx_reg_val.rx or tx as vals parameter. | |
452 | */ | |
453 | static void fsl_ssi_config(struct fsl_ssi_private *ssi_private, bool enable, | |
454 | struct fsl_ssi_reg_val *vals) | |
455 | { | |
43248122 | 456 | struct regmap *regs = ssi_private->regs; |
4e6ec0d9 | 457 | struct fsl_ssi_reg_val *avals; |
43248122 MP |
458 | int nr_active_streams; |
459 | u32 scr_val; | |
65c961cc MP |
460 | int keep_active; |
461 | ||
43248122 MP |
462 | regmap_read(regs, CCSR_SSI_SCR, &scr_val); |
463 | ||
464 | nr_active_streams = !!(scr_val & CCSR_SSI_SCR_TE) + | |
465 | !!(scr_val & CCSR_SSI_SCR_RE); | |
466 | ||
65c961cc MP |
467 | if (nr_active_streams - 1 > 0) |
468 | keep_active = 1; | |
469 | else | |
470 | keep_active = 0; | |
4e6ec0d9 MP |
471 | |
472 | /* Find the other direction values rx or tx which we do not want to | |
473 | * modify */ | |
474 | if (&ssi_private->rxtx_reg_val.rx == vals) | |
475 | avals = &ssi_private->rxtx_reg_val.tx; | |
476 | else | |
477 | avals = &ssi_private->rxtx_reg_val.rx; | |
478 | ||
479 | /* If vals should be disabled, start with disabling the unit */ | |
480 | if (!enable) { | |
65c961cc MP |
481 | u32 scr = fsl_ssi_disable_val(vals->scr, avals->scr, |
482 | keep_active); | |
43248122 | 483 | regmap_update_bits(regs, CCSR_SSI_SCR, scr, 0); |
4e6ec0d9 MP |
484 | } |
485 | ||
486 | /* | |
487 | * We are running on a SoC which does not support online SSI | |
488 | * reconfiguration, so we have to enable all necessary flags at once | |
489 | * even if we do not use them later (capture and playback configuration) | |
490 | */ | |
fcdbadef | 491 | if (ssi_private->soc->offline_config) { |
4e6ec0d9 | 492 | if ((enable && !nr_active_streams) || |
65c961cc | 493 | (!enable && !keep_active)) |
4e6ec0d9 MP |
494 | fsl_ssi_rxtx_config(ssi_private, enable); |
495 | ||
496 | goto config_done; | |
497 | } | |
498 | ||
499 | /* | |
500 | * Configure single direction units while the SSI unit is running | |
501 | * (online configuration) | |
502 | */ | |
503 | if (enable) { | |
027db2e1 AM |
504 | fsl_ssi_fifo_clear(ssi_private, vals->scr & CCSR_SSI_SCR_RE); |
505 | ||
43248122 MP |
506 | regmap_update_bits(regs, CCSR_SSI_SRCR, vals->srcr, vals->srcr); |
507 | regmap_update_bits(regs, CCSR_SSI_STCR, vals->stcr, vals->stcr); | |
d9f2a202 | 508 | regmap_update_bits(regs, CCSR_SSI_SIER, vals->sier, vals->sier); |
4e6ec0d9 MP |
509 | } else { |
510 | u32 sier; | |
511 | u32 srcr; | |
512 | u32 stcr; | |
513 | ||
514 | /* | |
515 | * Disabling the necessary flags for one of rx/tx while the | |
516 | * other stream is active is a little bit more difficult. We | |
517 | * have to disable only those flags that differ between both | |
518 | * streams (rx XOR tx) and that are set in the stream that is | |
519 | * disabled now. Otherwise we could alter flags of the other | |
520 | * stream | |
521 | */ | |
522 | ||
523 | /* These assignments are simply vals without bits set in avals*/ | |
65c961cc MP |
524 | sier = fsl_ssi_disable_val(vals->sier, avals->sier, |
525 | keep_active); | |
526 | srcr = fsl_ssi_disable_val(vals->srcr, avals->srcr, | |
527 | keep_active); | |
528 | stcr = fsl_ssi_disable_val(vals->stcr, avals->stcr, | |
529 | keep_active); | |
4e6ec0d9 | 530 | |
43248122 MP |
531 | regmap_update_bits(regs, CCSR_SSI_SRCR, srcr, 0); |
532 | regmap_update_bits(regs, CCSR_SSI_STCR, stcr, 0); | |
533 | regmap_update_bits(regs, CCSR_SSI_SIER, sier, 0); | |
4e6ec0d9 MP |
534 | } |
535 | ||
536 | config_done: | |
537 | /* Enabling of subunits is done after configuration */ | |
61fcf10a AM |
538 | if (enable) { |
539 | if (ssi_private->use_dma && (vals->scr & CCSR_SSI_SCR_TE)) { | |
540 | /* | |
541 | * Be sure the Tx FIFO is filled when TE is set. | |
542 | * Otherwise, there are some chances to start the | |
543 | * playback with some void samples inserted first, | |
544 | * generating a channel slip. | |
545 | * | |
546 | * First, SSIEN must be set, to let the FIFO be filled. | |
547 | * | |
548 | * Notes: | |
549 | * - Limit this fix to the DMA case until FIQ cases can | |
550 | * be tested. | |
551 | * - Limit the length of the busy loop to not lock the | |
552 | * system too long, even if 1-2 loops are sufficient | |
553 | * in general. | |
554 | */ | |
555 | int i; | |
556 | int max_loop = 100; | |
557 | regmap_update_bits(regs, CCSR_SSI_SCR, | |
558 | CCSR_SSI_SCR_SSIEN, CCSR_SSI_SCR_SSIEN); | |
559 | for (i = 0; i < max_loop; i++) { | |
560 | u32 sfcsr; | |
561 | regmap_read(regs, CCSR_SSI_SFCSR, &sfcsr); | |
562 | if (CCSR_SSI_SFCSR_TFCNT0(sfcsr)) | |
563 | break; | |
564 | } | |
565 | if (i == max_loop) { | |
566 | dev_err(ssi_private->dev, | |
567 | "Timeout waiting TX FIFO filling\n"); | |
568 | } | |
569 | } | |
43248122 | 570 | regmap_update_bits(regs, CCSR_SSI_SCR, vals->scr, vals->scr); |
61fcf10a | 571 | } |
4e6ec0d9 MP |
572 | } |
573 | ||
574 | ||
575 | static void fsl_ssi_rx_config(struct fsl_ssi_private *ssi_private, bool enable) | |
576 | { | |
577 | fsl_ssi_config(ssi_private, enable, &ssi_private->rxtx_reg_val.rx); | |
578 | } | |
579 | ||
580 | static void fsl_ssi_tx_config(struct fsl_ssi_private *ssi_private, bool enable) | |
581 | { | |
582 | fsl_ssi_config(ssi_private, enable, &ssi_private->rxtx_reg_val.tx); | |
583 | } | |
584 | ||
6de83879 MP |
585 | /* |
586 | * Setup rx/tx register values used to enable/disable the streams. These will | |
587 | * be used later in fsl_ssi_config to setup the streams without the need to | |
588 | * check for all different SSI modes. | |
589 | */ | |
590 | static void fsl_ssi_setup_reg_vals(struct fsl_ssi_private *ssi_private) | |
591 | { | |
592 | struct fsl_ssi_rxtx_reg_val *reg = &ssi_private->rxtx_reg_val; | |
593 | ||
594 | reg->rx.sier = CCSR_SSI_SIER_RFF0_EN; | |
595 | reg->rx.srcr = CCSR_SSI_SRCR_RFEN0; | |
596 | reg->rx.scr = 0; | |
597 | reg->tx.sier = CCSR_SSI_SIER_TFE0_EN; | |
598 | reg->tx.stcr = CCSR_SSI_STCR_TFEN0; | |
599 | reg->tx.scr = 0; | |
600 | ||
171d683d | 601 | if (!fsl_ssi_is_ac97(ssi_private)) { |
6de83879 | 602 | reg->rx.scr = CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_RE; |
6de83879 | 603 | reg->tx.scr = CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_TE; |
6de83879 MP |
604 | } |
605 | ||
606 | if (ssi_private->use_dma) { | |
607 | reg->rx.sier |= CCSR_SSI_SIER_RDMAE; | |
608 | reg->tx.sier |= CCSR_SSI_SIER_TDMAE; | |
609 | } else { | |
610 | reg->rx.sier |= CCSR_SSI_SIER_RIE; | |
611 | reg->tx.sier |= CCSR_SSI_SIER_TIE; | |
612 | } | |
613 | ||
614 | reg->rx.sier |= FSLSSI_SIER_DBG_RX_FLAGS; | |
615 | reg->tx.sier |= FSLSSI_SIER_DBG_TX_FLAGS; | |
616 | } | |
617 | ||
d8764646 MP |
618 | static void fsl_ssi_setup_ac97(struct fsl_ssi_private *ssi_private) |
619 | { | |
43248122 | 620 | struct regmap *regs = ssi_private->regs; |
d8764646 MP |
621 | |
622 | /* | |
623 | * Setup the clock control register | |
624 | */ | |
43248122 MP |
625 | regmap_write(regs, CCSR_SSI_STCCR, |
626 | CCSR_SSI_SxCCR_WL(17) | CCSR_SSI_SxCCR_DC(13)); | |
627 | regmap_write(regs, CCSR_SSI_SRCCR, | |
628 | CCSR_SSI_SxCCR_WL(17) | CCSR_SSI_SxCCR_DC(13)); | |
d8764646 MP |
629 | |
630 | /* | |
631 | * Enable AC97 mode and startup the SSI | |
632 | */ | |
43248122 MP |
633 | regmap_write(regs, CCSR_SSI_SACNT, |
634 | CCSR_SSI_SACNT_AC97EN | CCSR_SSI_SACNT_FV); | |
6139b1b1 MS |
635 | |
636 | /* no SACC{ST,EN,DIS} regs on imx21-class SSI */ | |
637 | if (!ssi_private->soc->imx21regs) { | |
638 | regmap_write(regs, CCSR_SSI_SACCDIS, 0xff); | |
639 | regmap_write(regs, CCSR_SSI_SACCEN, 0x300); | |
640 | } | |
d8764646 MP |
641 | |
642 | /* | |
643 | * Enable SSI, Transmit and Receive. AC97 has to communicate with the | |
644 | * codec before a stream is started. | |
645 | */ | |
43248122 MP |
646 | regmap_update_bits(regs, CCSR_SSI_SCR, |
647 | CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE, | |
648 | CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE); | |
d8764646 | 649 | |
43248122 | 650 | regmap_write(regs, CCSR_SSI_SOR, CCSR_SSI_SOR_WAIT(3)); |
d8764646 MP |
651 | } |
652 | ||
17467f23 TT |
653 | /** |
654 | * fsl_ssi_startup: create a new substream | |
655 | * | |
656 | * This is the first function called when a stream is opened. | |
657 | * | |
658 | * If this is the first stream open, then grab the IRQ and program most of | |
659 | * the SSI registers. | |
660 | */ | |
dee89c4d MB |
661 | static int fsl_ssi_startup(struct snd_pcm_substream *substream, |
662 | struct snd_soc_dai *dai) | |
17467f23 TT |
663 | { |
664 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
5e538eca TT |
665 | struct fsl_ssi_private *ssi_private = |
666 | snd_soc_dai_get_drvdata(rtd->cpu_dai); | |
f4a43cab SW |
667 | int ret; |
668 | ||
669 | ret = clk_prepare_enable(ssi_private->clk); | |
670 | if (ret) | |
671 | return ret; | |
17467f23 | 672 | |
0da9e55e NC |
673 | /* When using dual fifo mode, it is safer to ensure an even period |
674 | * size. If appearing to an odd number while DMA always starts its | |
675 | * task from fifo0, fifo1 would be neglected at the end of each | |
676 | * period. But SSI would still access fifo1 with an invalid data. | |
677 | */ | |
678 | if (ssi_private->use_dual_fifo) | |
679 | snd_pcm_hw_constraint_step(substream->runtime, 0, | |
680 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2); | |
681 | ||
17467f23 TT |
682 | return 0; |
683 | } | |
684 | ||
f4a43cab SW |
685 | /** |
686 | * fsl_ssi_shutdown: shutdown the SSI | |
687 | * | |
688 | */ | |
689 | static void fsl_ssi_shutdown(struct snd_pcm_substream *substream, | |
690 | struct snd_soc_dai *dai) | |
691 | { | |
692 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
693 | struct fsl_ssi_private *ssi_private = | |
694 | snd_soc_dai_get_drvdata(rtd->cpu_dai); | |
695 | ||
696 | clk_disable_unprepare(ssi_private->clk); | |
697 | ||
698 | } | |
699 | ||
ee9daad4 | 700 | /** |
8dd51e23 | 701 | * fsl_ssi_set_bclk - configure Digital Audio Interface bit clock |
ee9daad4 SH |
702 | * |
703 | * Note: This function can be only called when using SSI as DAI master | |
704 | * | |
705 | * Quick instruction for parameters: | |
b0a7043d NC |
706 | * freq: Output BCLK frequency = samplerate * slots * slot_width |
707 | * (In 2-channel I2S Master mode, slot_width is fixed 32) | |
ee9daad4 | 708 | */ |
8dd51e23 SH |
709 | static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream, |
710 | struct snd_soc_dai *cpu_dai, | |
711 | struct snd_pcm_hw_params *hw_params) | |
ee9daad4 SH |
712 | { |
713 | struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(cpu_dai); | |
43248122 | 714 | struct regmap *regs = ssi_private->regs; |
ee9daad4 SH |
715 | int synchronous = ssi_private->cpu_dai_drv.symmetric_rates, ret; |
716 | u32 pm = 999, div2, psr, stccr, mask, afreq, factor, i; | |
d8ced479 | 717 | unsigned long clkrate, baudrate, tmprate; |
b0a7043d NC |
718 | unsigned int slots = params_channels(hw_params); |
719 | unsigned int slot_width = 32; | |
ee9daad4 | 720 | u64 sub, savesub = 100000; |
8dd51e23 | 721 | unsigned int freq; |
d429d8e3 | 722 | bool baudclk_is_used; |
8dd51e23 | 723 | |
b0a7043d NC |
724 | /* Override slots and slot_width if being specifically set... */ |
725 | if (ssi_private->slots) | |
726 | slots = ssi_private->slots; | |
727 | /* ...but keep 32 bits if slots is 2 -- I2S Master mode */ | |
728 | if (ssi_private->slot_width && slots != 2) | |
729 | slot_width = ssi_private->slot_width; | |
730 | ||
731 | /* Generate bit clock based on the slot number and slot width */ | |
732 | freq = slots * slot_width * params_rate(hw_params); | |
ee9daad4 SH |
733 | |
734 | /* Don't apply it to any non-baudclk circumstance */ | |
735 | if (IS_ERR(ssi_private->baudclk)) | |
736 | return -EINVAL; | |
737 | ||
e09745f2 AM |
738 | /* |
739 | * Hardware limitation: The bclk rate must be | |
740 | * never greater than 1/5 IPG clock rate | |
741 | */ | |
742 | if (freq * 5 > clk_get_rate(ssi_private->clk)) { | |
743 | dev_err(cpu_dai->dev, "bitclk > ipgclk/5\n"); | |
744 | return -EINVAL; | |
745 | } | |
746 | ||
d429d8e3 MP |
747 | baudclk_is_used = ssi_private->baudclk_streams & ~(BIT(substream->stream)); |
748 | ||
ee9daad4 SH |
749 | /* It should be already enough to divide clock by setting pm alone */ |
750 | psr = 0; | |
751 | div2 = 0; | |
752 | ||
753 | factor = (div2 + 1) * (7 * psr + 1) * 2; | |
754 | ||
755 | for (i = 0; i < 255; i++) { | |
6c8ca30e | 756 | tmprate = freq * factor * (i + 1); |
d429d8e3 MP |
757 | |
758 | if (baudclk_is_used) | |
759 | clkrate = clk_get_rate(ssi_private->baudclk); | |
760 | else | |
761 | clkrate = clk_round_rate(ssi_private->baudclk, tmprate); | |
ee9daad4 | 762 | |
acf2c60a TT |
763 | clkrate /= factor; |
764 | afreq = clkrate / (i + 1); | |
ee9daad4 SH |
765 | |
766 | if (freq == afreq) | |
767 | sub = 0; | |
768 | else if (freq / afreq == 1) | |
769 | sub = freq - afreq; | |
770 | else if (afreq / freq == 1) | |
771 | sub = afreq - freq; | |
772 | else | |
773 | continue; | |
774 | ||
775 | /* Calculate the fraction */ | |
776 | sub *= 100000; | |
777 | do_div(sub, freq); | |
778 | ||
ebac95a9 | 779 | if (sub < savesub && !(i == 0 && psr == 0 && div2 == 0)) { |
ee9daad4 SH |
780 | baudrate = tmprate; |
781 | savesub = sub; | |
782 | pm = i; | |
783 | } | |
784 | ||
785 | /* We are lucky */ | |
786 | if (savesub == 0) | |
787 | break; | |
788 | } | |
789 | ||
790 | /* No proper pm found if it is still remaining the initial value */ | |
791 | if (pm == 999) { | |
792 | dev_err(cpu_dai->dev, "failed to handle the required sysclk\n"); | |
793 | return -EINVAL; | |
794 | } | |
795 | ||
796 | stccr = CCSR_SSI_SxCCR_PM(pm + 1) | (div2 ? CCSR_SSI_SxCCR_DIV2 : 0) | | |
797 | (psr ? CCSR_SSI_SxCCR_PSR : 0); | |
798 | mask = CCSR_SSI_SxCCR_PM_MASK | CCSR_SSI_SxCCR_DIV2 | | |
799 | CCSR_SSI_SxCCR_PSR; | |
800 | ||
8dd51e23 | 801 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK || synchronous) |
43248122 | 802 | regmap_update_bits(regs, CCSR_SSI_STCCR, mask, stccr); |
ee9daad4 | 803 | else |
43248122 | 804 | regmap_update_bits(regs, CCSR_SSI_SRCCR, mask, stccr); |
ee9daad4 | 805 | |
d429d8e3 | 806 | if (!baudclk_is_used) { |
ee9daad4 SH |
807 | ret = clk_set_rate(ssi_private->baudclk, baudrate); |
808 | if (ret) { | |
ee9daad4 SH |
809 | dev_err(cpu_dai->dev, "failed to set baudclk rate\n"); |
810 | return -EINVAL; | |
811 | } | |
ee9daad4 | 812 | } |
ee9daad4 SH |
813 | |
814 | return 0; | |
815 | } | |
816 | ||
17467f23 | 817 | /** |
85ef2375 | 818 | * fsl_ssi_hw_params - program the sample size |
17467f23 TT |
819 | * |
820 | * Most of the SSI registers have been programmed in the startup function, | |
821 | * but the word length must be programmed here. Unfortunately, programming | |
822 | * the SxCCR.WL bits requires the SSI to be temporarily disabled. This can | |
823 | * cause a problem with supporting simultaneous playback and capture. If | |
824 | * the SSI is already playing a stream, then that stream may be temporarily | |
825 | * stopped when you start capture. | |
826 | * | |
827 | * Note: The SxCCR.DC and SxCCR.PM bits are only used if the SSI is the | |
828 | * clock master. | |
829 | */ | |
85ef2375 TT |
830 | static int fsl_ssi_hw_params(struct snd_pcm_substream *substream, |
831 | struct snd_pcm_hw_params *hw_params, struct snd_soc_dai *cpu_dai) | |
17467f23 | 832 | { |
f0fba2ad | 833 | struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(cpu_dai); |
43248122 | 834 | struct regmap *regs = ssi_private->regs; |
2924a998 | 835 | unsigned int channels = params_channels(hw_params); |
4ca73043 | 836 | unsigned int sample_size = params_width(hw_params); |
5e538eca | 837 | u32 wl = CCSR_SSI_SxCCR_WL(sample_size); |
8dd51e23 | 838 | int ret; |
43248122 MP |
839 | u32 scr_val; |
840 | int enabled; | |
841 | ||
842 | regmap_read(regs, CCSR_SSI_SCR, &scr_val); | |
843 | enabled = scr_val & CCSR_SSI_SCR_SSIEN; | |
17467f23 | 844 | |
5e538eca TT |
845 | /* |
846 | * If we're in synchronous mode, and the SSI is already enabled, | |
847 | * then STCCR is already set properly. | |
848 | */ | |
849 | if (enabled && ssi_private->cpu_dai_drv.symmetric_rates) | |
850 | return 0; | |
17467f23 | 851 | |
8dd51e23 SH |
852 | if (fsl_ssi_is_i2s_master(ssi_private)) { |
853 | ret = fsl_ssi_set_bclk(substream, cpu_dai, hw_params); | |
854 | if (ret) | |
855 | return ret; | |
d429d8e3 MP |
856 | |
857 | /* Do not enable the clock if it is already enabled */ | |
858 | if (!(ssi_private->baudclk_streams & BIT(substream->stream))) { | |
859 | ret = clk_prepare_enable(ssi_private->baudclk); | |
860 | if (ret) | |
861 | return ret; | |
862 | ||
863 | ssi_private->baudclk_streams |= BIT(substream->stream); | |
864 | } | |
8dd51e23 SH |
865 | } |
866 | ||
cf4f7fc3 FF |
867 | if (!fsl_ssi_is_ac97(ssi_private)) { |
868 | u8 i2smode; | |
869 | /* | |
870 | * Switch to normal net mode in order to have a frame sync | |
871 | * signal every 32 bits instead of 16 bits | |
872 | */ | |
873 | if (fsl_ssi_is_i2s_cbm_cfs(ssi_private) && sample_size == 16) | |
874 | i2smode = CCSR_SSI_SCR_I2S_MODE_NORMAL | | |
875 | CCSR_SSI_SCR_NET; | |
876 | else | |
877 | i2smode = ssi_private->i2s_mode; | |
878 | ||
879 | regmap_update_bits(regs, CCSR_SSI_SCR, | |
880 | CCSR_SSI_SCR_NET | CCSR_SSI_SCR_I2S_MODE_MASK, | |
881 | channels == 1 ? 0 : i2smode); | |
882 | } | |
883 | ||
5e538eca TT |
884 | /* |
885 | * FIXME: The documentation says that SxCCR[WL] should not be | |
886 | * modified while the SSI is enabled. The only time this can | |
887 | * happen is if we're trying to do simultaneous playback and | |
888 | * capture in asynchronous mode. Unfortunately, I have been enable | |
889 | * to get that to work at all on the P1022DS. Therefore, we don't | |
890 | * bother to disable/enable the SSI when setting SxCCR[WL], because | |
891 | * the SSI will stop anyway. Maybe one day, this will get fixed. | |
892 | */ | |
17467f23 | 893 | |
5e538eca TT |
894 | /* In synchronous mode, the SSI uses STCCR for capture */ |
895 | if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) || | |
896 | ssi_private->cpu_dai_drv.symmetric_rates) | |
43248122 MP |
897 | regmap_update_bits(regs, CCSR_SSI_STCCR, CCSR_SSI_SxCCR_WL_MASK, |
898 | wl); | |
5e538eca | 899 | else |
43248122 MP |
900 | regmap_update_bits(regs, CCSR_SSI_SRCCR, CCSR_SSI_SxCCR_WL_MASK, |
901 | wl); | |
17467f23 TT |
902 | |
903 | return 0; | |
904 | } | |
905 | ||
d429d8e3 MP |
906 | static int fsl_ssi_hw_free(struct snd_pcm_substream *substream, |
907 | struct snd_soc_dai *cpu_dai) | |
908 | { | |
909 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
910 | struct fsl_ssi_private *ssi_private = | |
911 | snd_soc_dai_get_drvdata(rtd->cpu_dai); | |
912 | ||
913 | if (fsl_ssi_is_i2s_master(ssi_private) && | |
914 | ssi_private->baudclk_streams & BIT(substream->stream)) { | |
915 | clk_disable_unprepare(ssi_private->baudclk); | |
916 | ssi_private->baudclk_streams &= ~BIT(substream->stream); | |
917 | } | |
918 | ||
919 | return 0; | |
920 | } | |
921 | ||
85151461 MT |
922 | static int _fsl_ssi_set_dai_fmt(struct device *dev, |
923 | struct fsl_ssi_private *ssi_private, | |
924 | unsigned int fmt) | |
aafa85e7 | 925 | { |
43248122 | 926 | struct regmap *regs = ssi_private->regs; |
aafa85e7 | 927 | u32 strcr = 0, stcr, srcr, scr, mask; |
2b0db996 MP |
928 | u8 wm; |
929 | ||
171d683d MP |
930 | ssi_private->dai_fmt = fmt; |
931 | ||
d429d8e3 | 932 | if (fsl_ssi_is_i2s_master(ssi_private) && IS_ERR(ssi_private->baudclk)) { |
85151461 | 933 | dev_err(dev, "baudclk is missing which is necessary for master mode\n"); |
d429d8e3 MP |
934 | return -EINVAL; |
935 | } | |
936 | ||
2b0db996 | 937 | fsl_ssi_setup_reg_vals(ssi_private); |
aafa85e7 | 938 | |
43248122 MP |
939 | regmap_read(regs, CCSR_SSI_SCR, &scr); |
940 | scr &= ~(CCSR_SSI_SCR_SYN | CCSR_SSI_SCR_I2S_MODE_MASK); | |
50489479 | 941 | scr |= CCSR_SSI_SCR_SYNC_TX_FS; |
aafa85e7 NC |
942 | |
943 | mask = CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFDIR | CCSR_SSI_STCR_TXDIR | | |
944 | CCSR_SSI_STCR_TSCKP | CCSR_SSI_STCR_TFSI | CCSR_SSI_STCR_TFSL | | |
945 | CCSR_SSI_STCR_TEFS; | |
43248122 MP |
946 | regmap_read(regs, CCSR_SSI_STCR, &stcr); |
947 | regmap_read(regs, CCSR_SSI_SRCR, &srcr); | |
948 | stcr &= ~mask; | |
949 | srcr &= ~mask; | |
aafa85e7 | 950 | |
07a28dbe | 951 | ssi_private->i2s_mode = CCSR_SSI_SCR_NET; |
aafa85e7 NC |
952 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
953 | case SND_SOC_DAIFMT_I2S: | |
4f14f5c1 AS |
954 | regmap_update_bits(regs, CCSR_SSI_STCCR, |
955 | CCSR_SSI_SxCCR_DC_MASK, | |
956 | CCSR_SSI_SxCCR_DC(2)); | |
957 | regmap_update_bits(regs, CCSR_SSI_SRCCR, | |
958 | CCSR_SSI_SxCCR_DC_MASK, | |
959 | CCSR_SSI_SxCCR_DC(2)); | |
aafa85e7 | 960 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
cf4f7fc3 | 961 | case SND_SOC_DAIFMT_CBM_CFS: |
aafa85e7 | 962 | case SND_SOC_DAIFMT_CBS_CFS: |
07a28dbe | 963 | ssi_private->i2s_mode |= CCSR_SSI_SCR_I2S_MODE_MASTER; |
aafa85e7 NC |
964 | break; |
965 | case SND_SOC_DAIFMT_CBM_CFM: | |
07a28dbe | 966 | ssi_private->i2s_mode |= CCSR_SSI_SCR_I2S_MODE_SLAVE; |
aafa85e7 NC |
967 | break; |
968 | default: | |
969 | return -EINVAL; | |
970 | } | |
aafa85e7 NC |
971 | |
972 | /* Data on rising edge of bclk, frame low, 1clk before data */ | |
973 | strcr |= CCSR_SSI_STCR_TFSI | CCSR_SSI_STCR_TSCKP | | |
974 | CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TEFS; | |
975 | break; | |
976 | case SND_SOC_DAIFMT_LEFT_J: | |
977 | /* Data on rising edge of bclk, frame high */ | |
978 | strcr |= CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TSCKP; | |
979 | break; | |
980 | case SND_SOC_DAIFMT_DSP_A: | |
981 | /* Data on rising edge of bclk, frame high, 1clk before data */ | |
982 | strcr |= CCSR_SSI_STCR_TFSL | CCSR_SSI_STCR_TSCKP | | |
983 | CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TEFS; | |
984 | break; | |
985 | case SND_SOC_DAIFMT_DSP_B: | |
986 | /* Data on rising edge of bclk, frame high */ | |
987 | strcr |= CCSR_SSI_STCR_TFSL | CCSR_SSI_STCR_TSCKP | | |
988 | CCSR_SSI_STCR_TXBIT0; | |
989 | break; | |
2b0db996 | 990 | case SND_SOC_DAIFMT_AC97: |
07a28dbe | 991 | ssi_private->i2s_mode |= CCSR_SSI_SCR_I2S_MODE_NORMAL; |
2b0db996 | 992 | break; |
aafa85e7 NC |
993 | default: |
994 | return -EINVAL; | |
995 | } | |
2b0db996 | 996 | scr |= ssi_private->i2s_mode; |
aafa85e7 NC |
997 | |
998 | /* DAI clock inversion */ | |
999 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
1000 | case SND_SOC_DAIFMT_NB_NF: | |
1001 | /* Nothing to do for both normal cases */ | |
1002 | break; | |
1003 | case SND_SOC_DAIFMT_IB_NF: | |
1004 | /* Invert bit clock */ | |
1005 | strcr ^= CCSR_SSI_STCR_TSCKP; | |
1006 | break; | |
1007 | case SND_SOC_DAIFMT_NB_IF: | |
1008 | /* Invert frame clock */ | |
1009 | strcr ^= CCSR_SSI_STCR_TFSI; | |
1010 | break; | |
1011 | case SND_SOC_DAIFMT_IB_IF: | |
1012 | /* Invert both clocks */ | |
1013 | strcr ^= CCSR_SSI_STCR_TSCKP; | |
1014 | strcr ^= CCSR_SSI_STCR_TFSI; | |
1015 | break; | |
1016 | default: | |
1017 | return -EINVAL; | |
1018 | } | |
1019 | ||
1020 | /* DAI clock master masks */ | |
1021 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
1022 | case SND_SOC_DAIFMT_CBS_CFS: | |
1023 | strcr |= CCSR_SSI_STCR_TFDIR | CCSR_SSI_STCR_TXDIR; | |
1024 | scr |= CCSR_SSI_SCR_SYS_CLK_EN; | |
1025 | break; | |
1026 | case SND_SOC_DAIFMT_CBM_CFM: | |
1027 | scr &= ~CCSR_SSI_SCR_SYS_CLK_EN; | |
1028 | break; | |
cf4f7fc3 FF |
1029 | case SND_SOC_DAIFMT_CBM_CFS: |
1030 | strcr &= ~CCSR_SSI_STCR_TXDIR; | |
1031 | strcr |= CCSR_SSI_STCR_TFDIR; | |
1032 | scr &= ~CCSR_SSI_SCR_SYS_CLK_EN; | |
1033 | break; | |
aafa85e7 | 1034 | default: |
dce0332c MS |
1035 | if (!fsl_ssi_is_ac97(ssi_private)) |
1036 | return -EINVAL; | |
aafa85e7 NC |
1037 | } |
1038 | ||
1039 | stcr |= strcr; | |
1040 | srcr |= strcr; | |
1041 | ||
dce0332c MS |
1042 | if (ssi_private->cpu_dai_drv.symmetric_rates |
1043 | || fsl_ssi_is_ac97(ssi_private)) { | |
1044 | /* Need to clear RXDIR when using SYNC or AC97 mode */ | |
aafa85e7 NC |
1045 | srcr &= ~CCSR_SSI_SRCR_RXDIR; |
1046 | scr |= CCSR_SSI_SCR_SYN; | |
1047 | } | |
1048 | ||
43248122 MP |
1049 | regmap_write(regs, CCSR_SSI_STCR, stcr); |
1050 | regmap_write(regs, CCSR_SSI_SRCR, srcr); | |
1051 | regmap_write(regs, CCSR_SSI_SCR, scr); | |
aafa85e7 | 1052 | |
4ee437fb | 1053 | wm = ssi_private->fifo_watermark; |
2b0db996 | 1054 | |
43248122 MP |
1055 | regmap_write(regs, CCSR_SSI_SFCSR, |
1056 | CCSR_SSI_SFCSR_TFWM0(wm) | CCSR_SSI_SFCSR_RFWM0(wm) | | |
1057 | CCSR_SSI_SFCSR_TFWM1(wm) | CCSR_SSI_SFCSR_RFWM1(wm)); | |
2b0db996 MP |
1058 | |
1059 | if (ssi_private->use_dual_fifo) { | |
43248122 | 1060 | regmap_update_bits(regs, CCSR_SSI_SRCR, CCSR_SSI_SRCR_RFEN1, |
2b0db996 | 1061 | CCSR_SSI_SRCR_RFEN1); |
43248122 | 1062 | regmap_update_bits(regs, CCSR_SSI_STCR, CCSR_SSI_STCR_TFEN1, |
2b0db996 | 1063 | CCSR_SSI_STCR_TFEN1); |
43248122 | 1064 | regmap_update_bits(regs, CCSR_SSI_SCR, CCSR_SSI_SCR_TCH_EN, |
2b0db996 MP |
1065 | CCSR_SSI_SCR_TCH_EN); |
1066 | } | |
1067 | ||
5b64c173 | 1068 | if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_AC97) |
2b0db996 MP |
1069 | fsl_ssi_setup_ac97(ssi_private); |
1070 | ||
aafa85e7 | 1071 | return 0; |
85e59af2 MP |
1072 | |
1073 | } | |
1074 | ||
1075 | /** | |
1076 | * fsl_ssi_set_dai_fmt - configure Digital Audio Interface Format. | |
1077 | */ | |
1078 | static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) | |
1079 | { | |
1080 | struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(cpu_dai); | |
1081 | ||
c997a92a MS |
1082 | if (fsl_ssi_is_ac97(ssi_private)) |
1083 | return 0; | |
1084 | ||
85151461 | 1085 | return _fsl_ssi_set_dai_fmt(cpu_dai->dev, ssi_private, fmt); |
aafa85e7 NC |
1086 | } |
1087 | ||
aafa85e7 NC |
1088 | /** |
1089 | * fsl_ssi_set_dai_tdm_slot - set TDM slot number | |
1090 | * | |
1091 | * Note: This function can be only called when using SSI as DAI master | |
1092 | */ | |
1093 | static int fsl_ssi_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask, | |
1094 | u32 rx_mask, int slots, int slot_width) | |
1095 | { | |
1096 | struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(cpu_dai); | |
43248122 | 1097 | struct regmap *regs = ssi_private->regs; |
aafa85e7 NC |
1098 | u32 val; |
1099 | ||
b0a7043d NC |
1100 | /* The word length should be 8, 10, 12, 16, 18, 20, 22 or 24 */ |
1101 | if (slot_width & 1 || slot_width < 8 || slot_width > 24) { | |
1102 | dev_err(cpu_dai->dev, "invalid slot width: %d\n", slot_width); | |
1103 | return -EINVAL; | |
1104 | } | |
1105 | ||
aafa85e7 | 1106 | /* The slot number should be >= 2 if using Network mode or I2S mode */ |
43248122 MP |
1107 | regmap_read(regs, CCSR_SSI_SCR, &val); |
1108 | val &= CCSR_SSI_SCR_I2S_MODE_MASK | CCSR_SSI_SCR_NET; | |
aafa85e7 NC |
1109 | if (val && slots < 2) { |
1110 | dev_err(cpu_dai->dev, "slot number should be >= 2 in I2S or NET\n"); | |
1111 | return -EINVAL; | |
1112 | } | |
1113 | ||
43248122 | 1114 | regmap_update_bits(regs, CCSR_SSI_STCCR, CCSR_SSI_SxCCR_DC_MASK, |
aafa85e7 | 1115 | CCSR_SSI_SxCCR_DC(slots)); |
43248122 | 1116 | regmap_update_bits(regs, CCSR_SSI_SRCCR, CCSR_SSI_SxCCR_DC_MASK, |
aafa85e7 NC |
1117 | CCSR_SSI_SxCCR_DC(slots)); |
1118 | ||
1119 | /* The register SxMSKs needs SSI to provide essential clock due to | |
1120 | * hardware design. So we here temporarily enable SSI to set them. | |
1121 | */ | |
43248122 MP |
1122 | regmap_read(regs, CCSR_SSI_SCR, &val); |
1123 | val &= CCSR_SSI_SCR_SSIEN; | |
1124 | regmap_update_bits(regs, CCSR_SSI_SCR, CCSR_SSI_SCR_SSIEN, | |
1125 | CCSR_SSI_SCR_SSIEN); | |
aafa85e7 | 1126 | |
d0077aaf LPC |
1127 | regmap_write(regs, CCSR_SSI_STMSK, ~tx_mask); |
1128 | regmap_write(regs, CCSR_SSI_SRMSK, ~rx_mask); | |
aafa85e7 | 1129 | |
43248122 | 1130 | regmap_update_bits(regs, CCSR_SSI_SCR, CCSR_SSI_SCR_SSIEN, val); |
aafa85e7 | 1131 | |
b0a7043d NC |
1132 | ssi_private->slot_width = slot_width; |
1133 | ssi_private->slots = slots; | |
1134 | ||
aafa85e7 NC |
1135 | return 0; |
1136 | } | |
1137 | ||
17467f23 TT |
1138 | /** |
1139 | * fsl_ssi_trigger: start and stop the DMA transfer. | |
1140 | * | |
1141 | * This function is called by ALSA to start, stop, pause, and resume the DMA | |
1142 | * transfer of data. | |
1143 | * | |
1144 | * The DMA channel is in external master start and pause mode, which | |
1145 | * means the SSI completely controls the flow of data. | |
1146 | */ | |
dee89c4d MB |
1147 | static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, |
1148 | struct snd_soc_dai *dai) | |
17467f23 TT |
1149 | { |
1150 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 1151 | struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(rtd->cpu_dai); |
43248122 | 1152 | struct regmap *regs = ssi_private->regs; |
9b443e3d | 1153 | |
17467f23 TT |
1154 | switch (cmd) { |
1155 | case SNDRV_PCM_TRIGGER_START: | |
b20e53a8 | 1156 | case SNDRV_PCM_TRIGGER_RESUME: |
17467f23 | 1157 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
a4d11fe5 | 1158 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
6de83879 | 1159 | fsl_ssi_tx_config(ssi_private, true); |
a4d11fe5 | 1160 | else |
6de83879 | 1161 | fsl_ssi_rx_config(ssi_private, true); |
17467f23 TT |
1162 | break; |
1163 | ||
1164 | case SNDRV_PCM_TRIGGER_STOP: | |
b20e53a8 | 1165 | case SNDRV_PCM_TRIGGER_SUSPEND: |
17467f23 TT |
1166 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
1167 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
6de83879 | 1168 | fsl_ssi_tx_config(ssi_private, false); |
17467f23 | 1169 | else |
6de83879 | 1170 | fsl_ssi_rx_config(ssi_private, false); |
17467f23 TT |
1171 | break; |
1172 | ||
1173 | default: | |
1174 | return -EINVAL; | |
1175 | } | |
1176 | ||
171d683d | 1177 | if (fsl_ssi_is_ac97(ssi_private)) { |
a5a7ee7c | 1178 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
43248122 | 1179 | regmap_write(regs, CCSR_SSI_SOR, CCSR_SSI_SOR_TX_CLR); |
a5a7ee7c | 1180 | else |
43248122 | 1181 | regmap_write(regs, CCSR_SSI_SOR, CCSR_SSI_SOR_RX_CLR); |
a5a7ee7c | 1182 | } |
9b443e3d | 1183 | |
17467f23 TT |
1184 | return 0; |
1185 | } | |
1186 | ||
fc8ba7f9 LPC |
1187 | static int fsl_ssi_dai_probe(struct snd_soc_dai *dai) |
1188 | { | |
1189 | struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(dai); | |
1190 | ||
fcdbadef | 1191 | if (ssi_private->soc->imx && ssi_private->use_dma) { |
fc8ba7f9 LPC |
1192 | dai->playback_dma_data = &ssi_private->dma_params_tx; |
1193 | dai->capture_dma_data = &ssi_private->dma_params_rx; | |
1194 | } | |
1195 | ||
1196 | return 0; | |
1197 | } | |
1198 | ||
85e7652d | 1199 | static const struct snd_soc_dai_ops fsl_ssi_dai_ops = { |
6335d055 | 1200 | .startup = fsl_ssi_startup, |
f4a43cab | 1201 | .shutdown = fsl_ssi_shutdown, |
6335d055 | 1202 | .hw_params = fsl_ssi_hw_params, |
d429d8e3 | 1203 | .hw_free = fsl_ssi_hw_free, |
aafa85e7 | 1204 | .set_fmt = fsl_ssi_set_dai_fmt, |
aafa85e7 | 1205 | .set_tdm_slot = fsl_ssi_set_dai_tdm_slot, |
6335d055 | 1206 | .trigger = fsl_ssi_trigger, |
6335d055 EM |
1207 | }; |
1208 | ||
f0fba2ad LG |
1209 | /* Template for the CPU dai driver structure */ |
1210 | static struct snd_soc_dai_driver fsl_ssi_dai_template = { | |
fc8ba7f9 | 1211 | .probe = fsl_ssi_dai_probe, |
17467f23 | 1212 | .playback = { |
e3655004 | 1213 | .stream_name = "CPU-Playback", |
2924a998 | 1214 | .channels_min = 1, |
48a260ee | 1215 | .channels_max = 32, |
58055677 | 1216 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
17467f23 TT |
1217 | .formats = FSLSSI_I2S_FORMATS, |
1218 | }, | |
1219 | .capture = { | |
e3655004 | 1220 | .stream_name = "CPU-Capture", |
2924a998 | 1221 | .channels_min = 1, |
48a260ee | 1222 | .channels_max = 32, |
58055677 | 1223 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
17467f23 TT |
1224 | .formats = FSLSSI_I2S_FORMATS, |
1225 | }, | |
6335d055 | 1226 | .ops = &fsl_ssi_dai_ops, |
17467f23 TT |
1227 | }; |
1228 | ||
3580aa10 KM |
1229 | static const struct snd_soc_component_driver fsl_ssi_component = { |
1230 | .name = "fsl-ssi", | |
1231 | }; | |
1232 | ||
cd7f0295 | 1233 | static struct snd_soc_dai_driver fsl_ssi_ac97_dai = { |
bc263214 | 1234 | .bus_control = true, |
793e3e9e | 1235 | .probe = fsl_ssi_dai_probe, |
cd7f0295 MP |
1236 | .playback = { |
1237 | .stream_name = "AC97 Playback", | |
1238 | .channels_min = 2, | |
1239 | .channels_max = 2, | |
1240 | .rates = SNDRV_PCM_RATE_8000_48000, | |
1241 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
1242 | }, | |
1243 | .capture = { | |
1244 | .stream_name = "AC97 Capture", | |
1245 | .channels_min = 2, | |
1246 | .channels_max = 2, | |
1247 | .rates = SNDRV_PCM_RATE_48000, | |
1248 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
1249 | }, | |
a5a7ee7c | 1250 | .ops = &fsl_ssi_dai_ops, |
cd7f0295 MP |
1251 | }; |
1252 | ||
1253 | ||
1254 | static struct fsl_ssi_private *fsl_ac97_data; | |
1255 | ||
a851a2bb | 1256 | static void fsl_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg, |
cd7f0295 MP |
1257 | unsigned short val) |
1258 | { | |
43248122 | 1259 | struct regmap *regs = fsl_ac97_data->regs; |
cd7f0295 MP |
1260 | unsigned int lreg; |
1261 | unsigned int lval; | |
8277df3c | 1262 | int ret; |
cd7f0295 MP |
1263 | |
1264 | if (reg > 0x7f) | |
1265 | return; | |
1266 | ||
b880b805 MS |
1267 | mutex_lock(&fsl_ac97_data->ac97_reg_lock); |
1268 | ||
8277df3c MS |
1269 | ret = clk_prepare_enable(fsl_ac97_data->clk); |
1270 | if (ret) { | |
1271 | pr_err("ac97 write clk_prepare_enable failed: %d\n", | |
1272 | ret); | |
b880b805 | 1273 | goto ret_unlock; |
8277df3c | 1274 | } |
cd7f0295 MP |
1275 | |
1276 | lreg = reg << 12; | |
43248122 | 1277 | regmap_write(regs, CCSR_SSI_SACADD, lreg); |
cd7f0295 MP |
1278 | |
1279 | lval = val << 4; | |
43248122 | 1280 | regmap_write(regs, CCSR_SSI_SACDAT, lval); |
cd7f0295 | 1281 | |
43248122 | 1282 | regmap_update_bits(regs, CCSR_SSI_SACNT, CCSR_SSI_SACNT_RDWR_MASK, |
cd7f0295 MP |
1283 | CCSR_SSI_SACNT_WR); |
1284 | udelay(100); | |
8277df3c MS |
1285 | |
1286 | clk_disable_unprepare(fsl_ac97_data->clk); | |
b880b805 MS |
1287 | |
1288 | ret_unlock: | |
1289 | mutex_unlock(&fsl_ac97_data->ac97_reg_lock); | |
cd7f0295 MP |
1290 | } |
1291 | ||
a851a2bb | 1292 | static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97, |
cd7f0295 MP |
1293 | unsigned short reg) |
1294 | { | |
43248122 | 1295 | struct regmap *regs = fsl_ac97_data->regs; |
cd7f0295 | 1296 | |
b880b805 | 1297 | unsigned short val = 0; |
43248122 | 1298 | u32 reg_val; |
cd7f0295 | 1299 | unsigned int lreg; |
8277df3c MS |
1300 | int ret; |
1301 | ||
b880b805 MS |
1302 | mutex_lock(&fsl_ac97_data->ac97_reg_lock); |
1303 | ||
8277df3c MS |
1304 | ret = clk_prepare_enable(fsl_ac97_data->clk); |
1305 | if (ret) { | |
1306 | pr_err("ac97 read clk_prepare_enable failed: %d\n", | |
1307 | ret); | |
b880b805 | 1308 | goto ret_unlock; |
8277df3c | 1309 | } |
cd7f0295 MP |
1310 | |
1311 | lreg = (reg & 0x7f) << 12; | |
43248122 MP |
1312 | regmap_write(regs, CCSR_SSI_SACADD, lreg); |
1313 | regmap_update_bits(regs, CCSR_SSI_SACNT, CCSR_SSI_SACNT_RDWR_MASK, | |
cd7f0295 MP |
1314 | CCSR_SSI_SACNT_RD); |
1315 | ||
1316 | udelay(100); | |
1317 | ||
43248122 MP |
1318 | regmap_read(regs, CCSR_SSI_SACDAT, ®_val); |
1319 | val = (reg_val >> 4) & 0xffff; | |
cd7f0295 | 1320 | |
8277df3c MS |
1321 | clk_disable_unprepare(fsl_ac97_data->clk); |
1322 | ||
b880b805 MS |
1323 | ret_unlock: |
1324 | mutex_unlock(&fsl_ac97_data->ac97_reg_lock); | |
cd7f0295 MP |
1325 | return val; |
1326 | } | |
1327 | ||
1328 | static struct snd_ac97_bus_ops fsl_ssi_ac97_ops = { | |
1329 | .read = fsl_ssi_ac97_read, | |
1330 | .write = fsl_ssi_ac97_write, | |
1331 | }; | |
1332 | ||
17467f23 | 1333 | /** |
f0fba2ad | 1334 | * Make every character in a string lower-case |
17467f23 | 1335 | */ |
f0fba2ad LG |
1336 | static void make_lowercase(char *s) |
1337 | { | |
c6682fed FE |
1338 | if (!s) |
1339 | return; | |
1340 | for (; *s; s++) | |
1341 | *s = tolower(*s); | |
f0fba2ad LG |
1342 | } |
1343 | ||
49da09e2 | 1344 | static int fsl_ssi_imx_probe(struct platform_device *pdev, |
4d9b7926 | 1345 | struct fsl_ssi_private *ssi_private, void __iomem *iomem) |
49da09e2 MP |
1346 | { |
1347 | struct device_node *np = pdev->dev.of_node; | |
ed0f1604 | 1348 | u32 dmas[4]; |
49da09e2 MP |
1349 | int ret; |
1350 | ||
f4a43cab SW |
1351 | if (ssi_private->has_ipg_clk_name) |
1352 | ssi_private->clk = devm_clk_get(&pdev->dev, "ipg"); | |
1353 | else | |
1354 | ssi_private->clk = devm_clk_get(&pdev->dev, NULL); | |
49da09e2 MP |
1355 | if (IS_ERR(ssi_private->clk)) { |
1356 | ret = PTR_ERR(ssi_private->clk); | |
1357 | dev_err(&pdev->dev, "could not get clock: %d\n", ret); | |
1358 | return ret; | |
1359 | } | |
1360 | ||
f4a43cab SW |
1361 | if (!ssi_private->has_ipg_clk_name) { |
1362 | ret = clk_prepare_enable(ssi_private->clk); | |
1363 | if (ret) { | |
1364 | dev_err(&pdev->dev, "clk_prepare_enable failed: %d\n", ret); | |
1365 | return ret; | |
1366 | } | |
49da09e2 MP |
1367 | } |
1368 | ||
dcfcf2c2 | 1369 | /* For those SLAVE implementations, we ignore non-baudclk cases |
49da09e2 MP |
1370 | * and, instead, abandon MASTER mode that needs baud clock. |
1371 | */ | |
1372 | ssi_private->baudclk = devm_clk_get(&pdev->dev, "baud"); | |
1373 | if (IS_ERR(ssi_private->baudclk)) | |
1374 | dev_dbg(&pdev->dev, "could not get baud clock: %ld\n", | |
1375 | PTR_ERR(ssi_private->baudclk)); | |
49da09e2 | 1376 | |
4ee437fb CC |
1377 | ssi_private->dma_params_tx.maxburst = ssi_private->dma_maxburst; |
1378 | ssi_private->dma_params_rx.maxburst = ssi_private->dma_maxburst; | |
43248122 MP |
1379 | ssi_private->dma_params_tx.addr = ssi_private->ssi_phys + CCSR_SSI_STX0; |
1380 | ssi_private->dma_params_rx.addr = ssi_private->ssi_phys + CCSR_SSI_SRX0; | |
49da09e2 | 1381 | |
90aff15b | 1382 | ret = of_property_read_u32_array(np, "dmas", dmas, 4); |
ed0f1604 | 1383 | if (ssi_private->use_dma && !ret && dmas[2] == IMX_DMATYPE_SSI_DUAL) { |
49da09e2 MP |
1384 | ssi_private->use_dual_fifo = true; |
1385 | /* When using dual fifo mode, we need to keep watermark | |
1386 | * as even numbers due to dma script limitation. | |
1387 | */ | |
1388 | ssi_private->dma_params_tx.maxburst &= ~0x1; | |
1389 | ssi_private->dma_params_rx.maxburst &= ~0x1; | |
1390 | } | |
1391 | ||
4d9b7926 MP |
1392 | if (!ssi_private->use_dma) { |
1393 | ||
1394 | /* | |
1395 | * Some boards use an incompatible codec. To get it | |
1396 | * working, we are using imx-fiq-pcm-audio, that | |
1397 | * can handle those codecs. DMA is not possible in this | |
1398 | * situation. | |
1399 | */ | |
1400 | ||
1401 | ssi_private->fiq_params.irq = ssi_private->irq; | |
1402 | ssi_private->fiq_params.base = iomem; | |
1403 | ssi_private->fiq_params.dma_params_rx = | |
1404 | &ssi_private->dma_params_rx; | |
1405 | ssi_private->fiq_params.dma_params_tx = | |
1406 | &ssi_private->dma_params_tx; | |
1407 | ||
1408 | ret = imx_pcm_fiq_init(pdev, &ssi_private->fiq_params); | |
1409 | if (ret) | |
1410 | goto error_pcm; | |
1411 | } else { | |
0d69e0dd | 1412 | ret = imx_pcm_dma_init(pdev, IMX_SSI_DMABUF_SIZE); |
4d9b7926 MP |
1413 | if (ret) |
1414 | goto error_pcm; | |
1415 | } | |
1416 | ||
49da09e2 | 1417 | return 0; |
4d9b7926 MP |
1418 | |
1419 | error_pcm: | |
4d9b7926 | 1420 | |
f4a43cab SW |
1421 | if (!ssi_private->has_ipg_clk_name) |
1422 | clk_disable_unprepare(ssi_private->clk); | |
4d9b7926 | 1423 | return ret; |
49da09e2 MP |
1424 | } |
1425 | ||
1426 | static void fsl_ssi_imx_clean(struct platform_device *pdev, | |
1427 | struct fsl_ssi_private *ssi_private) | |
1428 | { | |
4d9b7926 MP |
1429 | if (!ssi_private->use_dma) |
1430 | imx_pcm_fiq_exit(pdev); | |
f4a43cab SW |
1431 | if (!ssi_private->has_ipg_clk_name) |
1432 | clk_disable_unprepare(ssi_private->clk); | |
49da09e2 MP |
1433 | } |
1434 | ||
a0a3d518 | 1435 | static int fsl_ssi_probe(struct platform_device *pdev) |
17467f23 | 1436 | { |
17467f23 TT |
1437 | struct fsl_ssi_private *ssi_private; |
1438 | int ret = 0; | |
38fec727 | 1439 | struct device_node *np = pdev->dev.of_node; |
c1953bfe | 1440 | const struct of_device_id *of_id; |
f0fba2ad | 1441 | const char *p, *sprop; |
8e9d8690 | 1442 | const uint32_t *iprop; |
ca264189 | 1443 | struct resource *res; |
43248122 | 1444 | void __iomem *iomem; |
f0fba2ad | 1445 | char name[64]; |
6139b1b1 | 1446 | struct regmap_config regconfig = fsl_ssi_regconfig; |
17467f23 | 1447 | |
c1953bfe | 1448 | of_id = of_match_device(fsl_ssi_ids, &pdev->dev); |
fcdbadef | 1449 | if (!of_id || !of_id->data) |
c1953bfe | 1450 | return -EINVAL; |
c1953bfe | 1451 | |
2a1d102d MP |
1452 | ssi_private = devm_kzalloc(&pdev->dev, sizeof(*ssi_private), |
1453 | GFP_KERNEL); | |
443be77e | 1454 | if (!ssi_private) |
f0fba2ad | 1455 | return -ENOMEM; |
17467f23 | 1456 | |
fcdbadef | 1457 | ssi_private->soc = of_id->data; |
0096b693 | 1458 | ssi_private->dev = &pdev->dev; |
fcdbadef | 1459 | |
85e59af2 MP |
1460 | sprop = of_get_property(np, "fsl,mode", NULL); |
1461 | if (sprop) { | |
1462 | if (!strcmp(sprop, "ac97-slave")) | |
1463 | ssi_private->dai_fmt = SND_SOC_DAIFMT_AC97; | |
85e59af2 MP |
1464 | } |
1465 | ||
de623ece MP |
1466 | ssi_private->use_dma = !of_property_read_bool(np, |
1467 | "fsl,fiq-stream-filter"); | |
1468 | ||
85e59af2 | 1469 | if (fsl_ssi_is_ac97(ssi_private)) { |
cd7f0295 MP |
1470 | memcpy(&ssi_private->cpu_dai_drv, &fsl_ssi_ac97_dai, |
1471 | sizeof(fsl_ssi_ac97_dai)); | |
1472 | ||
1473 | fsl_ac97_data = ssi_private; | |
cd7f0295 MP |
1474 | } else { |
1475 | /* Initialize this copy of the CPU DAI driver structure */ | |
1476 | memcpy(&ssi_private->cpu_dai_drv, &fsl_ssi_dai_template, | |
1477 | sizeof(fsl_ssi_dai_template)); | |
1478 | } | |
2a1d102d | 1479 | ssi_private->cpu_dai_drv.name = dev_name(&pdev->dev); |
f0fba2ad | 1480 | |
ca264189 FE |
1481 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1482 | iomem = devm_ioremap_resource(&pdev->dev, res); | |
1483 | if (IS_ERR(iomem)) | |
1484 | return PTR_ERR(iomem); | |
1485 | ssi_private->ssi_phys = res->start; | |
43248122 | 1486 | |
6139b1b1 MS |
1487 | if (ssi_private->soc->imx21regs) { |
1488 | /* | |
1489 | * According to datasheet imx21-class SSI | |
1490 | * don't have SACC{ST,EN,DIS} regs. | |
1491 | */ | |
1492 | regconfig.max_register = CCSR_SSI_SRMSK; | |
f26b3b2a MB |
1493 | regconfig.num_reg_defaults_raw = |
1494 | CCSR_SSI_SRMSK / sizeof(uint32_t) + 1; | |
6139b1b1 MS |
1495 | } |
1496 | ||
f4a43cab SW |
1497 | ret = of_property_match_string(np, "clock-names", "ipg"); |
1498 | if (ret < 0) { | |
1499 | ssi_private->has_ipg_clk_name = false; | |
1500 | ssi_private->regs = devm_regmap_init_mmio(&pdev->dev, iomem, | |
6139b1b1 | 1501 | ®config); |
f4a43cab SW |
1502 | } else { |
1503 | ssi_private->has_ipg_clk_name = true; | |
1504 | ssi_private->regs = devm_regmap_init_mmio_clk(&pdev->dev, | |
6139b1b1 | 1505 | "ipg", iomem, ®config); |
f4a43cab | 1506 | } |
43248122 MP |
1507 | if (IS_ERR(ssi_private->regs)) { |
1508 | dev_err(&pdev->dev, "Failed to init register map\n"); | |
1509 | return PTR_ERR(ssi_private->regs); | |
1510 | } | |
1fab6caf | 1511 | |
2ffa5310 | 1512 | ssi_private->irq = platform_get_irq(pdev, 0); |
28ecc0b6 | 1513 | if (ssi_private->irq < 0) { |
0c123250 | 1514 | dev_err(&pdev->dev, "no irq for node %s\n", pdev->name); |
64aa5f58 | 1515 | return ssi_private->irq; |
1fab6caf TT |
1516 | } |
1517 | ||
f0fba2ad | 1518 | /* Are the RX and the TX clocks locked? */ |
07a9483a | 1519 | if (!of_find_property(np, "fsl,ssi-asynchronous", NULL)) { |
06cb3736 MS |
1520 | if (!fsl_ssi_is_ac97(ssi_private)) |
1521 | ssi_private->cpu_dai_drv.symmetric_rates = 1; | |
1522 | ||
07a9483a NC |
1523 | ssi_private->cpu_dai_drv.symmetric_channels = 1; |
1524 | ssi_private->cpu_dai_drv.symmetric_samplebits = 1; | |
1525 | } | |
17467f23 | 1526 | |
8e9d8690 TT |
1527 | /* Determine the FIFO depth. */ |
1528 | iprop = of_get_property(np, "fsl,fifo-depth", NULL); | |
1529 | if (iprop) | |
147dfe90 | 1530 | ssi_private->fifo_depth = be32_to_cpup(iprop); |
8e9d8690 TT |
1531 | else |
1532 | /* Older 8610 DTs didn't have the fifo-depth property */ | |
1533 | ssi_private->fifo_depth = 8; | |
1534 | ||
4ee437fb CC |
1535 | /* |
1536 | * Set the watermark for transmit FIFO 0 and receive FIFO 0. We don't | |
1537 | * use FIFO 1 but set the watermark appropriately nontheless. | |
1538 | * We program the transmit water to signal a DMA transfer | |
1539 | * if there are N elements left in the FIFO. For chips with 15-deep | |
1540 | * FIFOs, set watermark to 8. This allows the SSI to operate at a | |
1541 | * high data rate without channel slipping. Behavior is unchanged | |
1542 | * for the older chips with a fifo depth of only 8. A value of 4 | |
1543 | * might be appropriate for the older chips, but is left at | |
1544 | * fifo_depth-2 until sombody has a chance to test. | |
1545 | * | |
1546 | * We set the watermark on the same level as the DMA burstsize. For | |
1547 | * fiq it is probably better to use the biggest possible watermark | |
1548 | * size. | |
1549 | */ | |
1550 | switch (ssi_private->fifo_depth) { | |
1551 | case 15: | |
1552 | /* | |
1553 | * 2 samples is not enough when running at high data | |
1554 | * rates (like 48kHz @ 16 bits/channel, 16 channels) | |
1555 | * 8 seems to split things evenly and leave enough time | |
1556 | * for the DMA to fill the FIFO before it's over/under | |
1557 | * run. | |
1558 | */ | |
1559 | ssi_private->fifo_watermark = 8; | |
1560 | ssi_private->dma_maxburst = 8; | |
1561 | break; | |
1562 | case 8: | |
1563 | default: | |
1564 | /* | |
1565 | * maintain old behavior for older chips. | |
1566 | * Keeping it the same because I don't have an older | |
1567 | * board to test with. | |
1568 | * I suspect this could be changed to be something to | |
1569 | * leave some more space in the fifo. | |
1570 | */ | |
1571 | ssi_private->fifo_watermark = ssi_private->fifo_depth - 2; | |
1572 | ssi_private->dma_maxburst = ssi_private->fifo_depth - 2; | |
1573 | break; | |
1574 | } | |
1575 | ||
4d9b7926 MP |
1576 | dev_set_drvdata(&pdev->dev, ssi_private); |
1577 | ||
fcdbadef | 1578 | if (ssi_private->soc->imx) { |
43248122 | 1579 | ret = fsl_ssi_imx_probe(pdev, ssi_private, iomem); |
49da09e2 | 1580 | if (ret) |
2ffa5310 | 1581 | return ret; |
0888efd1 MP |
1582 | } |
1583 | ||
695b78b5 | 1584 | if (fsl_ssi_is_ac97(ssi_private)) { |
b880b805 | 1585 | mutex_init(&ssi_private->ac97_reg_lock); |
695b78b5 MS |
1586 | ret = snd_soc_set_ac97_ops_of_reset(&fsl_ssi_ac97_ops, pdev); |
1587 | if (ret) { | |
1588 | dev_err(&pdev->dev, "could not set AC'97 ops\n"); | |
1589 | goto error_ac97_ops; | |
1590 | } | |
1591 | } | |
1592 | ||
299e7e97 FE |
1593 | ret = devm_snd_soc_register_component(&pdev->dev, &fsl_ssi_component, |
1594 | &ssi_private->cpu_dai_drv, 1); | |
4d9b7926 MP |
1595 | if (ret) { |
1596 | dev_err(&pdev->dev, "failed to register DAI: %d\n", ret); | |
1597 | goto error_asoc_register; | |
1598 | } | |
1599 | ||
0888efd1 | 1600 | if (ssi_private->use_dma) { |
f0377086 | 1601 | ret = devm_request_irq(&pdev->dev, ssi_private->irq, |
171d683d | 1602 | fsl_ssi_isr, 0, dev_name(&pdev->dev), |
f0377086 MG |
1603 | ssi_private); |
1604 | if (ret < 0) { | |
1605 | dev_err(&pdev->dev, "could not claim irq %u\n", | |
1606 | ssi_private->irq); | |
299e7e97 | 1607 | goto error_asoc_register; |
f0377086 | 1608 | } |
09ce1111 SG |
1609 | } |
1610 | ||
f138e621 | 1611 | ret = fsl_ssi_debugfs_create(&ssi_private->dbg_stats, &pdev->dev); |
9368acc4 | 1612 | if (ret) |
299e7e97 | 1613 | goto error_asoc_register; |
09ce1111 SG |
1614 | |
1615 | /* | |
1616 | * If codec-handle property is missing from SSI node, we assume | |
1617 | * that the machine driver uses new binding which does not require | |
1618 | * SSI driver to trigger machine driver's probe. | |
1619 | */ | |
171d683d | 1620 | if (!of_get_property(np, "codec-handle", NULL)) |
09ce1111 | 1621 | goto done; |
09ce1111 | 1622 | |
f0fba2ad | 1623 | /* Trigger the machine driver's probe function. The platform driver |
2b81ec69 | 1624 | * name of the machine driver is taken from /compatible property of the |
f0fba2ad LG |
1625 | * device tree. We also pass the address of the CPU DAI driver |
1626 | * structure. | |
1627 | */ | |
2b81ec69 SG |
1628 | sprop = of_get_property(of_find_node_by_path("/"), "compatible", NULL); |
1629 | /* Sometimes the compatible name has a "fsl," prefix, so we strip it. */ | |
f0fba2ad LG |
1630 | p = strrchr(sprop, ','); |
1631 | if (p) | |
1632 | sprop = p + 1; | |
1633 | snprintf(name, sizeof(name), "snd-soc-%s", sprop); | |
1634 | make_lowercase(name); | |
1635 | ||
1636 | ssi_private->pdev = | |
38fec727 | 1637 | platform_device_register_data(&pdev->dev, name, 0, NULL, 0); |
f0fba2ad LG |
1638 | if (IS_ERR(ssi_private->pdev)) { |
1639 | ret = PTR_ERR(ssi_private->pdev); | |
38fec727 | 1640 | dev_err(&pdev->dev, "failed to register platform: %d\n", ret); |
4d9b7926 | 1641 | goto error_sound_card; |
3f4b783c | 1642 | } |
17467f23 | 1643 | |
09ce1111 | 1644 | done: |
85e59af2 | 1645 | if (ssi_private->dai_fmt) |
85151461 MT |
1646 | _fsl_ssi_set_dai_fmt(&pdev->dev, ssi_private, |
1647 | ssi_private->dai_fmt); | |
85e59af2 | 1648 | |
8ed0c842 MS |
1649 | if (fsl_ssi_is_ac97(ssi_private)) { |
1650 | u32 ssi_idx; | |
1651 | ||
1652 | ret = of_property_read_u32(np, "cell-index", &ssi_idx); | |
1653 | if (ret) { | |
1654 | dev_err(&pdev->dev, "cannot get SSI index property\n"); | |
1655 | goto error_sound_card; | |
1656 | } | |
1657 | ||
1658 | ssi_private->pdev = | |
1659 | platform_device_register_data(NULL, | |
1660 | "ac97-codec", ssi_idx, NULL, 0); | |
1661 | if (IS_ERR(ssi_private->pdev)) { | |
1662 | ret = PTR_ERR(ssi_private->pdev); | |
1663 | dev_err(&pdev->dev, | |
1664 | "failed to register AC97 codec platform: %d\n", | |
1665 | ret); | |
1666 | goto error_sound_card; | |
1667 | } | |
1668 | } | |
1669 | ||
f0fba2ad | 1670 | return 0; |
87a0632b | 1671 | |
4d9b7926 | 1672 | error_sound_card: |
f138e621 | 1673 | fsl_ssi_debugfs_remove(&ssi_private->dbg_stats); |
9368acc4 | 1674 | |
4d9b7926 | 1675 | error_asoc_register: |
695b78b5 MS |
1676 | if (fsl_ssi_is_ac97(ssi_private)) |
1677 | snd_soc_set_ac97_ops(NULL); | |
1678 | ||
1679 | error_ac97_ops: | |
b880b805 MS |
1680 | if (fsl_ssi_is_ac97(ssi_private)) |
1681 | mutex_destroy(&ssi_private->ac97_reg_lock); | |
1682 | ||
fcdbadef | 1683 | if (ssi_private->soc->imx) |
49da09e2 | 1684 | fsl_ssi_imx_clean(pdev, ssi_private); |
1fab6caf | 1685 | |
87a0632b | 1686 | return ret; |
17467f23 | 1687 | } |
17467f23 | 1688 | |
38fec727 | 1689 | static int fsl_ssi_remove(struct platform_device *pdev) |
17467f23 | 1690 | { |
38fec727 | 1691 | struct fsl_ssi_private *ssi_private = dev_get_drvdata(&pdev->dev); |
17467f23 | 1692 | |
f138e621 | 1693 | fsl_ssi_debugfs_remove(&ssi_private->dbg_stats); |
9368acc4 | 1694 | |
171d683d | 1695 | if (ssi_private->pdev) |
09ce1111 | 1696 | platform_device_unregister(ssi_private->pdev); |
49da09e2 | 1697 | |
fcdbadef | 1698 | if (ssi_private->soc->imx) |
49da09e2 MP |
1699 | fsl_ssi_imx_clean(pdev, ssi_private); |
1700 | ||
b880b805 | 1701 | if (fsl_ssi_is_ac97(ssi_private)) { |
04143d61 | 1702 | snd_soc_set_ac97_ops(NULL); |
b880b805 MS |
1703 | mutex_destroy(&ssi_private->ac97_reg_lock); |
1704 | } | |
04143d61 | 1705 | |
f0fba2ad | 1706 | return 0; |
17467f23 | 1707 | } |
f0fba2ad | 1708 | |
05cf2379 ZW |
1709 | #ifdef CONFIG_PM_SLEEP |
1710 | static int fsl_ssi_suspend(struct device *dev) | |
1711 | { | |
1712 | struct fsl_ssi_private *ssi_private = dev_get_drvdata(dev); | |
1713 | struct regmap *regs = ssi_private->regs; | |
1714 | ||
1715 | regmap_read(regs, CCSR_SSI_SFCSR, | |
1716 | &ssi_private->regcache_sfcsr); | |
3f1c241f MS |
1717 | regmap_read(regs, CCSR_SSI_SACNT, |
1718 | &ssi_private->regcache_sacnt); | |
05cf2379 ZW |
1719 | |
1720 | regcache_cache_only(regs, true); | |
1721 | regcache_mark_dirty(regs); | |
1722 | ||
1723 | return 0; | |
1724 | } | |
1725 | ||
1726 | static int fsl_ssi_resume(struct device *dev) | |
1727 | { | |
1728 | struct fsl_ssi_private *ssi_private = dev_get_drvdata(dev); | |
1729 | struct regmap *regs = ssi_private->regs; | |
1730 | ||
1731 | regcache_cache_only(regs, false); | |
1732 | ||
1733 | regmap_update_bits(regs, CCSR_SSI_SFCSR, | |
1734 | CCSR_SSI_SFCSR_RFWM1_MASK | CCSR_SSI_SFCSR_TFWM1_MASK | | |
1735 | CCSR_SSI_SFCSR_RFWM0_MASK | CCSR_SSI_SFCSR_TFWM0_MASK, | |
1736 | ssi_private->regcache_sfcsr); | |
3f1c241f MS |
1737 | regmap_write(regs, CCSR_SSI_SACNT, |
1738 | ssi_private->regcache_sacnt); | |
05cf2379 ZW |
1739 | |
1740 | return regcache_sync(regs); | |
1741 | } | |
1742 | #endif /* CONFIG_PM_SLEEP */ | |
1743 | ||
1744 | static const struct dev_pm_ops fsl_ssi_pm = { | |
1745 | SET_SYSTEM_SLEEP_PM_OPS(fsl_ssi_suspend, fsl_ssi_resume) | |
1746 | }; | |
1747 | ||
f07eb223 | 1748 | static struct platform_driver fsl_ssi_driver = { |
f0fba2ad LG |
1749 | .driver = { |
1750 | .name = "fsl-ssi-dai", | |
f0fba2ad | 1751 | .of_match_table = fsl_ssi_ids, |
05cf2379 | 1752 | .pm = &fsl_ssi_pm, |
f0fba2ad LG |
1753 | }, |
1754 | .probe = fsl_ssi_probe, | |
1755 | .remove = fsl_ssi_remove, | |
1756 | }; | |
17467f23 | 1757 | |
ba0a7e02 | 1758 | module_platform_driver(fsl_ssi_driver); |
a454dad1 | 1759 | |
f3142807 | 1760 | MODULE_ALIAS("platform:fsl-ssi-dai"); |
17467f23 TT |
1761 | MODULE_AUTHOR("Timur Tabi <timur@freescale.com>"); |
1762 | MODULE_DESCRIPTION("Freescale Synchronous Serial Interface (SSI) ASoC Driver"); | |
f0fba2ad | 1763 | MODULE_LICENSE("GPL v2"); |