Commit | Line | Data |
---|---|---|
4a161d23 ML |
1 | /* |
2 | * Au12x0/Au1550 PSC ALSA ASoC audio support. | |
3 | * | |
cdc65fbe ML |
4 | * (c) 2007-2009 MSC Vertriebsges.m.b.H., |
5 | * Manuel Lauss <manuel.lauss@gmail.com> | |
4a161d23 ML |
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 | * | |
4a161d23 ML |
13 | */ |
14 | ||
15 | #include <linux/init.h> | |
16 | #include <linux/module.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
4a161d23 ML |
18 | #include <linux/device.h> |
19 | #include <linux/delay.h> | |
cdc65fbe | 20 | #include <linux/mutex.h> |
4a161d23 ML |
21 | #include <linux/suspend.h> |
22 | #include <sound/core.h> | |
23 | #include <sound/pcm.h> | |
24 | #include <sound/initval.h> | |
25 | #include <sound/soc.h> | |
26 | #include <asm/mach-au1x00/au1000.h> | |
27 | #include <asm/mach-au1x00/au1xxx_psc.h> | |
28 | ||
29 | #include "psc.h" | |
30 | ||
cdc65fbe ML |
31 | /* how often to retry failed codec register reads/writes */ |
32 | #define AC97_RW_RETRIES 5 | |
33 | ||
4a161d23 ML |
34 | #define AC97_DIR \ |
35 | (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE) | |
36 | ||
37 | #define AC97_RATES \ | |
38 | SNDRV_PCM_RATE_8000_48000 | |
39 | ||
40 | #define AC97_FMTS \ | |
41 | (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3BE) | |
42 | ||
43 | #define AC97PCR_START(stype) \ | |
25942fdc | 44 | ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97PCR_TS : PSC_AC97PCR_RS) |
4a161d23 | 45 | #define AC97PCR_STOP(stype) \ |
25942fdc | 46 | ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97PCR_TP : PSC_AC97PCR_RP) |
4a161d23 | 47 | #define AC97PCR_CLRFIFO(stype) \ |
25942fdc | 48 | ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97PCR_TC : PSC_AC97PCR_RC) |
4a161d23 | 49 | |
cdc65fbe | 50 | #define AC97STAT_BUSY(stype) \ |
25942fdc | 51 | ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97STAT_TB : PSC_AC97STAT_RB) |
cdc65fbe | 52 | |
4a161d23 ML |
53 | /* instance data. There can be only one, MacLeod!!!! */ |
54 | static struct au1xpsc_audio_data *au1xpsc_ac97_workdata; | |
55 | ||
ffc4fdbb ML |
56 | #if 0 |
57 | ||
58 | /* this could theoretically work, but ac97->bus->card->private_data can be NULL | |
59 | * when snd_ac97_mixer() is called; I don't know if the rest further down the | |
60 | * chain are always valid either. | |
61 | */ | |
62 | static inline struct au1xpsc_audio_data *ac97_to_pscdata(struct snd_ac97 *x) | |
63 | { | |
64 | struct snd_soc_card *c = x->bus->card->private_data; | |
65 | return snd_soc_dai_get_drvdata(c->rtd->cpu_dai); | |
66 | } | |
67 | ||
68 | #else | |
69 | ||
70 | #define ac97_to_pscdata(x) au1xpsc_ac97_workdata | |
71 | ||
72 | #endif | |
73 | ||
4a161d23 ML |
74 | /* AC97 controller reads codec register */ |
75 | static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97, | |
76 | unsigned short reg) | |
77 | { | |
ffc4fdbb | 78 | struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97); |
e697cd41 ML |
79 | unsigned short retry, tmo; |
80 | unsigned long data; | |
4a161d23 | 81 | |
2f73bfbe ML |
82 | __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); |
83 | wmb(); /* drain writebuffer */ | |
4a161d23 | 84 | |
cdc65fbe ML |
85 | retry = AC97_RW_RETRIES; |
86 | do { | |
87 | mutex_lock(&pscdata->lock); | |
88 | ||
2f73bfbe | 89 | __raw_writel(PSC_AC97CDC_RD | PSC_AC97CDC_INDX(reg), |
cdc65fbe | 90 | AC97_CDC(pscdata)); |
2f73bfbe | 91 | wmb(); /* drain writebuffer */ |
cdc65fbe | 92 | |
8d567b6b ML |
93 | tmo = 20; |
94 | do { | |
95 | udelay(21); | |
2f73bfbe | 96 | if (__raw_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD) |
8d567b6b ML |
97 | break; |
98 | } while (--tmo); | |
4a161d23 | 99 | |
2f73bfbe | 100 | data = __raw_readl(AC97_CDC(pscdata)); |
4a161d23 | 101 | |
2f73bfbe ML |
102 | __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); |
103 | wmb(); /* drain writebuffer */ | |
cdc65fbe ML |
104 | |
105 | mutex_unlock(&pscdata->lock); | |
e697cd41 ML |
106 | |
107 | if (reg != ((data >> 16) & 0x7f)) | |
108 | tmo = 1; /* wrong register, try again */ | |
109 | ||
cdc65fbe | 110 | } while (--retry && !tmo); |
4a161d23 | 111 | |
e697cd41 | 112 | return retry ? data & 0xffff : 0xffff; |
4a161d23 ML |
113 | } |
114 | ||
115 | /* AC97 controller writes to codec register */ | |
116 | static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg, | |
117 | unsigned short val) | |
118 | { | |
ffc4fdbb | 119 | struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97); |
cdc65fbe | 120 | unsigned int tmo, retry; |
4a161d23 | 121 | |
2f73bfbe ML |
122 | __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); |
123 | wmb(); /* drain writebuffer */ | |
cdc65fbe ML |
124 | |
125 | retry = AC97_RW_RETRIES; | |
126 | do { | |
127 | mutex_lock(&pscdata->lock); | |
128 | ||
2f73bfbe | 129 | __raw_writel(PSC_AC97CDC_INDX(reg) | (val & 0xffff), |
cdc65fbe | 130 | AC97_CDC(pscdata)); |
2f73bfbe | 131 | wmb(); /* drain writebuffer */ |
4a161d23 | 132 | |
8d567b6b ML |
133 | tmo = 20; |
134 | do { | |
135 | udelay(21); | |
2f73bfbe | 136 | if (__raw_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD) |
8d567b6b ML |
137 | break; |
138 | } while (--tmo); | |
cdc65fbe | 139 | |
2f73bfbe ML |
140 | __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); |
141 | wmb(); /* drain writebuffer */ | |
cdc65fbe ML |
142 | |
143 | mutex_unlock(&pscdata->lock); | |
144 | } while (--retry && !tmo); | |
4a161d23 ML |
145 | } |
146 | ||
147 | /* AC97 controller asserts a warm reset */ | |
148 | static void au1xpsc_ac97_warm_reset(struct snd_ac97 *ac97) | |
149 | { | |
ffc4fdbb | 150 | struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97); |
4a161d23 | 151 | |
2f73bfbe ML |
152 | __raw_writel(PSC_AC97RST_SNC, AC97_RST(pscdata)); |
153 | wmb(); /* drain writebuffer */ | |
4a161d23 | 154 | msleep(10); |
2f73bfbe ML |
155 | __raw_writel(0, AC97_RST(pscdata)); |
156 | wmb(); /* drain writebuffer */ | |
4a161d23 ML |
157 | } |
158 | ||
159 | static void au1xpsc_ac97_cold_reset(struct snd_ac97 *ac97) | |
160 | { | |
ffc4fdbb | 161 | struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97); |
4a161d23 ML |
162 | int i; |
163 | ||
164 | /* disable PSC during cold reset */ | |
2f73bfbe ML |
165 | __raw_writel(0, AC97_CFG(au1xpsc_ac97_workdata)); |
166 | wmb(); /* drain writebuffer */ | |
167 | __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(pscdata)); | |
168 | wmb(); /* drain writebuffer */ | |
4a161d23 ML |
169 | |
170 | /* issue cold reset */ | |
2f73bfbe ML |
171 | __raw_writel(PSC_AC97RST_RST, AC97_RST(pscdata)); |
172 | wmb(); /* drain writebuffer */ | |
4a161d23 | 173 | msleep(500); |
2f73bfbe ML |
174 | __raw_writel(0, AC97_RST(pscdata)); |
175 | wmb(); /* drain writebuffer */ | |
4a161d23 ML |
176 | |
177 | /* enable PSC */ | |
2f73bfbe ML |
178 | __raw_writel(PSC_CTRL_ENABLE, PSC_CTRL(pscdata)); |
179 | wmb(); /* drain writebuffer */ | |
4a161d23 ML |
180 | |
181 | /* wait for PSC to indicate it's ready */ | |
cdc65fbe | 182 | i = 1000; |
2f73bfbe | 183 | while (!((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_SR)) && (--i)) |
cdc65fbe | 184 | msleep(1); |
4a161d23 ML |
185 | |
186 | if (i == 0) { | |
187 | printk(KERN_ERR "au1xpsc-ac97: PSC not ready!\n"); | |
188 | return; | |
189 | } | |
190 | ||
191 | /* enable the ac97 function */ | |
2f73bfbe ML |
192 | __raw_writel(pscdata->cfg | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata)); |
193 | wmb(); /* drain writebuffer */ | |
4a161d23 ML |
194 | |
195 | /* wait for AC97 core to become ready */ | |
cdc65fbe | 196 | i = 1000; |
2f73bfbe | 197 | while (!((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && (--i)) |
cdc65fbe | 198 | msleep(1); |
4a161d23 ML |
199 | if (i == 0) |
200 | printk(KERN_ERR "au1xpsc-ac97: AC97 ctrl not ready\n"); | |
201 | } | |
202 | ||
203 | /* AC97 controller operations */ | |
b047e1cc | 204 | static struct snd_ac97_bus_ops psc_ac97_ops = { |
4a161d23 ML |
205 | .read = au1xpsc_ac97_read, |
206 | .write = au1xpsc_ac97_write, | |
207 | .reset = au1xpsc_ac97_cold_reset, | |
208 | .warm_reset = au1xpsc_ac97_warm_reset, | |
209 | }; | |
4a161d23 ML |
210 | |
211 | static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
212 | struct snd_pcm_hw_params *params, |
213 | struct snd_soc_dai *dai) | |
4a161d23 | 214 | { |
ffc4fdbb | 215 | struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai); |
cdc65fbe | 216 | unsigned long r, ro, stat; |
25942fdc | 217 | int chans, t, stype = substream->stream; |
4a161d23 ML |
218 | |
219 | chans = params_channels(params); | |
220 | ||
2f73bfbe ML |
221 | r = ro = __raw_readl(AC97_CFG(pscdata)); |
222 | stat = __raw_readl(AC97_STAT(pscdata)); | |
4a161d23 ML |
223 | |
224 | /* already active? */ | |
225 | if (stat & (PSC_AC97STAT_TB | PSC_AC97STAT_RB)) { | |
226 | /* reject parameters not currently set up */ | |
227 | if ((PSC_AC97CFG_GET_LEN(r) != params->msbits) || | |
228 | (pscdata->rate != params_rate(params))) | |
229 | return -EINVAL; | |
230 | } else { | |
4a161d23 ML |
231 | |
232 | /* set sample bitdepth: REG[24:21]=(BITS-2)/2 */ | |
233 | r &= ~PSC_AC97CFG_LEN_MASK; | |
234 | r |= PSC_AC97CFG_SET_LEN(params->msbits); | |
235 | ||
236 | /* channels: enable slots for front L/R channel */ | |
25942fdc | 237 | if (stype == SNDRV_PCM_STREAM_PLAYBACK) { |
4a161d23 ML |
238 | r &= ~PSC_AC97CFG_TXSLOT_MASK; |
239 | r |= PSC_AC97CFG_TXSLOT_ENA(3); | |
240 | r |= PSC_AC97CFG_TXSLOT_ENA(4); | |
241 | } else { | |
242 | r &= ~PSC_AC97CFG_RXSLOT_MASK; | |
243 | r |= PSC_AC97CFG_RXSLOT_ENA(3); | |
244 | r |= PSC_AC97CFG_RXSLOT_ENA(4); | |
245 | } | |
246 | ||
cdc65fbe ML |
247 | /* do we need to poke the hardware? */ |
248 | if (!(r ^ ro)) | |
249 | goto out; | |
250 | ||
251 | /* ac97 engine is about to be disabled */ | |
252 | mutex_lock(&pscdata->lock); | |
253 | ||
254 | /* disable AC97 device controller first... */ | |
2f73bfbe ML |
255 | __raw_writel(r & ~PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata)); |
256 | wmb(); /* drain writebuffer */ | |
cdc65fbe ML |
257 | |
258 | /* ...wait for it... */ | |
8d567b6b | 259 | t = 100; |
2f73bfbe | 260 | while ((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR) && --t) |
8d567b6b ML |
261 | msleep(1); |
262 | ||
263 | if (!t) | |
264 | printk(KERN_ERR "PSC-AC97: can't disable!\n"); | |
cdc65fbe ML |
265 | |
266 | /* ...write config... */ | |
2f73bfbe ML |
267 | __raw_writel(r, AC97_CFG(pscdata)); |
268 | wmb(); /* drain writebuffer */ | |
cdc65fbe ML |
269 | |
270 | /* ...enable the AC97 controller again... */ | |
2f73bfbe ML |
271 | __raw_writel(r | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata)); |
272 | wmb(); /* drain writebuffer */ | |
4a161d23 | 273 | |
cdc65fbe | 274 | /* ...and wait for ready bit */ |
8d567b6b | 275 | t = 100; |
2f73bfbe | 276 | while ((!(__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && --t) |
8d567b6b ML |
277 | msleep(1); |
278 | ||
279 | if (!t) | |
280 | printk(KERN_ERR "PSC-AC97: can't enable!\n"); | |
cdc65fbe ML |
281 | |
282 | mutex_unlock(&pscdata->lock); | |
283 | ||
4a161d23 ML |
284 | pscdata->cfg = r; |
285 | pscdata->rate = params_rate(params); | |
286 | } | |
287 | ||
cdc65fbe | 288 | out: |
4a161d23 ML |
289 | return 0; |
290 | } | |
291 | ||
292 | static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream, | |
dee89c4d | 293 | int cmd, struct snd_soc_dai *dai) |
4a161d23 | 294 | { |
ffc4fdbb | 295 | struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai); |
25942fdc | 296 | int ret, stype = substream->stream; |
4a161d23 ML |
297 | |
298 | ret = 0; | |
299 | ||
300 | switch (cmd) { | |
301 | case SNDRV_PCM_TRIGGER_START: | |
302 | case SNDRV_PCM_TRIGGER_RESUME: | |
2f73bfbe ML |
303 | __raw_writel(AC97PCR_CLRFIFO(stype), AC97_PCR(pscdata)); |
304 | wmb(); /* drain writebuffer */ | |
305 | __raw_writel(AC97PCR_START(stype), AC97_PCR(pscdata)); | |
306 | wmb(); /* drain writebuffer */ | |
4a161d23 ML |
307 | break; |
308 | case SNDRV_PCM_TRIGGER_STOP: | |
309 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
2f73bfbe ML |
310 | __raw_writel(AC97PCR_STOP(stype), AC97_PCR(pscdata)); |
311 | wmb(); /* drain writebuffer */ | |
cdc65fbe | 312 | |
2f73bfbe | 313 | while (__raw_readl(AC97_STAT(pscdata)) & AC97STAT_BUSY(stype)) |
cdc65fbe ML |
314 | asm volatile ("nop"); |
315 | ||
2f73bfbe ML |
316 | __raw_writel(AC97PCR_CLRFIFO(stype), AC97_PCR(pscdata)); |
317 | wmb(); /* drain writebuffer */ | |
cdc65fbe | 318 | |
4a161d23 ML |
319 | break; |
320 | default: | |
321 | ret = -EINVAL; | |
322 | } | |
323 | return ret; | |
324 | } | |
325 | ||
5b0912be ML |
326 | static int au1xpsc_ac97_startup(struct snd_pcm_substream *substream, |
327 | struct snd_soc_dai *dai) | |
328 | { | |
329 | struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai); | |
330 | snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]); | |
331 | return 0; | |
332 | } | |
333 | ||
f0fba2ad | 334 | static int au1xpsc_ac97_probe(struct snd_soc_dai *dai) |
0f83d639 ML |
335 | { |
336 | return au1xpsc_ac97_workdata ? 0 : -ENODEV; | |
337 | } | |
338 | ||
85e7652d | 339 | static const struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = { |
5b0912be | 340 | .startup = au1xpsc_ac97_startup, |
0f83d639 ML |
341 | .trigger = au1xpsc_ac97_trigger, |
342 | .hw_params = au1xpsc_ac97_hw_params, | |
343 | }; | |
344 | ||
ffc4fdbb | 345 | static const struct snd_soc_dai_driver au1xpsc_ac97_dai_template = { |
bc263214 | 346 | .bus_control = true, |
0f83d639 | 347 | .probe = au1xpsc_ac97_probe, |
0f83d639 ML |
348 | .playback = { |
349 | .rates = AC97_RATES, | |
350 | .formats = AC97_FMTS, | |
351 | .channels_min = 2, | |
352 | .channels_max = 2, | |
353 | }, | |
354 | .capture = { | |
355 | .rates = AC97_RATES, | |
356 | .formats = AC97_FMTS, | |
357 | .channels_min = 2, | |
358 | .channels_max = 2, | |
359 | }, | |
360 | .ops = &au1xpsc_ac97_dai_ops, | |
361 | }; | |
0f83d639 | 362 | |
a4ff200c KM |
363 | static const struct snd_soc_component_driver au1xpsc_ac97_component = { |
364 | .name = "au1xpsc-ac97", | |
365 | }; | |
366 | ||
5c658be0 | 367 | static int au1xpsc_ac97_drvprobe(struct platform_device *pdev) |
4a161d23 ML |
368 | { |
369 | int ret; | |
226d0f22 | 370 | struct resource *iores, *dmares; |
4a161d23 | 371 | unsigned long sel; |
0f83d639 | 372 | struct au1xpsc_audio_data *wd; |
4a161d23 | 373 | |
8d9626d7 JL |
374 | wd = devm_kzalloc(&pdev->dev, sizeof(struct au1xpsc_audio_data), |
375 | GFP_KERNEL); | |
0f83d639 | 376 | if (!wd) |
4a161d23 ML |
377 | return -ENOMEM; |
378 | ||
0f83d639 | 379 | mutex_init(&wd->lock); |
cdc65fbe | 380 | |
226d0f22 | 381 | iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
a16a6c68 MB |
382 | wd->mmio = devm_ioremap_resource(&pdev->dev, iores); |
383 | if (IS_ERR(wd->mmio)) | |
384 | return PTR_ERR(wd->mmio); | |
4a161d23 | 385 | |
226d0f22 JL |
386 | dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
387 | if (!dmares) | |
8d9626d7 | 388 | return -EBUSY; |
226d0f22 | 389 | wd->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start; |
5b0912be | 390 | |
226d0f22 JL |
391 | dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
392 | if (!dmares) | |
8d9626d7 | 393 | return -EBUSY; |
226d0f22 | 394 | wd->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start; |
5b0912be | 395 | |
4a161d23 | 396 | /* configuration: max dma trigger threshold, enable ac97 */ |
0f83d639 ML |
397 | wd->cfg = PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8 | |
398 | PSC_AC97CFG_DE_ENABLE; | |
4a161d23 | 399 | |
0f83d639 | 400 | /* preserve PSC clock source set up by platform */ |
2f73bfbe ML |
401 | sel = __raw_readl(PSC_SEL(wd)) & PSC_SEL_CLK_MASK; |
402 | __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); | |
403 | wmb(); /* drain writebuffer */ | |
404 | __raw_writel(0, PSC_SEL(wd)); | |
405 | wmb(); /* drain writebuffer */ | |
406 | __raw_writel(PSC_SEL_PS_AC97MODE | sel, PSC_SEL(wd)); | |
407 | wmb(); /* drain writebuffer */ | |
4a161d23 | 408 | |
ffc4fdbb ML |
409 | /* name the DAI like this device instance ("au1xpsc-ac97.PSCINDEX") */ |
410 | memcpy(&wd->dai_drv, &au1xpsc_ac97_dai_template, | |
411 | sizeof(struct snd_soc_dai_driver)); | |
412 | wd->dai_drv.name = dev_name(&pdev->dev); | |
413 | ||
414 | platform_set_drvdata(pdev, wd); | |
415 | ||
b047e1cc MB |
416 | ret = snd_soc_set_ac97_ops(&psc_ac97_ops); |
417 | if (ret) | |
418 | return ret; | |
419 | ||
a4ff200c KM |
420 | ret = snd_soc_register_component(&pdev->dev, &au1xpsc_ac97_component, |
421 | &wd->dai_drv, 1); | |
0f83d639 | 422 | if (ret) |
8d9626d7 | 423 | return ret; |
0f83d639 | 424 | |
5b0912be ML |
425 | au1xpsc_ac97_workdata = wd; |
426 | return 0; | |
4a161d23 ML |
427 | } |
428 | ||
5c658be0 | 429 | static int au1xpsc_ac97_drvremove(struct platform_device *pdev) |
4a161d23 | 430 | { |
0f83d639 ML |
431 | struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev); |
432 | ||
a4ff200c | 433 | snd_soc_unregister_component(&pdev->dev); |
0f83d639 | 434 | |
4a161d23 | 435 | /* disable PSC completely */ |
2f73bfbe ML |
436 | __raw_writel(0, AC97_CFG(wd)); |
437 | wmb(); /* drain writebuffer */ | |
438 | __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); | |
439 | wmb(); /* drain writebuffer */ | |
4a161d23 | 440 | |
0f83d639 ML |
441 | au1xpsc_ac97_workdata = NULL; /* MDEV */ |
442 | ||
443 | return 0; | |
4a161d23 ML |
444 | } |
445 | ||
0f83d639 ML |
446 | #ifdef CONFIG_PM |
447 | static int au1xpsc_ac97_drvsuspend(struct device *dev) | |
4a161d23 | 448 | { |
0f83d639 ML |
449 | struct au1xpsc_audio_data *wd = dev_get_drvdata(dev); |
450 | ||
4a161d23 | 451 | /* save interesting registers and disable PSC */ |
2f73bfbe | 452 | wd->pm[0] = __raw_readl(PSC_SEL(wd)); |
4a161d23 | 453 | |
2f73bfbe ML |
454 | __raw_writel(0, AC97_CFG(wd)); |
455 | wmb(); /* drain writebuffer */ | |
456 | __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); | |
457 | wmb(); /* drain writebuffer */ | |
4a161d23 ML |
458 | |
459 | return 0; | |
460 | } | |
461 | ||
0f83d639 | 462 | static int au1xpsc_ac97_drvresume(struct device *dev) |
4a161d23 | 463 | { |
0f83d639 ML |
464 | struct au1xpsc_audio_data *wd = dev_get_drvdata(dev); |
465 | ||
4a161d23 | 466 | /* restore PSC clock config */ |
2f73bfbe ML |
467 | __raw_writel(wd->pm[0] | PSC_SEL_PS_AC97MODE, PSC_SEL(wd)); |
468 | wmb(); /* drain writebuffer */ | |
4a161d23 ML |
469 | |
470 | /* after this point the ac97 core will cold-reset the codec. | |
471 | * During cold-reset the PSC is reinitialized and the last | |
472 | * configuration set up in hw_params() is restored. | |
473 | */ | |
474 | return 0; | |
475 | } | |
476 | ||
0f83d639 ML |
477 | static struct dev_pm_ops au1xpscac97_pmops = { |
478 | .suspend = au1xpsc_ac97_drvsuspend, | |
479 | .resume = au1xpsc_ac97_drvresume, | |
6335d055 EM |
480 | }; |
481 | ||
0f83d639 ML |
482 | #define AU1XPSCAC97_PMOPS &au1xpscac97_pmops |
483 | ||
484 | #else | |
485 | ||
486 | #define AU1XPSCAC97_PMOPS NULL | |
487 | ||
488 | #endif | |
489 | ||
490 | static struct platform_driver au1xpsc_ac97_driver = { | |
491 | .driver = { | |
ffc4fdbb | 492 | .name = "au1xpsc_ac97", |
0f83d639 | 493 | .pm = AU1XPSCAC97_PMOPS, |
4a161d23 | 494 | }, |
0f83d639 | 495 | .probe = au1xpsc_ac97_drvprobe, |
5c658be0 | 496 | .remove = au1xpsc_ac97_drvremove, |
4a161d23 | 497 | }; |
4a161d23 | 498 | |
2105d63e | 499 | module_platform_driver(au1xpsc_ac97_driver); |
4a161d23 ML |
500 | |
501 | MODULE_LICENSE("GPL"); | |
502 | MODULE_DESCRIPTION("Au12x0/Au1550 PSC AC97 ALSA ASoC audio driver"); | |
0f83d639 ML |
503 | MODULE_AUTHOR("Manuel Lauss"); |
504 |