Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Au12x0/Au1550 PSC ALSA ASoC audio support. |
| 3 | * |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 4 | * (c) 2007-2009 MSC Vertriebsges.m.b.H., |
| 5 | * Manuel Lauss <manuel.lauss@gmail.com> |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * Au1xxx-PSC AC97 glue. |
| 12 | * |
| 13 | * NOTE: all of these drivers can only work with a SINGLE instance |
| 14 | * of a PSC. Multiple independent audio devices are impossible |
| 15 | * with ASoC v1. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/device.h> |
| 21 | #include <linux/delay.h> |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 22 | #include <linux/mutex.h> |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 23 | #include <linux/suspend.h> |
| 24 | #include <sound/core.h> |
| 25 | #include <sound/pcm.h> |
| 26 | #include <sound/initval.h> |
| 27 | #include <sound/soc.h> |
| 28 | #include <asm/mach-au1x00/au1000.h> |
| 29 | #include <asm/mach-au1x00/au1xxx_psc.h> |
| 30 | |
| 31 | #include "psc.h" |
| 32 | |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 33 | /* how often to retry failed codec register reads/writes */ |
| 34 | #define AC97_RW_RETRIES 5 |
| 35 | |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 36 | #define AC97_DIR \ |
| 37 | (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE) |
| 38 | |
| 39 | #define AC97_RATES \ |
| 40 | SNDRV_PCM_RATE_8000_48000 |
| 41 | |
| 42 | #define AC97_FMTS \ |
| 43 | (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3BE) |
| 44 | |
| 45 | #define AC97PCR_START(stype) \ |
| 46 | ((stype) == PCM_TX ? PSC_AC97PCR_TS : PSC_AC97PCR_RS) |
| 47 | #define AC97PCR_STOP(stype) \ |
| 48 | ((stype) == PCM_TX ? PSC_AC97PCR_TP : PSC_AC97PCR_RP) |
| 49 | #define AC97PCR_CLRFIFO(stype) \ |
| 50 | ((stype) == PCM_TX ? PSC_AC97PCR_TC : PSC_AC97PCR_RC) |
| 51 | |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 52 | #define AC97STAT_BUSY(stype) \ |
| 53 | ((stype) == PCM_TX ? PSC_AC97STAT_TB : PSC_AC97STAT_RB) |
| 54 | |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 55 | /* instance data. There can be only one, MacLeod!!!! */ |
| 56 | static struct au1xpsc_audio_data *au1xpsc_ac97_workdata; |
| 57 | |
| 58 | /* AC97 controller reads codec register */ |
| 59 | static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97, |
| 60 | unsigned short reg) |
| 61 | { |
| 62 | /* FIXME */ |
| 63 | struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata; |
Manuel Lauss | e697cd4 | 2009-10-19 16:10:58 +0200 | [diff] [blame^] | 64 | unsigned short retry, tmo; |
| 65 | unsigned long data; |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 66 | |
| 67 | au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); |
| 68 | au_sync(); |
| 69 | |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 70 | retry = AC97_RW_RETRIES; |
| 71 | do { |
| 72 | mutex_lock(&pscdata->lock); |
| 73 | |
| 74 | au_writel(PSC_AC97CDC_RD | PSC_AC97CDC_INDX(reg), |
| 75 | AC97_CDC(pscdata)); |
| 76 | au_sync(); |
| 77 | |
| 78 | tmo = 2000; |
| 79 | while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)) |
| 80 | && --tmo) |
| 81 | udelay(2); |
| 82 | |
Manuel Lauss | e697cd4 | 2009-10-19 16:10:58 +0200 | [diff] [blame^] | 83 | data = au_readl(AC97_CDC(pscdata)); |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 84 | |
| 85 | au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); |
| 86 | au_sync(); |
| 87 | |
| 88 | mutex_unlock(&pscdata->lock); |
Manuel Lauss | e697cd4 | 2009-10-19 16:10:58 +0200 | [diff] [blame^] | 89 | |
| 90 | if (reg != ((data >> 16) & 0x7f)) |
| 91 | tmo = 1; /* wrong register, try again */ |
| 92 | |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 93 | } while (--retry && !tmo); |
| 94 | |
Manuel Lauss | e697cd4 | 2009-10-19 16:10:58 +0200 | [diff] [blame^] | 95 | return retry ? data & 0xffff : 0xffff; |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | /* AC97 controller writes to codec register */ |
| 99 | static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg, |
| 100 | unsigned short val) |
| 101 | { |
| 102 | /* FIXME */ |
| 103 | struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata; |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 104 | unsigned int tmo, retry; |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 105 | |
| 106 | au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); |
| 107 | au_sync(); |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 108 | |
| 109 | retry = AC97_RW_RETRIES; |
| 110 | do { |
| 111 | mutex_lock(&pscdata->lock); |
| 112 | |
| 113 | au_writel(PSC_AC97CDC_INDX(reg) | (val & 0xffff), |
| 114 | AC97_CDC(pscdata)); |
| 115 | au_sync(); |
| 116 | |
| 117 | tmo = 2000; |
| 118 | while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)) |
| 119 | && --tmo) |
| 120 | udelay(2); |
| 121 | |
| 122 | au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); |
| 123 | au_sync(); |
| 124 | |
| 125 | mutex_unlock(&pscdata->lock); |
| 126 | } while (--retry && !tmo); |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | /* AC97 controller asserts a warm reset */ |
| 130 | static void au1xpsc_ac97_warm_reset(struct snd_ac97 *ac97) |
| 131 | { |
| 132 | /* FIXME */ |
| 133 | struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata; |
| 134 | |
| 135 | au_writel(PSC_AC97RST_SNC, AC97_RST(pscdata)); |
| 136 | au_sync(); |
| 137 | msleep(10); |
| 138 | au_writel(0, AC97_RST(pscdata)); |
| 139 | au_sync(); |
| 140 | } |
| 141 | |
| 142 | static void au1xpsc_ac97_cold_reset(struct snd_ac97 *ac97) |
| 143 | { |
| 144 | /* FIXME */ |
| 145 | struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata; |
| 146 | int i; |
| 147 | |
| 148 | /* disable PSC during cold reset */ |
| 149 | au_writel(0, AC97_CFG(au1xpsc_ac97_workdata)); |
| 150 | au_sync(); |
| 151 | au_writel(PSC_CTRL_DISABLE, PSC_CTRL(pscdata)); |
| 152 | au_sync(); |
| 153 | |
| 154 | /* issue cold reset */ |
| 155 | au_writel(PSC_AC97RST_RST, AC97_RST(pscdata)); |
| 156 | au_sync(); |
| 157 | msleep(500); |
| 158 | au_writel(0, AC97_RST(pscdata)); |
| 159 | au_sync(); |
| 160 | |
| 161 | /* enable PSC */ |
| 162 | au_writel(PSC_CTRL_ENABLE, PSC_CTRL(pscdata)); |
| 163 | au_sync(); |
| 164 | |
| 165 | /* wait for PSC to indicate it's ready */ |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 166 | i = 1000; |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 167 | while (!((au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_SR)) && (--i)) |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 168 | msleep(1); |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 169 | |
| 170 | if (i == 0) { |
| 171 | printk(KERN_ERR "au1xpsc-ac97: PSC not ready!\n"); |
| 172 | return; |
| 173 | } |
| 174 | |
| 175 | /* enable the ac97 function */ |
| 176 | au_writel(pscdata->cfg | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata)); |
| 177 | au_sync(); |
| 178 | |
| 179 | /* wait for AC97 core to become ready */ |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 180 | i = 1000; |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 181 | while (!((au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && (--i)) |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 182 | msleep(1); |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 183 | if (i == 0) |
| 184 | printk(KERN_ERR "au1xpsc-ac97: AC97 ctrl not ready\n"); |
| 185 | } |
| 186 | |
| 187 | /* AC97 controller operations */ |
| 188 | struct snd_ac97_bus_ops soc_ac97_ops = { |
| 189 | .read = au1xpsc_ac97_read, |
| 190 | .write = au1xpsc_ac97_write, |
| 191 | .reset = au1xpsc_ac97_cold_reset, |
| 192 | .warm_reset = au1xpsc_ac97_warm_reset, |
| 193 | }; |
| 194 | EXPORT_SYMBOL_GPL(soc_ac97_ops); |
| 195 | |
| 196 | static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream, |
Mark Brown | dee89c4 | 2008-11-18 22:11:38 +0000 | [diff] [blame] | 197 | struct snd_pcm_hw_params *params, |
| 198 | struct snd_soc_dai *dai) |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 199 | { |
| 200 | /* FIXME */ |
| 201 | struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata; |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 202 | unsigned long r, ro, stat; |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 203 | int chans, stype = SUBSTREAM_TYPE(substream); |
| 204 | |
| 205 | chans = params_channels(params); |
| 206 | |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 207 | r = ro = au_readl(AC97_CFG(pscdata)); |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 208 | stat = au_readl(AC97_STAT(pscdata)); |
| 209 | |
| 210 | /* already active? */ |
| 211 | if (stat & (PSC_AC97STAT_TB | PSC_AC97STAT_RB)) { |
| 212 | /* reject parameters not currently set up */ |
| 213 | if ((PSC_AC97CFG_GET_LEN(r) != params->msbits) || |
| 214 | (pscdata->rate != params_rate(params))) |
| 215 | return -EINVAL; |
| 216 | } else { |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 217 | |
| 218 | /* set sample bitdepth: REG[24:21]=(BITS-2)/2 */ |
| 219 | r &= ~PSC_AC97CFG_LEN_MASK; |
| 220 | r |= PSC_AC97CFG_SET_LEN(params->msbits); |
| 221 | |
| 222 | /* channels: enable slots for front L/R channel */ |
| 223 | if (stype == PCM_TX) { |
| 224 | r &= ~PSC_AC97CFG_TXSLOT_MASK; |
| 225 | r |= PSC_AC97CFG_TXSLOT_ENA(3); |
| 226 | r |= PSC_AC97CFG_TXSLOT_ENA(4); |
| 227 | } else { |
| 228 | r &= ~PSC_AC97CFG_RXSLOT_MASK; |
| 229 | r |= PSC_AC97CFG_RXSLOT_ENA(3); |
| 230 | r |= PSC_AC97CFG_RXSLOT_ENA(4); |
| 231 | } |
| 232 | |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 233 | /* do we need to poke the hardware? */ |
| 234 | if (!(r ^ ro)) |
| 235 | goto out; |
| 236 | |
| 237 | /* ac97 engine is about to be disabled */ |
| 238 | mutex_lock(&pscdata->lock); |
| 239 | |
| 240 | /* disable AC97 device controller first... */ |
| 241 | au_writel(r & ~PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata)); |
| 242 | au_sync(); |
| 243 | |
| 244 | /* ...wait for it... */ |
| 245 | while (au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR) |
| 246 | asm volatile ("nop"); |
| 247 | |
| 248 | /* ...write config... */ |
| 249 | au_writel(r, AC97_CFG(pscdata)); |
| 250 | au_sync(); |
| 251 | |
| 252 | /* ...enable the AC97 controller again... */ |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 253 | au_writel(r | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata)); |
| 254 | au_sync(); |
| 255 | |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 256 | /* ...and wait for ready bit */ |
| 257 | while (!(au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) |
| 258 | asm volatile ("nop"); |
| 259 | |
| 260 | mutex_unlock(&pscdata->lock); |
| 261 | |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 262 | pscdata->cfg = r; |
| 263 | pscdata->rate = params_rate(params); |
| 264 | } |
| 265 | |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 266 | out: |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream, |
Mark Brown | dee89c4 | 2008-11-18 22:11:38 +0000 | [diff] [blame] | 271 | int cmd, struct snd_soc_dai *dai) |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 272 | { |
| 273 | /* FIXME */ |
| 274 | struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata; |
| 275 | int ret, stype = SUBSTREAM_TYPE(substream); |
| 276 | |
| 277 | ret = 0; |
| 278 | |
| 279 | switch (cmd) { |
| 280 | case SNDRV_PCM_TRIGGER_START: |
| 281 | case SNDRV_PCM_TRIGGER_RESUME: |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 282 | au_writel(AC97PCR_CLRFIFO(stype), AC97_PCR(pscdata)); |
| 283 | au_sync(); |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 284 | au_writel(AC97PCR_START(stype), AC97_PCR(pscdata)); |
| 285 | au_sync(); |
| 286 | break; |
| 287 | case SNDRV_PCM_TRIGGER_STOP: |
| 288 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 289 | au_writel(AC97PCR_STOP(stype), AC97_PCR(pscdata)); |
| 290 | au_sync(); |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 291 | |
| 292 | while (au_readl(AC97_STAT(pscdata)) & AC97STAT_BUSY(stype)) |
| 293 | asm volatile ("nop"); |
| 294 | |
| 295 | au_writel(AC97PCR_CLRFIFO(stype), AC97_PCR(pscdata)); |
| 296 | au_sync(); |
| 297 | |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 298 | break; |
| 299 | default: |
| 300 | ret = -EINVAL; |
| 301 | } |
| 302 | return ret; |
| 303 | } |
| 304 | |
| 305 | static int au1xpsc_ac97_probe(struct platform_device *pdev, |
| 306 | struct snd_soc_dai *dai) |
| 307 | { |
| 308 | int ret; |
| 309 | struct resource *r; |
| 310 | unsigned long sel; |
| 311 | |
| 312 | if (au1xpsc_ac97_workdata) |
| 313 | return -EBUSY; |
| 314 | |
| 315 | au1xpsc_ac97_workdata = |
| 316 | kzalloc(sizeof(struct au1xpsc_audio_data), GFP_KERNEL); |
| 317 | if (!au1xpsc_ac97_workdata) |
| 318 | return -ENOMEM; |
| 319 | |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 320 | mutex_init(&au1xpsc_ac97_workdata->lock); |
| 321 | |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 322 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 323 | if (!r) { |
| 324 | ret = -ENODEV; |
| 325 | goto out0; |
| 326 | } |
| 327 | |
| 328 | ret = -EBUSY; |
| 329 | au1xpsc_ac97_workdata->ioarea = |
| 330 | request_mem_region(r->start, r->end - r->start + 1, |
| 331 | "au1xpsc_ac97"); |
| 332 | if (!au1xpsc_ac97_workdata->ioarea) |
| 333 | goto out0; |
| 334 | |
| 335 | au1xpsc_ac97_workdata->mmio = ioremap(r->start, 0xffff); |
| 336 | if (!au1xpsc_ac97_workdata->mmio) |
| 337 | goto out1; |
| 338 | |
| 339 | /* configuration: max dma trigger threshold, enable ac97 */ |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 340 | au1xpsc_ac97_workdata->cfg = PSC_AC97CFG_RT_FIFO8 | |
| 341 | PSC_AC97CFG_TT_FIFO8 | |
| 342 | PSC_AC97CFG_DE_ENABLE; |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 343 | |
| 344 | /* preserve PSC clock source set up by platform (dev.platform_data |
| 345 | * is already occupied by soc layer) |
| 346 | */ |
| 347 | sel = au_readl(PSC_SEL(au1xpsc_ac97_workdata)) & PSC_SEL_CLK_MASK; |
| 348 | au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata)); |
| 349 | au_sync(); |
| 350 | au_writel(0, PSC_SEL(au1xpsc_ac97_workdata)); |
| 351 | au_sync(); |
| 352 | au_writel(PSC_SEL_PS_AC97MODE | sel, PSC_SEL(au1xpsc_ac97_workdata)); |
| 353 | au_sync(); |
| 354 | /* next up: cold reset. Dont check for PSC-ready now since |
| 355 | * there may not be any codec clock yet. |
| 356 | */ |
| 357 | |
| 358 | return 0; |
| 359 | |
| 360 | out1: |
| 361 | release_resource(au1xpsc_ac97_workdata->ioarea); |
| 362 | kfree(au1xpsc_ac97_workdata->ioarea); |
| 363 | out0: |
| 364 | kfree(au1xpsc_ac97_workdata); |
| 365 | au1xpsc_ac97_workdata = NULL; |
| 366 | return ret; |
| 367 | } |
| 368 | |
| 369 | static void au1xpsc_ac97_remove(struct platform_device *pdev, |
| 370 | struct snd_soc_dai *dai) |
| 371 | { |
| 372 | /* disable PSC completely */ |
| 373 | au_writel(0, AC97_CFG(au1xpsc_ac97_workdata)); |
| 374 | au_sync(); |
| 375 | au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata)); |
| 376 | au_sync(); |
| 377 | |
| 378 | iounmap(au1xpsc_ac97_workdata->mmio); |
| 379 | release_resource(au1xpsc_ac97_workdata->ioarea); |
| 380 | kfree(au1xpsc_ac97_workdata->ioarea); |
| 381 | kfree(au1xpsc_ac97_workdata); |
| 382 | au1xpsc_ac97_workdata = NULL; |
| 383 | } |
| 384 | |
Mark Brown | dc7d7b8 | 2008-12-03 18:21:52 +0000 | [diff] [blame] | 385 | static int au1xpsc_ac97_suspend(struct snd_soc_dai *dai) |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 386 | { |
| 387 | /* save interesting registers and disable PSC */ |
| 388 | au1xpsc_ac97_workdata->pm[0] = |
| 389 | au_readl(PSC_SEL(au1xpsc_ac97_workdata)); |
| 390 | |
| 391 | au_writel(0, AC97_CFG(au1xpsc_ac97_workdata)); |
| 392 | au_sync(); |
| 393 | au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata)); |
| 394 | au_sync(); |
| 395 | |
| 396 | return 0; |
| 397 | } |
| 398 | |
Mark Brown | dc7d7b8 | 2008-12-03 18:21:52 +0000 | [diff] [blame] | 399 | static int au1xpsc_ac97_resume(struct snd_soc_dai *dai) |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 400 | { |
| 401 | /* restore PSC clock config */ |
| 402 | au_writel(au1xpsc_ac97_workdata->pm[0] | PSC_SEL_PS_AC97MODE, |
| 403 | PSC_SEL(au1xpsc_ac97_workdata)); |
| 404 | au_sync(); |
| 405 | |
| 406 | /* after this point the ac97 core will cold-reset the codec. |
| 407 | * During cold-reset the PSC is reinitialized and the last |
| 408 | * configuration set up in hw_params() is restored. |
| 409 | */ |
| 410 | return 0; |
| 411 | } |
| 412 | |
Eric Miao | 6335d05 | 2009-03-03 09:41:00 +0800 | [diff] [blame] | 413 | static struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = { |
| 414 | .trigger = au1xpsc_ac97_trigger, |
| 415 | .hw_params = au1xpsc_ac97_hw_params, |
| 416 | }; |
| 417 | |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 418 | struct snd_soc_dai au1xpsc_ac97_dai = { |
| 419 | .name = "au1xpsc_ac97", |
Mark Brown | 3ba9e10a | 2008-11-24 18:01:05 +0000 | [diff] [blame] | 420 | .ac97_control = 1, |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 421 | .probe = au1xpsc_ac97_probe, |
| 422 | .remove = au1xpsc_ac97_remove, |
| 423 | .suspend = au1xpsc_ac97_suspend, |
| 424 | .resume = au1xpsc_ac97_resume, |
| 425 | .playback = { |
| 426 | .rates = AC97_RATES, |
| 427 | .formats = AC97_FMTS, |
| 428 | .channels_min = 2, |
| 429 | .channels_max = 2, |
| 430 | }, |
| 431 | .capture = { |
| 432 | .rates = AC97_RATES, |
| 433 | .formats = AC97_FMTS, |
| 434 | .channels_min = 2, |
| 435 | .channels_max = 2, |
| 436 | }, |
Eric Miao | 6335d05 | 2009-03-03 09:41:00 +0800 | [diff] [blame] | 437 | .ops = &au1xpsc_ac97_dai_ops, |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 438 | }; |
| 439 | EXPORT_SYMBOL_GPL(au1xpsc_ac97_dai); |
| 440 | |
| 441 | static int __init au1xpsc_ac97_init(void) |
| 442 | { |
| 443 | au1xpsc_ac97_workdata = NULL; |
Mark Brown | 3f4b783 | 2008-12-03 19:26:35 +0000 | [diff] [blame] | 444 | return snd_soc_register_dai(&au1xpsc_ac97_dai); |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 445 | } |
| 446 | |
| 447 | static void __exit au1xpsc_ac97_exit(void) |
| 448 | { |
Mark Brown | 3f4b783 | 2008-12-03 19:26:35 +0000 | [diff] [blame] | 449 | snd_soc_unregister_dai(&au1xpsc_ac97_dai); |
Manuel Lauss | 4a161d2 | 2008-07-09 16:27:56 +0200 | [diff] [blame] | 450 | } |
| 451 | |
| 452 | module_init(au1xpsc_ac97_init); |
| 453 | module_exit(au1xpsc_ac97_exit); |
| 454 | |
| 455 | MODULE_LICENSE("GPL"); |
| 456 | MODULE_DESCRIPTION("Au12x0/Au1550 PSC AC97 ALSA ASoC audio driver"); |
Manuel Lauss | cdc65fb | 2009-09-08 19:45:17 +0200 | [diff] [blame] | 457 | MODULE_AUTHOR("Manuel Lauss <manuel.lauss@gmail.com>"); |