Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 1 | /* |
| 2 | * linux/sound/soc/ep93xx-i2s.c |
| 3 | * EP93xx I2S driver |
| 4 | * |
| 5 | * Copyright (C) 2010 Ryan Mallon <ryan@bluewatersys.com> |
| 6 | * |
| 7 | * Based on the original driver by: |
| 8 | * Copyright (C) 2007 Chase Douglas <chasedouglas@gmail> |
| 9 | * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/clk.h> |
| 21 | #include <linux/io.h> |
| 22 | |
| 23 | #include <sound/core.h> |
| 24 | #include <sound/pcm.h> |
| 25 | #include <sound/pcm_params.h> |
| 26 | #include <sound/initval.h> |
| 27 | #include <sound/soc.h> |
| 28 | |
| 29 | #include <mach/hardware.h> |
| 30 | #include <mach/ep93xx-regs.h> |
| 31 | #include <mach/dma.h> |
| 32 | |
| 33 | #include "ep93xx-pcm.h" |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 34 | |
| 35 | #define EP93XX_I2S_TXCLKCFG 0x00 |
| 36 | #define EP93XX_I2S_RXCLKCFG 0x04 |
| 37 | #define EP93XX_I2S_GLCTRL 0x0C |
| 38 | |
| 39 | #define EP93XX_I2S_TXLINCTRLDATA 0x28 |
| 40 | #define EP93XX_I2S_TXCTRL 0x2C |
| 41 | #define EP93XX_I2S_TXWRDLEN 0x30 |
| 42 | #define EP93XX_I2S_TX0EN 0x34 |
| 43 | |
| 44 | #define EP93XX_I2S_RXLINCTRLDATA 0x58 |
| 45 | #define EP93XX_I2S_RXCTRL 0x5C |
| 46 | #define EP93XX_I2S_RXWRDLEN 0x60 |
| 47 | #define EP93XX_I2S_RX0EN 0x64 |
| 48 | |
| 49 | #define EP93XX_I2S_WRDLEN_16 (0 << 0) |
| 50 | #define EP93XX_I2S_WRDLEN_24 (1 << 0) |
| 51 | #define EP93XX_I2S_WRDLEN_32 (2 << 0) |
| 52 | |
| 53 | #define EP93XX_I2S_LINCTRLDATA_R_JUST (1 << 2) /* Right justify */ |
| 54 | |
| 55 | #define EP93XX_I2S_CLKCFG_LRS (1 << 0) /* lrclk polarity */ |
| 56 | #define EP93XX_I2S_CLKCFG_CKP (1 << 1) /* Bit clock polarity */ |
| 57 | #define EP93XX_I2S_CLKCFG_REL (1 << 2) /* First bit transition */ |
| 58 | #define EP93XX_I2S_CLKCFG_MASTER (1 << 3) /* Master mode */ |
| 59 | #define EP93XX_I2S_CLKCFG_NBCG (1 << 4) /* Not bit clock gating */ |
| 60 | |
| 61 | struct ep93xx_i2s_info { |
| 62 | struct clk *mclk; |
| 63 | struct clk *sclk; |
| 64 | struct clk *lrclk; |
| 65 | struct ep93xx_pcm_dma_params *dma_params; |
| 66 | struct resource *mem; |
| 67 | void __iomem *regs; |
| 68 | }; |
| 69 | |
| 70 | struct ep93xx_pcm_dma_params ep93xx_i2s_dma_params[] = { |
| 71 | [SNDRV_PCM_STREAM_PLAYBACK] = { |
| 72 | .name = "i2s-pcm-out", |
| 73 | .dma_port = EP93XX_DMA_M2P_PORT_I2S1, |
| 74 | }, |
| 75 | [SNDRV_PCM_STREAM_CAPTURE] = { |
| 76 | .name = "i2s-pcm-in", |
| 77 | .dma_port = EP93XX_DMA_M2P_PORT_I2S1, |
| 78 | }, |
| 79 | }; |
| 80 | |
| 81 | static inline void ep93xx_i2s_write_reg(struct ep93xx_i2s_info *info, |
| 82 | unsigned reg, unsigned val) |
| 83 | { |
| 84 | __raw_writel(val, info->regs + reg); |
| 85 | } |
| 86 | |
| 87 | static inline unsigned ep93xx_i2s_read_reg(struct ep93xx_i2s_info *info, |
| 88 | unsigned reg) |
| 89 | { |
| 90 | return __raw_readl(info->regs + reg); |
| 91 | } |
| 92 | |
| 93 | static void ep93xx_i2s_enable(struct ep93xx_i2s_info *info, int stream) |
| 94 | { |
| 95 | unsigned base_reg; |
| 96 | int i; |
| 97 | |
| 98 | if ((ep93xx_i2s_read_reg(info, EP93XX_I2S_TX0EN) & 0x1) == 0 && |
| 99 | (ep93xx_i2s_read_reg(info, EP93XX_I2S_RX0EN) & 0x1) == 0) { |
| 100 | /* Enable clocks */ |
| 101 | clk_enable(info->mclk); |
| 102 | clk_enable(info->sclk); |
| 103 | clk_enable(info->lrclk); |
| 104 | |
| 105 | /* Enable i2s */ |
| 106 | ep93xx_i2s_write_reg(info, EP93XX_I2S_GLCTRL, 1); |
| 107 | } |
| 108 | |
| 109 | /* Enable fifos */ |
| 110 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 111 | base_reg = EP93XX_I2S_TX0EN; |
| 112 | else |
| 113 | base_reg = EP93XX_I2S_RX0EN; |
| 114 | for (i = 0; i < 3; i++) |
| 115 | ep93xx_i2s_write_reg(info, base_reg + (i * 4), 1); |
| 116 | } |
| 117 | |
| 118 | static void ep93xx_i2s_disable(struct ep93xx_i2s_info *info, int stream) |
| 119 | { |
| 120 | unsigned base_reg; |
| 121 | int i; |
| 122 | |
| 123 | /* Disable fifos */ |
| 124 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 125 | base_reg = EP93XX_I2S_TX0EN; |
| 126 | else |
| 127 | base_reg = EP93XX_I2S_RX0EN; |
| 128 | for (i = 0; i < 3; i++) |
| 129 | ep93xx_i2s_write_reg(info, base_reg + (i * 4), 0); |
| 130 | |
| 131 | if ((ep93xx_i2s_read_reg(info, EP93XX_I2S_TX0EN) & 0x1) == 0 && |
| 132 | (ep93xx_i2s_read_reg(info, EP93XX_I2S_RX0EN) & 0x1) == 0) { |
| 133 | /* Disable i2s */ |
| 134 | ep93xx_i2s_write_reg(info, EP93XX_I2S_GLCTRL, 0); |
| 135 | |
| 136 | /* Disable clocks */ |
| 137 | clk_disable(info->lrclk); |
| 138 | clk_disable(info->sclk); |
| 139 | clk_disable(info->mclk); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | static int ep93xx_i2s_startup(struct snd_pcm_substream *substream, |
| 144 | struct snd_soc_dai *dai) |
| 145 | { |
| 146 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 147 | struct ep93xx_i2s_info *info = snd_soc_dai_get_drvdata(dai); |
| 148 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 149 | |
| 150 | snd_soc_dai_set_dma_data(cpu_dai, substream, |
| 151 | &info->dma_params[substream->stream]); |
| 152 | return 0; |
| 153 | } |
| 154 | |
| 155 | static void ep93xx_i2s_shutdown(struct snd_pcm_substream *substream, |
| 156 | struct snd_soc_dai *dai) |
| 157 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 158 | struct ep93xx_i2s_info *info = snd_soc_dai_get_drvdata(dai); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 159 | |
| 160 | ep93xx_i2s_disable(info, substream->stream); |
| 161 | } |
| 162 | |
| 163 | static int ep93xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, |
| 164 | unsigned int fmt) |
| 165 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 166 | struct ep93xx_i2s_info *info = snd_soc_dai_get_drvdata(cpu_dai); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 167 | unsigned int clk_cfg, lin_ctrl; |
| 168 | |
| 169 | clk_cfg = ep93xx_i2s_read_reg(info, EP93XX_I2S_RXCLKCFG); |
| 170 | lin_ctrl = ep93xx_i2s_read_reg(info, EP93XX_I2S_RXLINCTRLDATA); |
| 171 | |
| 172 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 173 | case SND_SOC_DAIFMT_I2S: |
| 174 | clk_cfg |= EP93XX_I2S_CLKCFG_REL; |
| 175 | lin_ctrl &= ~EP93XX_I2S_LINCTRLDATA_R_JUST; |
| 176 | break; |
| 177 | |
| 178 | case SND_SOC_DAIFMT_LEFT_J: |
| 179 | clk_cfg &= ~EP93XX_I2S_CLKCFG_REL; |
| 180 | lin_ctrl &= ~EP93XX_I2S_LINCTRLDATA_R_JUST; |
| 181 | break; |
| 182 | |
| 183 | case SND_SOC_DAIFMT_RIGHT_J: |
| 184 | clk_cfg &= ~EP93XX_I2S_CLKCFG_REL; |
| 185 | lin_ctrl |= EP93XX_I2S_LINCTRLDATA_R_JUST; |
| 186 | break; |
| 187 | |
| 188 | default: |
| 189 | return -EINVAL; |
| 190 | } |
| 191 | |
| 192 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 193 | case SND_SOC_DAIFMT_CBS_CFS: |
| 194 | /* CPU is master */ |
| 195 | clk_cfg |= EP93XX_I2S_CLKCFG_MASTER; |
| 196 | break; |
| 197 | |
| 198 | case SND_SOC_DAIFMT_CBM_CFM: |
| 199 | /* Codec is master */ |
| 200 | clk_cfg &= ~EP93XX_I2S_CLKCFG_MASTER; |
| 201 | break; |
| 202 | |
| 203 | default: |
| 204 | return -EINVAL; |
| 205 | } |
| 206 | |
| 207 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| 208 | case SND_SOC_DAIFMT_NB_NF: |
| 209 | /* Negative bit clock, lrclk low on left word */ |
| 210 | clk_cfg &= ~(EP93XX_I2S_CLKCFG_CKP | EP93XX_I2S_CLKCFG_REL); |
| 211 | break; |
| 212 | |
| 213 | case SND_SOC_DAIFMT_NB_IF: |
| 214 | /* Negative bit clock, lrclk low on right word */ |
| 215 | clk_cfg &= ~EP93XX_I2S_CLKCFG_CKP; |
| 216 | clk_cfg |= EP93XX_I2S_CLKCFG_REL; |
| 217 | break; |
| 218 | |
| 219 | case SND_SOC_DAIFMT_IB_NF: |
| 220 | /* Positive bit clock, lrclk low on left word */ |
| 221 | clk_cfg |= EP93XX_I2S_CLKCFG_CKP; |
| 222 | clk_cfg &= ~EP93XX_I2S_CLKCFG_REL; |
| 223 | break; |
| 224 | |
| 225 | case SND_SOC_DAIFMT_IB_IF: |
| 226 | /* Positive bit clock, lrclk low on right word */ |
| 227 | clk_cfg |= EP93XX_I2S_CLKCFG_CKP | EP93XX_I2S_CLKCFG_REL; |
| 228 | break; |
| 229 | } |
| 230 | |
| 231 | /* Write new register values */ |
| 232 | ep93xx_i2s_write_reg(info, EP93XX_I2S_RXCLKCFG, clk_cfg); |
| 233 | ep93xx_i2s_write_reg(info, EP93XX_I2S_TXCLKCFG, clk_cfg); |
| 234 | ep93xx_i2s_write_reg(info, EP93XX_I2S_RXLINCTRLDATA, lin_ctrl); |
| 235 | ep93xx_i2s_write_reg(info, EP93XX_I2S_TXLINCTRLDATA, lin_ctrl); |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static int ep93xx_i2s_hw_params(struct snd_pcm_substream *substream, |
| 240 | struct snd_pcm_hw_params *params, |
| 241 | struct snd_soc_dai *dai) |
| 242 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 243 | struct ep93xx_i2s_info *info = snd_soc_dai_get_drvdata(dai); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 244 | unsigned word_len, div, sdiv, lrdiv; |
| 245 | int found = 0, err; |
| 246 | |
| 247 | switch (params_format(params)) { |
| 248 | case SNDRV_PCM_FORMAT_S16_LE: |
| 249 | word_len = EP93XX_I2S_WRDLEN_16; |
| 250 | break; |
| 251 | |
| 252 | case SNDRV_PCM_FORMAT_S24_LE: |
| 253 | word_len = EP93XX_I2S_WRDLEN_24; |
| 254 | break; |
| 255 | |
| 256 | case SNDRV_PCM_FORMAT_S32_LE: |
| 257 | word_len = EP93XX_I2S_WRDLEN_32; |
| 258 | break; |
| 259 | |
| 260 | default: |
| 261 | return -EINVAL; |
| 262 | } |
| 263 | |
| 264 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 265 | ep93xx_i2s_write_reg(info, EP93XX_I2S_TXWRDLEN, word_len); |
| 266 | else |
| 267 | ep93xx_i2s_write_reg(info, EP93XX_I2S_RXWRDLEN, word_len); |
| 268 | |
| 269 | /* |
| 270 | * Calculate the sdiv (bit clock) and lrdiv (left/right clock) values. |
| 271 | * If the lrclk is pulse length is larger than the word size, then the |
| 272 | * bit clock will be gated for the unused bits. |
| 273 | */ |
| 274 | div = (clk_get_rate(info->mclk) / params_rate(params)) * |
| 275 | params_channels(params); |
| 276 | for (sdiv = 2; sdiv <= 4; sdiv += 2) |
| 277 | for (lrdiv = 32; lrdiv <= 128; lrdiv <<= 1) |
| 278 | if (sdiv * lrdiv == div) { |
| 279 | found = 1; |
| 280 | goto out; |
| 281 | } |
| 282 | out: |
| 283 | if (!found) |
| 284 | return -EINVAL; |
| 285 | |
| 286 | err = clk_set_rate(info->sclk, clk_get_rate(info->mclk) / sdiv); |
| 287 | if (err) |
| 288 | return err; |
| 289 | |
| 290 | err = clk_set_rate(info->lrclk, clk_get_rate(info->sclk) / lrdiv); |
| 291 | if (err) |
| 292 | return err; |
| 293 | |
| 294 | ep93xx_i2s_enable(info, substream->stream); |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | static int ep93xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, |
| 299 | unsigned int freq, int dir) |
| 300 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 301 | struct ep93xx_i2s_info *info = snd_soc_dai_get_drvdata(cpu_dai); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 302 | |
| 303 | if (dir == SND_SOC_CLOCK_IN || clk_id != 0) |
| 304 | return -EINVAL; |
| 305 | |
| 306 | return clk_set_rate(info->mclk, freq); |
| 307 | } |
| 308 | |
| 309 | #ifdef CONFIG_PM |
| 310 | static int ep93xx_i2s_suspend(struct snd_soc_dai *dai) |
| 311 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 312 | struct ep93xx_i2s_info *info = snd_soc_dai_get_drvdata(dai); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 313 | |
| 314 | if (!dai->active) |
| 315 | return; |
| 316 | |
| 317 | ep93xx_i2s_disable(info, SNDRV_PCM_STREAM_PLAYBACK); |
| 318 | ep93xx_i2s_disable(info, SNDRV_PCM_STREAM_CAPTURE); |
| 319 | } |
| 320 | |
| 321 | static int ep93xx_i2s_resume(struct snd_soc_dai *dai) |
| 322 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 323 | struct ep93xx_i2s_info *info = snd_soc_dai_get_drvdata(dai); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 324 | |
| 325 | if (!dai->active) |
| 326 | return; |
| 327 | |
| 328 | ep93xx_i2s_enable(info, SNDRV_PCM_STREAM_PLAYBACK); |
| 329 | ep93xx_i2s_enable(info, SNDRV_PCM_STREAM_CAPTURE); |
| 330 | } |
| 331 | #else |
| 332 | #define ep93xx_i2s_suspend NULL |
| 333 | #define ep93xx_i2s_resume NULL |
| 334 | #endif |
| 335 | |
| 336 | static struct snd_soc_dai_ops ep93xx_i2s_dai_ops = { |
| 337 | .startup = ep93xx_i2s_startup, |
| 338 | .shutdown = ep93xx_i2s_shutdown, |
| 339 | .hw_params = ep93xx_i2s_hw_params, |
| 340 | .set_sysclk = ep93xx_i2s_set_sysclk, |
| 341 | .set_fmt = ep93xx_i2s_set_dai_fmt, |
| 342 | }; |
| 343 | |
| 344 | #define EP93XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ |
| 345 | SNDRV_PCM_FMTBIT_S24_LE | \ |
| 346 | SNDRV_PCM_FMTBIT_S32_LE) |
| 347 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 348 | static struct snd_soc_dai_driver ep93xx_i2s_dai = { |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 349 | .symmetric_rates= 1, |
| 350 | .suspend = ep93xx_i2s_suspend, |
| 351 | .resume = ep93xx_i2s_resume, |
| 352 | .playback = { |
| 353 | .channels_min = 2, |
| 354 | .channels_max = 2, |
Alexander Sverdlin | fb67afd | 2010-12-09 03:43:49 +0300 | [diff] [blame^] | 355 | .rates = SNDRV_PCM_RATE_8000_96000, |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 356 | .formats = EP93XX_I2S_FORMATS, |
| 357 | }, |
| 358 | .capture = { |
| 359 | .channels_min = 2, |
| 360 | .channels_max = 2, |
Alexander Sverdlin | fb67afd | 2010-12-09 03:43:49 +0300 | [diff] [blame^] | 361 | .rates = SNDRV_PCM_RATE_8000_96000, |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 362 | .formats = EP93XX_I2S_FORMATS, |
| 363 | }, |
| 364 | .ops = &ep93xx_i2s_dai_ops, |
| 365 | }; |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 366 | |
| 367 | static int ep93xx_i2s_probe(struct platform_device *pdev) |
| 368 | { |
| 369 | struct ep93xx_i2s_info *info; |
| 370 | struct resource *res; |
| 371 | int err; |
| 372 | |
| 373 | info = kzalloc(sizeof(struct ep93xx_i2s_info), GFP_KERNEL); |
| 374 | if (!info) { |
| 375 | err = -ENOMEM; |
| 376 | goto fail; |
| 377 | } |
| 378 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 379 | dev_set_drvdata(&pdev->dev, info); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 380 | info->dma_params = ep93xx_i2s_dma_params; |
| 381 | |
| 382 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 383 | if (!res) { |
| 384 | err = -ENODEV; |
| 385 | goto fail; |
| 386 | } |
| 387 | |
| 388 | info->mem = request_mem_region(res->start, resource_size(res), |
| 389 | pdev->name); |
| 390 | if (!info->mem) { |
| 391 | err = -EBUSY; |
| 392 | goto fail; |
| 393 | } |
| 394 | |
| 395 | info->regs = ioremap(info->mem->start, resource_size(info->mem)); |
| 396 | if (!info->regs) { |
| 397 | err = -ENXIO; |
| 398 | goto fail_release_mem; |
| 399 | } |
| 400 | |
| 401 | info->mclk = clk_get(&pdev->dev, "mclk"); |
| 402 | if (IS_ERR(info->mclk)) { |
| 403 | err = PTR_ERR(info->mclk); |
| 404 | goto fail_unmap_mem; |
| 405 | } |
| 406 | |
| 407 | info->sclk = clk_get(&pdev->dev, "sclk"); |
| 408 | if (IS_ERR(info->sclk)) { |
| 409 | err = PTR_ERR(info->sclk); |
| 410 | goto fail_put_mclk; |
| 411 | } |
| 412 | |
| 413 | info->lrclk = clk_get(&pdev->dev, "lrclk"); |
| 414 | if (IS_ERR(info->lrclk)) { |
| 415 | err = PTR_ERR(info->lrclk); |
| 416 | goto fail_put_sclk; |
| 417 | } |
| 418 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 419 | err = snd_soc_register_dai(&pdev->dev, &ep93xx_i2s_dai); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 420 | if (err) |
| 421 | goto fail_put_lrclk; |
| 422 | |
| 423 | return 0; |
| 424 | |
| 425 | fail_put_lrclk: |
| 426 | clk_put(info->lrclk); |
| 427 | fail_put_sclk: |
| 428 | clk_put(info->sclk); |
| 429 | fail_put_mclk: |
| 430 | clk_put(info->mclk); |
| 431 | fail_unmap_mem: |
| 432 | iounmap(info->regs); |
| 433 | fail_release_mem: |
| 434 | release_mem_region(info->mem->start, resource_size(info->mem)); |
| 435 | kfree(info); |
| 436 | fail: |
| 437 | return err; |
| 438 | } |
| 439 | |
| 440 | static int __devexit ep93xx_i2s_remove(struct platform_device *pdev) |
| 441 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 442 | struct ep93xx_i2s_info *info = dev_get_drvdata(&pdev->dev); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 443 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 444 | snd_soc_unregister_dai(&pdev->dev); |
Ryan Mallon | db5bf41 | 2010-06-04 17:11:24 +1200 | [diff] [blame] | 445 | clk_put(info->lrclk); |
| 446 | clk_put(info->sclk); |
| 447 | clk_put(info->mclk); |
| 448 | iounmap(info->regs); |
| 449 | release_mem_region(info->mem->start, resource_size(info->mem)); |
| 450 | kfree(info); |
| 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | static struct platform_driver ep93xx_i2s_driver = { |
| 455 | .probe = ep93xx_i2s_probe, |
| 456 | .remove = __devexit_p(ep93xx_i2s_remove), |
| 457 | .driver = { |
| 458 | .name = "ep93xx-i2s", |
| 459 | .owner = THIS_MODULE, |
| 460 | }, |
| 461 | }; |
| 462 | |
| 463 | static int __init ep93xx_i2s_init(void) |
| 464 | { |
| 465 | return platform_driver_register(&ep93xx_i2s_driver); |
| 466 | } |
| 467 | |
| 468 | static void __exit ep93xx_i2s_exit(void) |
| 469 | { |
| 470 | platform_driver_unregister(&ep93xx_i2s_driver); |
| 471 | } |
| 472 | |
| 473 | module_init(ep93xx_i2s_init); |
| 474 | module_exit(ep93xx_i2s_exit); |
| 475 | |
| 476 | MODULE_ALIAS("platform:ep93xx-i2s"); |
| 477 | MODULE_AUTHOR("Ryan Mallon <ryan@bluewatersys.com>"); |
| 478 | MODULE_DESCRIPTION("EP93XX I2S driver"); |
| 479 | MODULE_LICENSE("GPL"); |