Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Serial Sound Interface (I2S) support for SH7760/SH7780 |
| 3 | * |
| 4 | * Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net> |
| 5 | * |
| 6 | * licensed under the terms outlined in the file COPYING at the root |
| 7 | * of the linux kernel sources. |
| 8 | * |
| 9 | * dont forget to set IPSEL/OMSEL register bits (in your board code) to |
| 10 | * enable SSI output pins! |
| 11 | */ |
| 12 | |
| 13 | /* |
| 14 | * LIMITATIONS: |
| 15 | * The SSI unit has only one physical data line, so full duplex is |
| 16 | * impossible. This can be remedied on the SH7760 by using the |
| 17 | * other SSI unit for recording; however the SH7780 has only 1 SSI |
| 18 | * unit, and its pins are shared with the AC97 unit, among others. |
| 19 | * |
| 20 | * FEATURES: |
| 21 | * The SSI features "compressed mode": in this mode it continuously |
| 22 | * streams PCM data over the I2S lines and uses LRCK as a handshake |
| 23 | * signal. Can be used to send compressed data (AC3/DTS) to a DSP. |
| 24 | * The number of bits sent over the wire in a frame can be adjusted |
| 25 | * and can be independent from the actual sample bit depth. This is |
| 26 | * useful to support TDM mode codecs like the AD1939 which have a |
| 27 | * fixed TDM slot size, regardless of sample resolution. |
| 28 | */ |
| 29 | |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/platform_device.h> |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 33 | #include <sound/core.h> |
| 34 | #include <sound/pcm.h> |
| 35 | #include <sound/initval.h> |
| 36 | #include <sound/soc.h> |
| 37 | #include <asm/io.h> |
| 38 | |
| 39 | #define SSICR 0x00 |
| 40 | #define SSISR 0x04 |
| 41 | |
| 42 | #define CR_DMAEN (1 << 28) |
| 43 | #define CR_CHNL_SHIFT 22 |
| 44 | #define CR_CHNL_MASK (3 << CR_CHNL_SHIFT) |
| 45 | #define CR_DWL_SHIFT 19 |
| 46 | #define CR_DWL_MASK (7 << CR_DWL_SHIFT) |
| 47 | #define CR_SWL_SHIFT 16 |
| 48 | #define CR_SWL_MASK (7 << CR_SWL_SHIFT) |
| 49 | #define CR_SCK_MASTER (1 << 15) /* bitclock master bit */ |
| 50 | #define CR_SWS_MASTER (1 << 14) /* wordselect master bit */ |
| 51 | #define CR_SCKP (1 << 13) /* I2Sclock polarity */ |
| 52 | #define CR_SWSP (1 << 12) /* LRCK polarity */ |
| 53 | #define CR_SPDP (1 << 11) |
| 54 | #define CR_SDTA (1 << 10) /* i2s alignment (msb/lsb) */ |
| 55 | #define CR_PDTA (1 << 9) /* fifo data alignment */ |
| 56 | #define CR_DEL (1 << 8) /* delay data by 1 i2sclk */ |
| 57 | #define CR_BREN (1 << 7) /* clock gating in burst mode */ |
| 58 | #define CR_CKDIV_SHIFT 4 |
| 59 | #define CR_CKDIV_MASK (7 << CR_CKDIV_SHIFT) /* bitclock divider */ |
| 60 | #define CR_MUTE (1 << 3) /* SSI mute */ |
| 61 | #define CR_CPEN (1 << 2) /* compressed mode */ |
| 62 | #define CR_TRMD (1 << 1) /* transmit/receive select */ |
| 63 | #define CR_EN (1 << 0) /* enable SSI */ |
| 64 | |
| 65 | #define SSIREG(reg) (*(unsigned long *)(ssi->mmio + (reg))) |
| 66 | |
| 67 | struct ssi_priv { |
| 68 | unsigned long mmio; |
| 69 | unsigned long sysclk; |
| 70 | int inuse; |
| 71 | } ssi_cpu_data[] = { |
| 72 | #if defined(CONFIG_CPU_SUBTYPE_SH7760) |
| 73 | { |
| 74 | .mmio = 0xFE680000, |
| 75 | }, |
| 76 | { |
| 77 | .mmio = 0xFE690000, |
| 78 | }, |
| 79 | #elif defined(CONFIG_CPU_SUBTYPE_SH7780) |
| 80 | { |
| 81 | .mmio = 0xFFE70000, |
| 82 | }, |
| 83 | #else |
| 84 | #error "Unsupported SuperH SoC" |
| 85 | #endif |
| 86 | }; |
| 87 | |
| 88 | /* |
| 89 | * track usage of the SSI; it is simplex-only so prevent attempts of |
| 90 | * concurrent playback + capture. FIXME: any locking required? |
| 91 | */ |
Mark Brown | dee89c4 | 2008-11-18 22:11:38 +0000 | [diff] [blame] | 92 | static int ssi_startup(struct snd_pcm_substream *substream, |
| 93 | struct snd_soc_dai *dai) |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 94 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 95 | struct ssi_priv *ssi = &ssi_cpu_data[dai->id]; |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 96 | if (ssi->inuse) { |
| 97 | pr_debug("ssi: already in use!\n"); |
| 98 | return -EBUSY; |
| 99 | } else |
| 100 | ssi->inuse = 1; |
| 101 | return 0; |
| 102 | } |
| 103 | |
Mark Brown | dee89c4 | 2008-11-18 22:11:38 +0000 | [diff] [blame] | 104 | static void ssi_shutdown(struct snd_pcm_substream *substream, |
| 105 | struct snd_soc_dai *dai) |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 106 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 107 | struct ssi_priv *ssi = &ssi_cpu_data[dai->id]; |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 108 | |
| 109 | ssi->inuse = 0; |
| 110 | } |
| 111 | |
Mark Brown | dee89c4 | 2008-11-18 22:11:38 +0000 | [diff] [blame] | 112 | static int ssi_trigger(struct snd_pcm_substream *substream, int cmd, |
| 113 | struct snd_soc_dai *dai) |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 114 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 115 | struct ssi_priv *ssi = &ssi_cpu_data[dai->id]; |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 116 | |
| 117 | switch (cmd) { |
| 118 | case SNDRV_PCM_TRIGGER_START: |
| 119 | SSIREG(SSICR) |= CR_DMAEN | CR_EN; |
| 120 | break; |
| 121 | case SNDRV_PCM_TRIGGER_STOP: |
| 122 | SSIREG(SSICR) &= ~(CR_DMAEN | CR_EN); |
| 123 | break; |
| 124 | default: |
| 125 | return -EINVAL; |
| 126 | } |
| 127 | |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static int ssi_hw_params(struct snd_pcm_substream *substream, |
Mark Brown | dee89c4 | 2008-11-18 22:11:38 +0000 | [diff] [blame] | 132 | struct snd_pcm_hw_params *params, |
| 133 | struct snd_soc_dai *dai) |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 134 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 135 | struct ssi_priv *ssi = &ssi_cpu_data[dai->id]; |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 136 | unsigned long ssicr = SSIREG(SSICR); |
| 137 | unsigned int bits, channels, swl, recv, i; |
| 138 | |
| 139 | channels = params_channels(params); |
| 140 | bits = params->msbits; |
| 141 | recv = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 0 : 1; |
| 142 | |
| 143 | pr_debug("ssi_hw_params() enter\nssicr was %08lx\n", ssicr); |
Roel Kluin | 449bd54 | 2009-05-27 17:08:39 -0700 | [diff] [blame] | 144 | pr_debug("bits: %u channels: %u\n", bits, channels); |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 145 | |
| 146 | ssicr &= ~(CR_TRMD | CR_CHNL_MASK | CR_DWL_MASK | CR_PDTA | |
| 147 | CR_SWL_MASK); |
| 148 | |
| 149 | /* direction (send/receive) */ |
| 150 | if (!recv) |
| 151 | ssicr |= CR_TRMD; /* transmit */ |
| 152 | |
| 153 | /* channels */ |
| 154 | if ((channels < 2) || (channels > 8) || (channels & 1)) { |
| 155 | pr_debug("ssi: invalid number of channels\n"); |
| 156 | return -EINVAL; |
| 157 | } |
| 158 | ssicr |= ((channels >> 1) - 1) << CR_CHNL_SHIFT; |
| 159 | |
| 160 | /* DATA WORD LENGTH (DWL): databits in audio sample */ |
| 161 | i = 0; |
| 162 | switch (bits) { |
| 163 | case 32: ++i; |
| 164 | case 24: ++i; |
| 165 | case 22: ++i; |
| 166 | case 20: ++i; |
| 167 | case 18: ++i; |
| 168 | case 16: ++i; |
| 169 | ssicr |= i << CR_DWL_SHIFT; |
| 170 | case 8: break; |
| 171 | default: |
| 172 | pr_debug("ssi: invalid sample width\n"); |
| 173 | return -EINVAL; |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * SYSTEM WORD LENGTH: size in bits of half a frame over the I2S |
| 178 | * wires. This is usually bits_per_sample x channels/2; i.e. in |
| 179 | * Stereo mode the SWL equals DWL. SWL can be bigger than the |
| 180 | * product of (channels_per_slot x samplebits), e.g. for codecs |
| 181 | * like the AD1939 which only accept 32bit wide TDM slots. For |
| 182 | * "standard" I2S operation we set SWL = chans / 2 * DWL here. |
| 183 | * Waiting for ASoC to get TDM support ;-) |
| 184 | */ |
| 185 | if ((bits > 16) && (bits <= 24)) { |
| 186 | bits = 24; /* these are padded by the SSI */ |
| 187 | /*ssicr |= CR_PDTA;*/ /* cpu/data endianness ? */ |
| 188 | } |
| 189 | i = 0; |
| 190 | swl = (bits * channels) / 2; |
| 191 | switch (swl) { |
| 192 | case 256: ++i; |
| 193 | case 128: ++i; |
| 194 | case 64: ++i; |
| 195 | case 48: ++i; |
| 196 | case 32: ++i; |
| 197 | case 16: ++i; |
| 198 | ssicr |= i << CR_SWL_SHIFT; |
| 199 | case 8: break; |
| 200 | default: |
| 201 | pr_debug("ssi: invalid system word length computed\n"); |
| 202 | return -EINVAL; |
| 203 | } |
| 204 | |
| 205 | SSIREG(SSICR) = ssicr; |
| 206 | |
| 207 | pr_debug("ssi_hw_params() leave\nssicr is now %08lx\n", ssicr); |
| 208 | return 0; |
| 209 | } |
| 210 | |
Liam Girdwood | 5364065 | 2008-07-07 16:08:29 +0100 | [diff] [blame] | 211 | static int ssi_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 212 | unsigned int freq, int dir) |
| 213 | { |
| 214 | struct ssi_priv *ssi = &ssi_cpu_data[cpu_dai->id]; |
| 215 | |
| 216 | ssi->sysclk = freq; |
| 217 | |
| 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * This divider is used to generate the SSI_SCK (I2S bitclock) from the |
| 223 | * clock at the HAC_BIT_CLK ("oversampling clock") pin. |
| 224 | */ |
Liam Girdwood | 5364065 | 2008-07-07 16:08:29 +0100 | [diff] [blame] | 225 | static int ssi_set_clkdiv(struct snd_soc_dai *dai, int did, int div) |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 226 | { |
| 227 | struct ssi_priv *ssi = &ssi_cpu_data[dai->id]; |
| 228 | unsigned long ssicr; |
| 229 | int i; |
| 230 | |
| 231 | i = 0; |
| 232 | ssicr = SSIREG(SSICR) & ~CR_CKDIV_MASK; |
| 233 | switch (div) { |
| 234 | case 16: ++i; |
| 235 | case 8: ++i; |
| 236 | case 4: ++i; |
| 237 | case 2: ++i; |
| 238 | SSIREG(SSICR) = ssicr | (i << CR_CKDIV_SHIFT); |
| 239 | case 1: break; |
| 240 | default: |
| 241 | pr_debug("ssi: invalid sck divider %d\n", div); |
| 242 | return -EINVAL; |
| 243 | } |
| 244 | |
| 245 | return 0; |
| 246 | } |
| 247 | |
Liam Girdwood | 5364065 | 2008-07-07 16:08:29 +0100 | [diff] [blame] | 248 | static int ssi_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 249 | { |
| 250 | struct ssi_priv *ssi = &ssi_cpu_data[dai->id]; |
| 251 | unsigned long ssicr = SSIREG(SSICR); |
| 252 | |
| 253 | pr_debug("ssi_set_fmt()\nssicr was 0x%08lx\n", ssicr); |
| 254 | |
| 255 | ssicr &= ~(CR_DEL | CR_PDTA | CR_BREN | CR_SWSP | CR_SCKP | |
| 256 | CR_SWS_MASTER | CR_SCK_MASTER); |
| 257 | |
| 258 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 259 | case SND_SOC_DAIFMT_I2S: |
| 260 | break; |
| 261 | case SND_SOC_DAIFMT_RIGHT_J: |
| 262 | ssicr |= CR_DEL | CR_PDTA; |
| 263 | break; |
| 264 | case SND_SOC_DAIFMT_LEFT_J: |
| 265 | ssicr |= CR_DEL; |
| 266 | break; |
| 267 | default: |
| 268 | pr_debug("ssi: unsupported format\n"); |
| 269 | return -EINVAL; |
| 270 | } |
| 271 | |
| 272 | switch (fmt & SND_SOC_DAIFMT_CLOCK_MASK) { |
| 273 | case SND_SOC_DAIFMT_CONT: |
| 274 | break; |
| 275 | case SND_SOC_DAIFMT_GATED: |
| 276 | ssicr |= CR_BREN; |
| 277 | break; |
| 278 | } |
| 279 | |
| 280 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| 281 | case SND_SOC_DAIFMT_NB_NF: |
| 282 | ssicr |= CR_SCKP; /* sample data at low clkedge */ |
| 283 | break; |
| 284 | case SND_SOC_DAIFMT_NB_IF: |
| 285 | ssicr |= CR_SCKP | CR_SWSP; |
| 286 | break; |
| 287 | case SND_SOC_DAIFMT_IB_NF: |
| 288 | break; |
| 289 | case SND_SOC_DAIFMT_IB_IF: |
| 290 | ssicr |= CR_SWSP; /* word select starts low */ |
| 291 | break; |
| 292 | default: |
| 293 | pr_debug("ssi: invalid inversion\n"); |
| 294 | return -EINVAL; |
| 295 | } |
| 296 | |
| 297 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 298 | case SND_SOC_DAIFMT_CBM_CFM: |
| 299 | break; |
| 300 | case SND_SOC_DAIFMT_CBS_CFM: |
| 301 | ssicr |= CR_SCK_MASTER; |
| 302 | break; |
| 303 | case SND_SOC_DAIFMT_CBM_CFS: |
| 304 | ssicr |= CR_SWS_MASTER; |
| 305 | break; |
| 306 | case SND_SOC_DAIFMT_CBS_CFS: |
| 307 | ssicr |= CR_SWS_MASTER | CR_SCK_MASTER; |
| 308 | break; |
| 309 | default: |
| 310 | pr_debug("ssi: invalid master/slave configuration\n"); |
| 311 | return -EINVAL; |
| 312 | } |
| 313 | |
| 314 | SSIREG(SSICR) = ssicr; |
| 315 | pr_debug("ssi_set_fmt() leave\nssicr is now 0x%08lx\n", ssicr); |
| 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | /* the SSI depends on an external clocksource (at HAC_BIT_CLK) even in |
| 321 | * Master mode, so really this is board specific; the SSI can do any |
| 322 | * rate with the right bitclk and divider settings. |
| 323 | */ |
| 324 | #define SSI_RATES \ |
| 325 | SNDRV_PCM_RATE_8000_192000 |
| 326 | |
| 327 | /* the SSI can do 8-32 bit samples, with 8 possible channels */ |
| 328 | #define SSI_FMTS \ |
| 329 | (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 | \ |
| 330 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | \ |
| 331 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_U20_3LE | \ |
| 332 | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3LE | \ |
| 333 | SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE) |
| 334 | |
Eric Miao | 6335d05 | 2009-03-03 09:41:00 +0800 | [diff] [blame] | 335 | static struct snd_soc_dai_ops ssi_dai_ops = { |
| 336 | .startup = ssi_startup, |
| 337 | .shutdown = ssi_shutdown, |
| 338 | .trigger = ssi_trigger, |
| 339 | .hw_params = ssi_hw_params, |
| 340 | .set_sysclk = ssi_set_sysclk, |
| 341 | .set_clkdiv = ssi_set_clkdiv, |
| 342 | .set_fmt = ssi_set_fmt, |
| 343 | }; |
| 344 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 345 | struct snd_soc_dai_driver sh4_ssi_dai[] = { |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 346 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 347 | .name = "ssi-dai.0", |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 348 | .playback = { |
| 349 | .rates = SSI_RATES, |
| 350 | .formats = SSI_FMTS, |
| 351 | .channels_min = 2, |
| 352 | .channels_max = 8, |
| 353 | }, |
| 354 | .capture = { |
| 355 | .rates = SSI_RATES, |
| 356 | .formats = SSI_FMTS, |
| 357 | .channels_min = 2, |
| 358 | .channels_max = 8, |
| 359 | }, |
Eric Miao | 6335d05 | 2009-03-03 09:41:00 +0800 | [diff] [blame] | 360 | .ops = &ssi_dai_ops, |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 361 | }, |
| 362 | #ifdef CONFIG_CPU_SUBTYPE_SH7760 |
| 363 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 364 | .name = "ssi-dai.1", |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 365 | .playback = { |
| 366 | .rates = SSI_RATES, |
| 367 | .formats = SSI_FMTS, |
| 368 | .channels_min = 2, |
| 369 | .channels_max = 8, |
| 370 | }, |
| 371 | .capture = { |
| 372 | .rates = SSI_RATES, |
| 373 | .formats = SSI_FMTS, |
| 374 | .channels_min = 2, |
| 375 | .channels_max = 8, |
| 376 | }, |
Eric Miao | 6335d05 | 2009-03-03 09:41:00 +0800 | [diff] [blame] | 377 | .ops = &ssi_dai_ops, |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 378 | }, |
| 379 | #endif |
| 380 | }; |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 381 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 382 | static int __devinit sh4_soc_dai_probe(struct platform_device *pdev) |
Mark Brown | 3f4b783 | 2008-12-03 19:26:35 +0000 | [diff] [blame] | 383 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 384 | return snd_soc_register_dais(&pdev->dev, sh4_ssi_dai, |
| 385 | ARRAY_SIZE(sh4_ssi_dai)); |
Mark Brown | 3f4b783 | 2008-12-03 19:26:35 +0000 | [diff] [blame] | 386 | } |
Mark Brown | 3f4b783 | 2008-12-03 19:26:35 +0000 | [diff] [blame] | 387 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 388 | static int __devexit sh4_soc_dai_remove(struct platform_device *pdev) |
Mark Brown | 3f4b783 | 2008-12-03 19:26:35 +0000 | [diff] [blame] | 389 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 390 | snd_soc_unregister_dai(&pdev->dev, ARRAY_SIZE(sh4_ssi_dai)); |
| 391 | return 0; |
Mark Brown | 3f4b783 | 2008-12-03 19:26:35 +0000 | [diff] [blame] | 392 | } |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 393 | |
| 394 | static struct platform_driver sh4_ssi_driver = { |
| 395 | .driver = { |
| 396 | .name = "sh4-ssi-dai", |
| 397 | .owner = THIS_MODULE, |
| 398 | }, |
| 399 | |
| 400 | .probe = sh4_soc_dai_probe, |
| 401 | .remove = __devexit_p(sh4_soc_dai_remove), |
| 402 | }; |
| 403 | |
| 404 | static int __init snd_sh4_ssi_init(void) |
| 405 | { |
| 406 | return platform_driver_register(&sh4_ssi_driver); |
| 407 | } |
| 408 | module_init(snd_sh4_ssi_init); |
| 409 | |
| 410 | static void __exit snd_sh4_ssi_exit(void) |
| 411 | { |
| 412 | platform_driver_unregister(&sh4_ssi_driver); |
| 413 | } |
| 414 | module_exit(snd_sh4_ssi_exit); |
Mark Brown | 3f4b783 | 2008-12-03 19:26:35 +0000 | [diff] [blame] | 415 | |
Manuel Lauss | aef3b06 | 2007-05-14 18:40:07 +0200 | [diff] [blame] | 416 | MODULE_LICENSE("GPL"); |
| 417 | MODULE_DESCRIPTION("SuperH onchip SSI (I2S) audio driver"); |
| 418 | MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>"); |