Jassi Brar | 5033f43 | 2010-11-22 15:37:25 +0900 | [diff] [blame] | 1 | /* sound/soc/samsung/spdif.c |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 2 | * |
| 3 | * ALSA SoC Audio Layer - Samsung S/PDIF Controller driver |
| 4 | * |
| 5 | * Copyright (c) 2010 Samsung Electronics Co. Ltd |
| 6 | * http://www.samsung.com/ |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/clk.h> |
| 14 | #include <linux/io.h> |
Paul Gortmaker | da155d5 | 2011-07-15 12:38:28 -0400 | [diff] [blame] | 15 | #include <linux/module.h> |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 16 | |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 17 | #include <sound/soc.h> |
Seungwhan Youn | 0378b6a | 2011-01-11 07:26:06 +0900 | [diff] [blame] | 18 | #include <sound/pcm_params.h> |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 19 | |
Arnd Bergmann | 436d42c | 2012-08-24 15:22:12 +0200 | [diff] [blame] | 20 | #include <linux/platform_data/asoc-s3c.h> |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 21 | |
Jassi Brar | 4b640cf | 2010-11-22 15:35:57 +0900 | [diff] [blame] | 22 | #include "dma.h" |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 23 | #include "spdif.h" |
| 24 | |
| 25 | /* Registers */ |
| 26 | #define CLKCON 0x00 |
| 27 | #define CON 0x04 |
| 28 | #define BSTAS 0x08 |
| 29 | #define CSTAS 0x0C |
| 30 | #define DATA_OUTBUF 0x10 |
| 31 | #define DCNT 0x14 |
| 32 | #define BSTAS_S 0x18 |
| 33 | #define DCNT_S 0x1C |
| 34 | |
| 35 | #define CLKCTL_MASK 0x7 |
| 36 | #define CLKCTL_MCLK_EXT (0x1 << 2) |
| 37 | #define CLKCTL_PWR_ON (0x1 << 0) |
| 38 | |
| 39 | #define CON_MASK 0x3ffffff |
| 40 | #define CON_FIFO_TH_SHIFT 19 |
| 41 | #define CON_FIFO_TH_MASK (0x7 << 19) |
| 42 | #define CON_USERDATA_23RDBIT (0x1 << 12) |
| 43 | |
| 44 | #define CON_SW_RESET (0x1 << 5) |
| 45 | |
| 46 | #define CON_MCLKDIV_MASK (0x3 << 3) |
| 47 | #define CON_MCLKDIV_256FS (0x0 << 3) |
| 48 | #define CON_MCLKDIV_384FS (0x1 << 3) |
| 49 | #define CON_MCLKDIV_512FS (0x2 << 3) |
| 50 | |
| 51 | #define CON_PCM_MASK (0x3 << 1) |
| 52 | #define CON_PCM_16BIT (0x0 << 1) |
| 53 | #define CON_PCM_20BIT (0x1 << 1) |
| 54 | #define CON_PCM_24BIT (0x2 << 1) |
| 55 | |
| 56 | #define CON_PCM_DATA (0x1 << 0) |
| 57 | |
| 58 | #define CSTAS_MASK 0x3fffffff |
| 59 | #define CSTAS_SAMP_FREQ_MASK (0xF << 24) |
| 60 | #define CSTAS_SAMP_FREQ_44 (0x0 << 24) |
| 61 | #define CSTAS_SAMP_FREQ_48 (0x2 << 24) |
| 62 | #define CSTAS_SAMP_FREQ_32 (0x3 << 24) |
| 63 | #define CSTAS_SAMP_FREQ_96 (0xA << 24) |
| 64 | |
| 65 | #define CSTAS_CATEGORY_MASK (0xFF << 8) |
| 66 | #define CSTAS_CATEGORY_CODE_CDP (0x01 << 8) |
| 67 | |
| 68 | #define CSTAS_NO_COPYRIGHT (0x1 << 2) |
| 69 | |
| 70 | /** |
| 71 | * struct samsung_spdif_info - Samsung S/PDIF Controller information |
| 72 | * @lock: Spin lock for S/PDIF. |
| 73 | * @dev: The parent device passed to use from the probe. |
| 74 | * @regs: The pointer to the device register block. |
| 75 | * @clk_rate: Current clock rate for calcurate ratio. |
| 76 | * @pclk: The peri-clock pointer for spdif master operation. |
| 77 | * @sclk: The source clock pointer for making sync signals. |
| 78 | * @save_clkcon: Backup clkcon reg. in suspend. |
| 79 | * @save_con: Backup con reg. in suspend. |
| 80 | * @save_cstas: Backup cstas reg. in suspend. |
| 81 | * @dma_playback: DMA information for playback channel. |
| 82 | */ |
| 83 | struct samsung_spdif_info { |
| 84 | spinlock_t lock; |
| 85 | struct device *dev; |
| 86 | void __iomem *regs; |
| 87 | unsigned long clk_rate; |
| 88 | struct clk *pclk; |
| 89 | struct clk *sclk; |
| 90 | u32 saved_clkcon; |
| 91 | u32 saved_con; |
| 92 | u32 saved_cstas; |
| 93 | struct s3c_dma_params *dma_playback; |
| 94 | }; |
| 95 | |
Sachin Kamat | 71e5222 | 2014-04-08 17:11:04 +0530 | [diff] [blame] | 96 | static struct s3c_dma_client spdif_dma_client_out = { |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 97 | .name = "S/PDIF Stereo out", |
| 98 | }; |
| 99 | |
| 100 | static struct s3c_dma_params spdif_stereo_out; |
| 101 | static struct samsung_spdif_info spdif_info; |
| 102 | |
| 103 | static inline struct samsung_spdif_info *to_info(struct snd_soc_dai *cpu_dai) |
| 104 | { |
| 105 | return snd_soc_dai_get_drvdata(cpu_dai); |
| 106 | } |
| 107 | |
| 108 | static void spdif_snd_txctrl(struct samsung_spdif_info *spdif, int on) |
| 109 | { |
| 110 | void __iomem *regs = spdif->regs; |
| 111 | u32 clkcon; |
| 112 | |
| 113 | dev_dbg(spdif->dev, "Entered %s\n", __func__); |
| 114 | |
| 115 | clkcon = readl(regs + CLKCON) & CLKCTL_MASK; |
| 116 | if (on) |
| 117 | writel(clkcon | CLKCTL_PWR_ON, regs + CLKCON); |
| 118 | else |
| 119 | writel(clkcon & ~CLKCTL_PWR_ON, regs + CLKCON); |
| 120 | } |
| 121 | |
| 122 | static int spdif_set_sysclk(struct snd_soc_dai *cpu_dai, |
| 123 | int clk_id, unsigned int freq, int dir) |
| 124 | { |
| 125 | struct samsung_spdif_info *spdif = to_info(cpu_dai); |
| 126 | u32 clkcon; |
| 127 | |
| 128 | dev_dbg(spdif->dev, "Entered %s\n", __func__); |
| 129 | |
| 130 | clkcon = readl(spdif->regs + CLKCON); |
| 131 | |
| 132 | if (clk_id == SND_SOC_SPDIF_INT_MCLK) |
| 133 | clkcon &= ~CLKCTL_MCLK_EXT; |
| 134 | else |
| 135 | clkcon |= CLKCTL_MCLK_EXT; |
| 136 | |
| 137 | writel(clkcon, spdif->regs + CLKCON); |
| 138 | |
| 139 | spdif->clk_rate = freq; |
| 140 | |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | static int spdif_trigger(struct snd_pcm_substream *substream, int cmd, |
| 145 | struct snd_soc_dai *dai) |
| 146 | { |
| 147 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 148 | struct samsung_spdif_info *spdif = to_info(rtd->cpu_dai); |
| 149 | unsigned long flags; |
| 150 | |
| 151 | dev_dbg(spdif->dev, "Entered %s\n", __func__); |
| 152 | |
| 153 | switch (cmd) { |
| 154 | case SNDRV_PCM_TRIGGER_START: |
| 155 | case SNDRV_PCM_TRIGGER_RESUME: |
| 156 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 157 | spin_lock_irqsave(&spdif->lock, flags); |
| 158 | spdif_snd_txctrl(spdif, 1); |
| 159 | spin_unlock_irqrestore(&spdif->lock, flags); |
| 160 | break; |
| 161 | case SNDRV_PCM_TRIGGER_STOP: |
| 162 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 163 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 164 | spin_lock_irqsave(&spdif->lock, flags); |
| 165 | spdif_snd_txctrl(spdif, 0); |
| 166 | spin_unlock_irqrestore(&spdif->lock, flags); |
| 167 | break; |
| 168 | default: |
| 169 | return -EINVAL; |
| 170 | } |
| 171 | |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | static int spdif_sysclk_ratios[] = { |
| 176 | 512, 384, 256, |
| 177 | }; |
| 178 | |
| 179 | static int spdif_hw_params(struct snd_pcm_substream *substream, |
| 180 | struct snd_pcm_hw_params *params, |
| 181 | struct snd_soc_dai *socdai) |
| 182 | { |
| 183 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 184 | struct samsung_spdif_info *spdif = to_info(rtd->cpu_dai); |
| 185 | void __iomem *regs = spdif->regs; |
| 186 | struct s3c_dma_params *dma_data; |
| 187 | u32 con, clkcon, cstas; |
| 188 | unsigned long flags; |
| 189 | int i, ratio; |
| 190 | |
| 191 | dev_dbg(spdif->dev, "Entered %s\n", __func__); |
| 192 | |
| 193 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 194 | dma_data = spdif->dma_playback; |
| 195 | else { |
| 196 | dev_err(spdif->dev, "Capture is not supported\n"); |
| 197 | return -EINVAL; |
| 198 | } |
| 199 | |
| 200 | snd_soc_dai_set_dma_data(rtd->cpu_dai, substream, dma_data); |
| 201 | |
| 202 | spin_lock_irqsave(&spdif->lock, flags); |
| 203 | |
| 204 | con = readl(regs + CON) & CON_MASK; |
| 205 | cstas = readl(regs + CSTAS) & CSTAS_MASK; |
| 206 | clkcon = readl(regs + CLKCON) & CLKCTL_MASK; |
| 207 | |
| 208 | con &= ~CON_FIFO_TH_MASK; |
| 209 | con |= (0x7 << CON_FIFO_TH_SHIFT); |
| 210 | con |= CON_USERDATA_23RDBIT; |
| 211 | con |= CON_PCM_DATA; |
| 212 | |
| 213 | con &= ~CON_PCM_MASK; |
Tushar Behera | 88ce146 | 2014-05-23 17:35:39 +0530 | [diff] [blame] | 214 | switch (params_width(params)) { |
| 215 | case 16: |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 216 | con |= CON_PCM_16BIT; |
| 217 | break; |
| 218 | default: |
| 219 | dev_err(spdif->dev, "Unsupported data size.\n"); |
| 220 | goto err; |
| 221 | } |
| 222 | |
| 223 | ratio = spdif->clk_rate / params_rate(params); |
| 224 | for (i = 0; i < ARRAY_SIZE(spdif_sysclk_ratios); i++) |
| 225 | if (ratio == spdif_sysclk_ratios[i]) |
| 226 | break; |
| 227 | if (i == ARRAY_SIZE(spdif_sysclk_ratios)) { |
| 228 | dev_err(spdif->dev, "Invalid clock ratio %ld/%d\n", |
| 229 | spdif->clk_rate, params_rate(params)); |
| 230 | goto err; |
| 231 | } |
| 232 | |
| 233 | con &= ~CON_MCLKDIV_MASK; |
| 234 | switch (ratio) { |
| 235 | case 256: |
| 236 | con |= CON_MCLKDIV_256FS; |
| 237 | break; |
| 238 | case 384: |
| 239 | con |= CON_MCLKDIV_384FS; |
| 240 | break; |
| 241 | case 512: |
| 242 | con |= CON_MCLKDIV_512FS; |
| 243 | break; |
| 244 | } |
| 245 | |
| 246 | cstas &= ~CSTAS_SAMP_FREQ_MASK; |
| 247 | switch (params_rate(params)) { |
| 248 | case 44100: |
| 249 | cstas |= CSTAS_SAMP_FREQ_44; |
| 250 | break; |
| 251 | case 48000: |
| 252 | cstas |= CSTAS_SAMP_FREQ_48; |
| 253 | break; |
| 254 | case 32000: |
| 255 | cstas |= CSTAS_SAMP_FREQ_32; |
| 256 | break; |
| 257 | case 96000: |
| 258 | cstas |= CSTAS_SAMP_FREQ_96; |
| 259 | break; |
| 260 | default: |
| 261 | dev_err(spdif->dev, "Invalid sampling rate %d\n", |
| 262 | params_rate(params)); |
| 263 | goto err; |
| 264 | } |
| 265 | |
| 266 | cstas &= ~CSTAS_CATEGORY_MASK; |
| 267 | cstas |= CSTAS_CATEGORY_CODE_CDP; |
| 268 | cstas |= CSTAS_NO_COPYRIGHT; |
| 269 | |
| 270 | writel(con, regs + CON); |
| 271 | writel(cstas, regs + CSTAS); |
| 272 | writel(clkcon, regs + CLKCON); |
| 273 | |
| 274 | spin_unlock_irqrestore(&spdif->lock, flags); |
| 275 | |
| 276 | return 0; |
| 277 | err: |
| 278 | spin_unlock_irqrestore(&spdif->lock, flags); |
| 279 | return -EINVAL; |
| 280 | } |
| 281 | |
| 282 | static void spdif_shutdown(struct snd_pcm_substream *substream, |
| 283 | struct snd_soc_dai *dai) |
| 284 | { |
| 285 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 286 | struct samsung_spdif_info *spdif = to_info(rtd->cpu_dai); |
| 287 | void __iomem *regs = spdif->regs; |
| 288 | u32 con, clkcon; |
| 289 | |
| 290 | dev_dbg(spdif->dev, "Entered %s\n", __func__); |
| 291 | |
| 292 | con = readl(regs + CON) & CON_MASK; |
| 293 | clkcon = readl(regs + CLKCON) & CLKCTL_MASK; |
| 294 | |
| 295 | writel(con | CON_SW_RESET, regs + CON); |
| 296 | cpu_relax(); |
| 297 | |
| 298 | writel(clkcon & ~CLKCTL_PWR_ON, regs + CLKCON); |
| 299 | } |
| 300 | |
| 301 | #ifdef CONFIG_PM |
| 302 | static int spdif_suspend(struct snd_soc_dai *cpu_dai) |
| 303 | { |
| 304 | struct samsung_spdif_info *spdif = to_info(cpu_dai); |
| 305 | u32 con = spdif->saved_con; |
| 306 | |
| 307 | dev_dbg(spdif->dev, "Entered %s\n", __func__); |
| 308 | |
| 309 | spdif->saved_clkcon = readl(spdif->regs + CLKCON) & CLKCTL_MASK; |
| 310 | spdif->saved_con = readl(spdif->regs + CON) & CON_MASK; |
| 311 | spdif->saved_cstas = readl(spdif->regs + CSTAS) & CSTAS_MASK; |
| 312 | |
| 313 | writel(con | CON_SW_RESET, spdif->regs + CON); |
| 314 | cpu_relax(); |
| 315 | |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | static int spdif_resume(struct snd_soc_dai *cpu_dai) |
| 320 | { |
| 321 | struct samsung_spdif_info *spdif = to_info(cpu_dai); |
| 322 | |
| 323 | dev_dbg(spdif->dev, "Entered %s\n", __func__); |
| 324 | |
| 325 | writel(spdif->saved_clkcon, spdif->regs + CLKCON); |
| 326 | writel(spdif->saved_con, spdif->regs + CON); |
| 327 | writel(spdif->saved_cstas, spdif->regs + CSTAS); |
| 328 | |
| 329 | return 0; |
| 330 | } |
| 331 | #else |
| 332 | #define spdif_suspend NULL |
| 333 | #define spdif_resume NULL |
| 334 | #endif |
| 335 | |
Lars-Peter Clausen | 85e7652 | 2011-11-23 11:40:40 +0100 | [diff] [blame] | 336 | static const struct snd_soc_dai_ops spdif_dai_ops = { |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 337 | .set_sysclk = spdif_set_sysclk, |
| 338 | .trigger = spdif_trigger, |
| 339 | .hw_params = spdif_hw_params, |
| 340 | .shutdown = spdif_shutdown, |
| 341 | }; |
| 342 | |
Axel Lin | bc6bd90 | 2011-10-02 17:42:30 +0800 | [diff] [blame] | 343 | static struct snd_soc_dai_driver samsung_spdif_dai = { |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 344 | .name = "samsung-spdif", |
| 345 | .playback = { |
| 346 | .stream_name = "S/PDIF Playback", |
| 347 | .channels_min = 2, |
| 348 | .channels_max = 2, |
| 349 | .rates = (SNDRV_PCM_RATE_32000 | |
| 350 | SNDRV_PCM_RATE_44100 | |
| 351 | SNDRV_PCM_RATE_48000 | |
| 352 | SNDRV_PCM_RATE_96000), |
| 353 | .formats = SNDRV_PCM_FMTBIT_S16_LE, }, |
| 354 | .ops = &spdif_dai_ops, |
| 355 | .suspend = spdif_suspend, |
| 356 | .resume = spdif_resume, |
| 357 | }; |
| 358 | |
Kuninori Morimoto | c3764d8 | 2013-03-21 03:35:44 -0700 | [diff] [blame] | 359 | static const struct snd_soc_component_driver samsung_spdif_component = { |
| 360 | .name = "samsung-spdif", |
| 361 | }; |
| 362 | |
Bill Pemberton | fdca21a | 2012-12-07 09:26:15 -0500 | [diff] [blame] | 363 | static int spdif_probe(struct platform_device *pdev) |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 364 | { |
| 365 | struct s3c_audio_pdata *spdif_pdata; |
| 366 | struct resource *mem_res, *dma_res; |
| 367 | struct samsung_spdif_info *spdif; |
| 368 | int ret; |
| 369 | |
| 370 | spdif_pdata = pdev->dev.platform_data; |
| 371 | |
| 372 | dev_dbg(&pdev->dev, "Entered %s\n", __func__); |
| 373 | |
| 374 | dma_res = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
| 375 | if (!dma_res) { |
| 376 | dev_err(&pdev->dev, "Unable to get dma resource.\n"); |
| 377 | return -ENXIO; |
| 378 | } |
| 379 | |
| 380 | mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 381 | if (!mem_res) { |
| 382 | dev_err(&pdev->dev, "Unable to get register resource.\n"); |
| 383 | return -ENXIO; |
| 384 | } |
| 385 | |
| 386 | if (spdif_pdata && spdif_pdata->cfg_gpio |
| 387 | && spdif_pdata->cfg_gpio(pdev)) { |
| 388 | dev_err(&pdev->dev, "Unable to configure GPIO pins\n"); |
| 389 | return -EINVAL; |
| 390 | } |
| 391 | |
| 392 | spdif = &spdif_info; |
| 393 | spdif->dev = &pdev->dev; |
| 394 | |
| 395 | spin_lock_init(&spdif->lock); |
| 396 | |
Mark Brown | 7497185 | 2013-07-15 18:13:35 +0100 | [diff] [blame] | 397 | spdif->pclk = devm_clk_get(&pdev->dev, "spdif"); |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 398 | if (IS_ERR(spdif->pclk)) { |
| 399 | dev_err(&pdev->dev, "failed to get peri-clock\n"); |
| 400 | ret = -ENOENT; |
| 401 | goto err0; |
| 402 | } |
Thomas Abraham | 9d01e9b | 2012-10-03 08:48:25 +0900 | [diff] [blame] | 403 | clk_prepare_enable(spdif->pclk); |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 404 | |
Mark Brown | 7497185 | 2013-07-15 18:13:35 +0100 | [diff] [blame] | 405 | spdif->sclk = devm_clk_get(&pdev->dev, "sclk_spdif"); |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 406 | if (IS_ERR(spdif->sclk)) { |
| 407 | dev_err(&pdev->dev, "failed to get internal source clock\n"); |
| 408 | ret = -ENOENT; |
| 409 | goto err1; |
| 410 | } |
Thomas Abraham | 9d01e9b | 2012-10-03 08:48:25 +0900 | [diff] [blame] | 411 | clk_prepare_enable(spdif->sclk); |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 412 | |
| 413 | /* Request S/PDIF Register's memory region */ |
| 414 | if (!request_mem_region(mem_res->start, |
| 415 | resource_size(mem_res), "samsung-spdif")) { |
| 416 | dev_err(&pdev->dev, "Unable to request register region\n"); |
| 417 | ret = -EBUSY; |
| 418 | goto err2; |
| 419 | } |
| 420 | |
| 421 | spdif->regs = ioremap(mem_res->start, 0x100); |
| 422 | if (spdif->regs == NULL) { |
| 423 | dev_err(&pdev->dev, "Cannot ioremap registers\n"); |
| 424 | ret = -ENXIO; |
| 425 | goto err3; |
| 426 | } |
| 427 | |
| 428 | dev_set_drvdata(&pdev->dev, spdif); |
| 429 | |
Tushar Behera | 7253e35 | 2014-05-21 08:52:19 +0530 | [diff] [blame] | 430 | ret = devm_snd_soc_register_component(&pdev->dev, |
| 431 | &samsung_spdif_component, &samsung_spdif_dai, 1); |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 432 | if (ret != 0) { |
| 433 | dev_err(&pdev->dev, "fail to register dai\n"); |
| 434 | goto err4; |
| 435 | } |
| 436 | |
| 437 | spdif_stereo_out.dma_size = 2; |
| 438 | spdif_stereo_out.client = &spdif_dma_client_out; |
| 439 | spdif_stereo_out.dma_addr = mem_res->start + DATA_OUTBUF; |
| 440 | spdif_stereo_out.channel = dma_res->start; |
| 441 | |
| 442 | spdif->dma_playback = &spdif_stereo_out; |
| 443 | |
Tushar Behera | 06b10ff | 2013-08-22 18:15:02 +0530 | [diff] [blame] | 444 | ret = samsung_asoc_dma_platform_register(&pdev->dev); |
Padmavathi Venna | a08485d | 2012-12-07 13:59:21 +0530 | [diff] [blame] | 445 | if (ret) { |
| 446 | dev_err(&pdev->dev, "failed to register DMA: %d\n", ret); |
Tushar Behera | 7253e35 | 2014-05-21 08:52:19 +0530 | [diff] [blame] | 447 | goto err4; |
Padmavathi Venna | a08485d | 2012-12-07 13:59:21 +0530 | [diff] [blame] | 448 | } |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 449 | |
Padmavathi Venna | a08485d | 2012-12-07 13:59:21 +0530 | [diff] [blame] | 450 | return 0; |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 451 | err4: |
| 452 | iounmap(spdif->regs); |
| 453 | err3: |
| 454 | release_mem_region(mem_res->start, resource_size(mem_res)); |
| 455 | err2: |
Thomas Abraham | 9d01e9b | 2012-10-03 08:48:25 +0900 | [diff] [blame] | 456 | clk_disable_unprepare(spdif->sclk); |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 457 | err1: |
Thomas Abraham | 9d01e9b | 2012-10-03 08:48:25 +0900 | [diff] [blame] | 458 | clk_disable_unprepare(spdif->pclk); |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 459 | err0: |
| 460 | return ret; |
| 461 | } |
| 462 | |
Bill Pemberton | fdca21a | 2012-12-07 09:26:15 -0500 | [diff] [blame] | 463 | static int spdif_remove(struct platform_device *pdev) |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 464 | { |
| 465 | struct samsung_spdif_info *spdif = &spdif_info; |
| 466 | struct resource *mem_res; |
| 467 | |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 468 | iounmap(spdif->regs); |
| 469 | |
| 470 | mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 471 | if (mem_res) |
| 472 | release_mem_region(mem_res->start, resource_size(mem_res)); |
| 473 | |
Thomas Abraham | 9d01e9b | 2012-10-03 08:48:25 +0900 | [diff] [blame] | 474 | clk_disable_unprepare(spdif->sclk); |
Thomas Abraham | 9d01e9b | 2012-10-03 08:48:25 +0900 | [diff] [blame] | 475 | clk_disable_unprepare(spdif->pclk); |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 476 | |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | static struct platform_driver samsung_spdif_driver = { |
| 481 | .probe = spdif_probe, |
Bill Pemberton | fdca21a | 2012-12-07 09:26:15 -0500 | [diff] [blame] | 482 | .remove = spdif_remove, |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 483 | .driver = { |
| 484 | .name = "samsung-spdif", |
| 485 | .owner = THIS_MODULE, |
| 486 | }, |
| 487 | }; |
| 488 | |
Mark Brown | e00c3f5 | 2011-11-23 15:20:13 +0000 | [diff] [blame] | 489 | module_platform_driver(samsung_spdif_driver); |
Seungwhan Youn | fc127cc | 2010-10-12 20:51:23 +0900 | [diff] [blame] | 490 | |
| 491 | MODULE_AUTHOR("Seungwhan Youn, <sw.youn@samsung.com>"); |
| 492 | MODULE_DESCRIPTION("Samsung S/PDIF Controller Driver"); |
| 493 | MODULE_LICENSE("GPL"); |
| 494 | MODULE_ALIAS("platform:samsung-spdif"); |