Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 1 | /* |
| 2 | * ALSA SoC Synopsys I2S Audio Layer |
| 3 | * |
Rajeev Kumar | 22a4adf | 2013-06-11 09:29:08 +0530 | [diff] [blame] | 4 | * sound/soc/dwc/designware_i2s.c |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 5 | * |
| 6 | * Copyright (C) 2010 ST Microelectronics |
Rajeev Kumar | 9a302c3 | 2014-09-05 16:47:04 +0530 | [diff] [blame] | 7 | * Rajeev Kumar <rajeevkumar.linux@gmail.com> |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 8 | * |
| 9 | * This file is licensed under the terms of the GNU General Public |
| 10 | * License version 2. This program is licensed "as is" without any |
| 11 | * warranty of any kind, whether express or implied. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/clk.h> |
| 15 | #include <linux/device.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/io.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <sound/designware_i2s.h> |
| 22 | #include <sound/pcm.h> |
| 23 | #include <sound/pcm_params.h> |
| 24 | #include <sound/soc.h> |
| 25 | |
| 26 | /* common register for all channel */ |
| 27 | #define IER 0x000 |
| 28 | #define IRER 0x004 |
| 29 | #define ITER 0x008 |
| 30 | #define CER 0x00C |
| 31 | #define CCR 0x010 |
| 32 | #define RXFFR 0x014 |
| 33 | #define TXFFR 0x018 |
| 34 | |
| 35 | /* I2STxRxRegisters for all channels */ |
| 36 | #define LRBR_LTHR(x) (0x40 * x + 0x020) |
| 37 | #define RRBR_RTHR(x) (0x40 * x + 0x024) |
| 38 | #define RER(x) (0x40 * x + 0x028) |
| 39 | #define TER(x) (0x40 * x + 0x02C) |
| 40 | #define RCR(x) (0x40 * x + 0x030) |
| 41 | #define TCR(x) (0x40 * x + 0x034) |
| 42 | #define ISR(x) (0x40 * x + 0x038) |
| 43 | #define IMR(x) (0x40 * x + 0x03C) |
| 44 | #define ROR(x) (0x40 * x + 0x040) |
| 45 | #define TOR(x) (0x40 * x + 0x044) |
| 46 | #define RFCR(x) (0x40 * x + 0x048) |
| 47 | #define TFCR(x) (0x40 * x + 0x04C) |
| 48 | #define RFF(x) (0x40 * x + 0x050) |
| 49 | #define TFF(x) (0x40 * x + 0x054) |
| 50 | |
| 51 | /* I2SCOMPRegisters */ |
| 52 | #define I2S_COMP_PARAM_2 0x01F0 |
| 53 | #define I2S_COMP_PARAM_1 0x01F4 |
| 54 | #define I2S_COMP_VERSION 0x01F8 |
| 55 | #define I2S_COMP_TYPE 0x01FC |
| 56 | |
| 57 | #define MAX_CHANNEL_NUM 8 |
| 58 | #define MIN_CHANNEL_NUM 2 |
| 59 | |
| 60 | struct dw_i2s_dev { |
| 61 | void __iomem *i2s_base; |
| 62 | struct clk *clk; |
| 63 | int active; |
| 64 | unsigned int capability; |
| 65 | struct device *dev; |
| 66 | |
| 67 | /* data related to DMA transfers b/w i2s and DMAC */ |
| 68 | struct i2s_dma_data play_dma_data; |
| 69 | struct i2s_dma_data capture_dma_data; |
| 70 | struct i2s_clk_config_data config; |
| 71 | int (*i2s_clk_cfg)(struct i2s_clk_config_data *config); |
| 72 | }; |
| 73 | |
Mark Brown | 6b4a21b | 2012-06-28 13:11:47 +0100 | [diff] [blame] | 74 | static inline void i2s_write_reg(void __iomem *io_base, int reg, u32 val) |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 75 | { |
| 76 | writel(val, io_base + reg); |
| 77 | } |
| 78 | |
Mark Brown | 6b4a21b | 2012-06-28 13:11:47 +0100 | [diff] [blame] | 79 | static inline u32 i2s_read_reg(void __iomem *io_base, int reg) |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 80 | { |
| 81 | return readl(io_base + reg); |
| 82 | } |
| 83 | |
| 84 | static inline void i2s_disable_channels(struct dw_i2s_dev *dev, u32 stream) |
| 85 | { |
| 86 | u32 i = 0; |
| 87 | |
| 88 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 89 | for (i = 0; i < 4; i++) |
| 90 | i2s_write_reg(dev->i2s_base, TER(i), 0); |
| 91 | } else { |
| 92 | for (i = 0; i < 4; i++) |
| 93 | i2s_write_reg(dev->i2s_base, RER(i), 0); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream) |
| 98 | { |
| 99 | u32 i = 0; |
| 100 | |
| 101 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 102 | for (i = 0; i < 4; i++) |
| 103 | i2s_write_reg(dev->i2s_base, TOR(i), 0); |
| 104 | } else { |
| 105 | for (i = 0; i < 4; i++) |
| 106 | i2s_write_reg(dev->i2s_base, ROR(i), 0); |
| 107 | } |
| 108 | } |
| 109 | |
Mark Brown | 1520ffd | 2012-07-04 19:04:11 +0100 | [diff] [blame] | 110 | static void i2s_start(struct dw_i2s_dev *dev, |
| 111 | struct snd_pcm_substream *substream) |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 112 | { |
| 113 | |
| 114 | i2s_write_reg(dev->i2s_base, IER, 1); |
| 115 | |
| 116 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 117 | i2s_write_reg(dev->i2s_base, ITER, 1); |
| 118 | else |
| 119 | i2s_write_reg(dev->i2s_base, IRER, 1); |
| 120 | |
| 121 | i2s_write_reg(dev->i2s_base, CER, 1); |
| 122 | } |
| 123 | |
| 124 | static void i2s_stop(struct dw_i2s_dev *dev, |
| 125 | struct snd_pcm_substream *substream) |
| 126 | { |
| 127 | u32 i = 0, irq; |
| 128 | |
| 129 | i2s_clear_irqs(dev, substream->stream); |
| 130 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 131 | i2s_write_reg(dev->i2s_base, ITER, 0); |
| 132 | |
| 133 | for (i = 0; i < 4; i++) { |
| 134 | irq = i2s_read_reg(dev->i2s_base, IMR(i)); |
| 135 | i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30); |
| 136 | } |
| 137 | } else { |
| 138 | i2s_write_reg(dev->i2s_base, IRER, 0); |
| 139 | |
| 140 | for (i = 0; i < 4; i++) { |
| 141 | irq = i2s_read_reg(dev->i2s_base, IMR(i)); |
| 142 | i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | if (!dev->active) { |
| 147 | i2s_write_reg(dev->i2s_base, CER, 0); |
| 148 | i2s_write_reg(dev->i2s_base, IER, 0); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | static int dw_i2s_startup(struct snd_pcm_substream *substream, |
| 153 | struct snd_soc_dai *cpu_dai) |
| 154 | { |
| 155 | struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); |
| 156 | struct i2s_dma_data *dma_data = NULL; |
| 157 | |
| 158 | if (!(dev->capability & DWC_I2S_RECORD) && |
| 159 | (substream->stream == SNDRV_PCM_STREAM_CAPTURE)) |
| 160 | return -EINVAL; |
| 161 | |
| 162 | if (!(dev->capability & DWC_I2S_PLAY) && |
| 163 | (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)) |
| 164 | return -EINVAL; |
| 165 | |
| 166 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 167 | dma_data = &dev->play_dma_data; |
| 168 | else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
| 169 | dma_data = &dev->capture_dma_data; |
| 170 | |
| 171 | snd_soc_dai_set_dma_data(cpu_dai, substream, (void *)dma_data); |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static int dw_i2s_hw_params(struct snd_pcm_substream *substream, |
| 177 | struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) |
| 178 | { |
| 179 | struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); |
| 180 | struct i2s_clk_config_data *config = &dev->config; |
| 181 | u32 ccr, xfer_resolution, ch_reg, irq; |
| 182 | int ret; |
| 183 | |
| 184 | switch (params_format(params)) { |
| 185 | case SNDRV_PCM_FORMAT_S16_LE: |
| 186 | config->data_width = 16; |
| 187 | ccr = 0x00; |
| 188 | xfer_resolution = 0x02; |
| 189 | break; |
| 190 | |
| 191 | case SNDRV_PCM_FORMAT_S24_LE: |
| 192 | config->data_width = 24; |
| 193 | ccr = 0x08; |
| 194 | xfer_resolution = 0x04; |
| 195 | break; |
| 196 | |
| 197 | case SNDRV_PCM_FORMAT_S32_LE: |
| 198 | config->data_width = 32; |
| 199 | ccr = 0x10; |
| 200 | xfer_resolution = 0x05; |
| 201 | break; |
| 202 | |
| 203 | default: |
| 204 | dev_err(dev->dev, "designware-i2s: unsuppted PCM fmt"); |
| 205 | return -EINVAL; |
| 206 | } |
| 207 | |
| 208 | config->chan_nr = params_channels(params); |
| 209 | |
| 210 | switch (config->chan_nr) { |
| 211 | case EIGHT_CHANNEL_SUPPORT: |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 212 | case SIX_CHANNEL_SUPPORT: |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 213 | case FOUR_CHANNEL_SUPPORT: |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 214 | case TWO_CHANNEL_SUPPORT: |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 215 | break; |
| 216 | default: |
| 217 | dev_err(dev->dev, "channel not supported\n"); |
Dan Carpenter | 0099d24 | 2013-01-25 09:43:43 +0300 | [diff] [blame] | 218 | return -EINVAL; |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | i2s_disable_channels(dev, substream->stream); |
| 222 | |
Andrew Jackson | db2c1f9 | 2014-12-19 16:18:06 +0000 | [diff] [blame] | 223 | for (ch_reg = 0; ch_reg < (config->chan_nr / 2); ch_reg++) { |
| 224 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 225 | i2s_write_reg(dev->i2s_base, TCR(ch_reg), |
| 226 | xfer_resolution); |
| 227 | i2s_write_reg(dev->i2s_base, TFCR(ch_reg), 0x02); |
| 228 | irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg)); |
| 229 | i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x30); |
| 230 | i2s_write_reg(dev->i2s_base, TER(ch_reg), 1); |
| 231 | } else { |
| 232 | i2s_write_reg(dev->i2s_base, RCR(ch_reg), |
| 233 | xfer_resolution); |
| 234 | i2s_write_reg(dev->i2s_base, RFCR(ch_reg), 0x07); |
| 235 | irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg)); |
| 236 | i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x03); |
| 237 | i2s_write_reg(dev->i2s_base, RER(ch_reg), 1); |
| 238 | } |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | i2s_write_reg(dev->i2s_base, CCR, ccr); |
| 242 | |
| 243 | config->sample_rate = params_rate(params); |
| 244 | |
| 245 | if (!dev->i2s_clk_cfg) |
| 246 | return -EINVAL; |
| 247 | |
| 248 | ret = dev->i2s_clk_cfg(config); |
| 249 | if (ret < 0) { |
| 250 | dev_err(dev->dev, "runtime audio clk config fail\n"); |
| 251 | return ret; |
| 252 | } |
| 253 | |
| 254 | return 0; |
| 255 | } |
| 256 | |
| 257 | static void dw_i2s_shutdown(struct snd_pcm_substream *substream, |
| 258 | struct snd_soc_dai *dai) |
| 259 | { |
| 260 | snd_soc_dai_set_dma_data(dai, substream, NULL); |
| 261 | } |
| 262 | |
Andrew Jackson | 3475c3d | 2014-12-19 16:18:05 +0000 | [diff] [blame] | 263 | static int dw_i2s_prepare(struct snd_pcm_substream *substream, |
| 264 | struct snd_soc_dai *dai) |
| 265 | { |
| 266 | struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); |
| 267 | |
| 268 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 269 | i2s_write_reg(dev->i2s_base, TXFFR, 1); |
| 270 | else |
| 271 | i2s_write_reg(dev->i2s_base, RXFFR, 1); |
| 272 | |
| 273 | return 0; |
| 274 | } |
| 275 | |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 276 | static int dw_i2s_trigger(struct snd_pcm_substream *substream, |
| 277 | int cmd, struct snd_soc_dai *dai) |
| 278 | { |
| 279 | struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); |
| 280 | int ret = 0; |
| 281 | |
| 282 | switch (cmd) { |
| 283 | case SNDRV_PCM_TRIGGER_START: |
| 284 | case SNDRV_PCM_TRIGGER_RESUME: |
| 285 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 286 | dev->active++; |
| 287 | i2s_start(dev, substream); |
| 288 | break; |
| 289 | |
| 290 | case SNDRV_PCM_TRIGGER_STOP: |
| 291 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 292 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 293 | dev->active--; |
| 294 | i2s_stop(dev, substream); |
| 295 | break; |
| 296 | default: |
| 297 | ret = -EINVAL; |
| 298 | break; |
| 299 | } |
| 300 | return ret; |
| 301 | } |
| 302 | |
| 303 | static struct snd_soc_dai_ops dw_i2s_dai_ops = { |
| 304 | .startup = dw_i2s_startup, |
| 305 | .shutdown = dw_i2s_shutdown, |
| 306 | .hw_params = dw_i2s_hw_params, |
Andrew Jackson | 3475c3d | 2014-12-19 16:18:05 +0000 | [diff] [blame] | 307 | .prepare = dw_i2s_prepare, |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 308 | .trigger = dw_i2s_trigger, |
| 309 | }; |
| 310 | |
Kuninori Morimoto | 92eaa32 | 2013-03-21 03:31:30 -0700 | [diff] [blame] | 311 | static const struct snd_soc_component_driver dw_i2s_component = { |
| 312 | .name = "dw-i2s", |
| 313 | }; |
| 314 | |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 315 | #ifdef CONFIG_PM |
| 316 | |
| 317 | static int dw_i2s_suspend(struct snd_soc_dai *dai) |
| 318 | { |
| 319 | struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); |
| 320 | |
| 321 | clk_disable(dev->clk); |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | static int dw_i2s_resume(struct snd_soc_dai *dai) |
| 326 | { |
| 327 | struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); |
| 328 | |
| 329 | clk_enable(dev->clk); |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | #else |
| 334 | #define dw_i2s_suspend NULL |
| 335 | #define dw_i2s_resume NULL |
| 336 | #endif |
| 337 | |
| 338 | static int dw_i2s_probe(struct platform_device *pdev) |
| 339 | { |
| 340 | const struct i2s_platform_data *pdata = pdev->dev.platform_data; |
| 341 | struct dw_i2s_dev *dev; |
| 342 | struct resource *res; |
| 343 | int ret; |
| 344 | unsigned int cap; |
| 345 | struct snd_soc_dai_driver *dw_i2s_dai; |
| 346 | |
| 347 | if (!pdata) { |
| 348 | dev_err(&pdev->dev, "Invalid platform data\n"); |
| 349 | return -EINVAL; |
| 350 | } |
| 351 | |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 352 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); |
| 353 | if (!dev) { |
| 354 | dev_warn(&pdev->dev, "kzalloc fail\n"); |
| 355 | return -ENOMEM; |
| 356 | } |
| 357 | |
Andrew Jackson | b163be4 | 2014-12-03 16:38:46 +0000 | [diff] [blame] | 358 | dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL); |
| 359 | if (!dw_i2s_dai) { |
| 360 | dev_err(&pdev->dev, "mem allocation failed for dai driver\n"); |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 361 | return -ENOMEM; |
| 362 | } |
| 363 | |
Andrew Jackson | b163be4 | 2014-12-03 16:38:46 +0000 | [diff] [blame] | 364 | dw_i2s_dai->ops = &dw_i2s_dai_ops; |
| 365 | dw_i2s_dai->suspend = dw_i2s_suspend; |
| 366 | dw_i2s_dai->resume = dw_i2s_resume; |
| 367 | |
| 368 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 369 | if (!res) { |
| 370 | dev_err(&pdev->dev, "no i2s resource defined\n"); |
| 371 | return -ENODEV; |
| 372 | } |
| 373 | |
| 374 | dev->i2s_base = devm_ioremap_resource(&pdev->dev, res); |
| 375 | if (IS_ERR(dev->i2s_base)) { |
| 376 | dev_err(&pdev->dev, "ioremap fail for i2s_region\n"); |
| 377 | return PTR_ERR(dev->i2s_base); |
| 378 | } |
| 379 | |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 380 | cap = pdata->cap; |
| 381 | dev->capability = cap; |
| 382 | dev->i2s_clk_cfg = pdata->i2s_clk_cfg; |
| 383 | |
| 384 | /* Set DMA slaves info */ |
| 385 | |
| 386 | dev->play_dma_data.data = pdata->play_dma_data; |
| 387 | dev->capture_dma_data.data = pdata->capture_dma_data; |
| 388 | dev->play_dma_data.addr = res->start + I2S_TXDMA; |
| 389 | dev->capture_dma_data.addr = res->start + I2S_RXDMA; |
| 390 | dev->play_dma_data.max_burst = 16; |
| 391 | dev->capture_dma_data.max_burst = 16; |
| 392 | dev->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; |
| 393 | dev->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; |
| 394 | dev->play_dma_data.filter = pdata->filter; |
| 395 | dev->capture_dma_data.filter = pdata->filter; |
| 396 | |
| 397 | dev->clk = clk_get(&pdev->dev, NULL); |
| 398 | if (IS_ERR(dev->clk)) |
| 399 | return PTR_ERR(dev->clk); |
| 400 | |
| 401 | ret = clk_enable(dev->clk); |
| 402 | if (ret < 0) |
| 403 | goto err_clk_put; |
| 404 | |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 405 | if (cap & DWC_I2S_PLAY) { |
Rajeev Kumar | 5e83c16 | 2013-06-11 09:29:07 +0530 | [diff] [blame] | 406 | dev_dbg(&pdev->dev, " designware: play supported\n"); |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 407 | dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM; |
| 408 | dw_i2s_dai->playback.channels_max = pdata->channel; |
| 409 | dw_i2s_dai->playback.formats = pdata->snd_fmts; |
| 410 | dw_i2s_dai->playback.rates = pdata->snd_rates; |
| 411 | } |
| 412 | |
| 413 | if (cap & DWC_I2S_RECORD) { |
Rajeev Kumar | 5e83c16 | 2013-06-11 09:29:07 +0530 | [diff] [blame] | 414 | dev_dbg(&pdev->dev, "designware: record supported\n"); |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 415 | dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM; |
| 416 | dw_i2s_dai->capture.channels_max = pdata->channel; |
| 417 | dw_i2s_dai->capture.formats = pdata->snd_fmts; |
| 418 | dw_i2s_dai->capture.rates = pdata->snd_rates; |
| 419 | } |
| 420 | |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 421 | dev->dev = &pdev->dev; |
| 422 | dev_set_drvdata(&pdev->dev, dev); |
Kuninori Morimoto | 92eaa32 | 2013-03-21 03:31:30 -0700 | [diff] [blame] | 423 | ret = snd_soc_register_component(&pdev->dev, &dw_i2s_component, |
| 424 | dw_i2s_dai, 1); |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 425 | if (ret != 0) { |
| 426 | dev_err(&pdev->dev, "not able to register dai\n"); |
Fabio Estevam | e925a6b | 2013-08-26 09:25:15 -0300 | [diff] [blame] | 427 | goto err_clk_disable; |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 428 | } |
| 429 | |
| 430 | return 0; |
| 431 | |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 432 | err_clk_disable: |
| 433 | clk_disable(dev->clk); |
| 434 | err_clk_put: |
| 435 | clk_put(dev->clk); |
| 436 | return ret; |
| 437 | } |
| 438 | |
| 439 | static int dw_i2s_remove(struct platform_device *pdev) |
| 440 | { |
| 441 | struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev); |
| 442 | |
Kuninori Morimoto | 92eaa32 | 2013-03-21 03:31:30 -0700 | [diff] [blame] | 443 | snd_soc_unregister_component(&pdev->dev); |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 444 | |
| 445 | clk_put(dev->clk); |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | static struct platform_driver dw_i2s_driver = { |
| 451 | .probe = dw_i2s_probe, |
| 452 | .remove = dw_i2s_remove, |
| 453 | .driver = { |
| 454 | .name = "designware-i2s", |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 455 | }, |
| 456 | }; |
| 457 | |
| 458 | module_platform_driver(dw_i2s_driver); |
| 459 | |
Rajeev Kumar | b794dbc | 2014-09-09 12:27:19 +0530 | [diff] [blame] | 460 | MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>"); |
Rajeev Kumar | 3a9cf8e | 2012-06-21 15:54:51 +0530 | [diff] [blame] | 461 | MODULE_DESCRIPTION("DESIGNWARE I2S SoC Interface"); |
| 462 | MODULE_LICENSE("GPL"); |
| 463 | MODULE_ALIAS("platform:designware_i2s"); |