1/*
  2 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
  3 *
  4 * Author:	Nicolas Pitre
  5 * Created:	Dec 02, 2004
  6 * Copyright:	MontaVista Software Inc.
  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/init.h>
 14#include <linux/io.h>
 15#include <linux/module.h>
 16#include <linux/platform_device.h>
 17#include <linux/dmaengine.h>
 18
 19#include <sound/core.h>
 20#include <sound/pcm.h>
 21#include <sound/ac97_codec.h>
 22#include <sound/initval.h>
 23#include <sound/pxa2xx-lib.h>
 24#include <sound/dmaengine_pcm.h>
 25
 26#include <mach/regs-ac97.h>
 27#include <mach/audio.h>
 28
 29#include "pxa2xx-pcm.h"
 30
 31static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
 32{
 33	if (!pxa2xx_ac97_try_cold_reset(ac97)) {
 34		pxa2xx_ac97_try_warm_reset(ac97);
 35	}
 36
 37	pxa2xx_ac97_finish_reset(ac97);
 38}
 39
 40static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
 41	.read	= pxa2xx_ac97_read,
 42	.write	= pxa2xx_ac97_write,
 43	.reset	= pxa2xx_ac97_reset,
 44};
 45
 46static unsigned long pxa2xx_ac97_pcm_out_req = 12;
 47static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
 48	.addr		= __PREG(PCDR),
 49	.addr_width	= DMA_SLAVE_BUSWIDTH_4_BYTES,
 50	.maxburst	= 32,
 51	.filter_data	= &pxa2xx_ac97_pcm_out_req,
 52};
 53
 54static unsigned long pxa2xx_ac97_pcm_in_req = 11;
 55static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
 56	.addr		= __PREG(PCDR),
 57	.addr_width	= DMA_SLAVE_BUSWIDTH_4_BYTES,
 58	.maxburst	= 32,
 59	.filter_data	= &pxa2xx_ac97_pcm_in_req,
 60};
 61
 62static struct snd_pcm *pxa2xx_ac97_pcm;
 63static struct snd_ac97 *pxa2xx_ac97_ac97;
 64
 65static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
 66{
 67	struct snd_pcm_runtime *runtime = substream->runtime;
 68	pxa2xx_audio_ops_t *platform_ops;
 69	int r;
 70
 71	runtime->hw.channels_min = 2;
 72	runtime->hw.channels_max = 2;
 73
 74	r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 75	    AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
 76	runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
 77	snd_pcm_limit_hw_rates(runtime);
 78
 79       	platform_ops = substream->pcm->card->dev->platform_data;
 80	if (platform_ops && platform_ops->startup)
 81		return platform_ops->startup(substream, platform_ops->priv);
 82	else
 83		return 0;
 84}
 85
 86static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
 87{
 88	pxa2xx_audio_ops_t *platform_ops;
 89
 90       	platform_ops = substream->pcm->card->dev->platform_data;
 91	if (platform_ops && platform_ops->shutdown)
 92		platform_ops->shutdown(substream, platform_ops->priv);
 93}
 94
 95static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
 96{
 97	struct snd_pcm_runtime *runtime = substream->runtime;
 98	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 99		  AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
100	return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
101}
102
103static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
104	.playback_params	= &pxa2xx_ac97_pcm_out,
105	.capture_params		= &pxa2xx_ac97_pcm_in,
106	.startup		= pxa2xx_ac97_pcm_startup,
107	.shutdown		= pxa2xx_ac97_pcm_shutdown,
108	.prepare		= pxa2xx_ac97_pcm_prepare,
109};
110
111#ifdef CONFIG_PM_SLEEP
112
113static int pxa2xx_ac97_do_suspend(struct snd_card *card)
114{
115	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
116
117	snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
118	snd_pcm_suspend_all(pxa2xx_ac97_pcm);
119	snd_ac97_suspend(pxa2xx_ac97_ac97);
120	if (platform_ops && platform_ops->suspend)
121		platform_ops->suspend(platform_ops->priv);
122
123	return pxa2xx_ac97_hw_suspend();
124}
125
126static int pxa2xx_ac97_do_resume(struct snd_card *card)
127{
128	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
129	int rc;
130
131	rc = pxa2xx_ac97_hw_resume();
132	if (rc)
133		return rc;
134
135	if (platform_ops && platform_ops->resume)
136		platform_ops->resume(platform_ops->priv);
137	snd_ac97_resume(pxa2xx_ac97_ac97);
138	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
139
140	return 0;
141}
142
143static int pxa2xx_ac97_suspend(struct device *dev)
144{
145	struct snd_card *card = dev_get_drvdata(dev);
146	int ret = 0;
147
148	if (card)
149		ret = pxa2xx_ac97_do_suspend(card);
150
151	return ret;
152}
153
154static int pxa2xx_ac97_resume(struct device *dev)
155{
156	struct snd_card *card = dev_get_drvdata(dev);
157	int ret = 0;
158
159	if (card)
160		ret = pxa2xx_ac97_do_resume(card);
161
162	return ret;
163}
164
165static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
 
 
 
166#endif
167
168static int pxa2xx_ac97_probe(struct platform_device *dev)
169{
170	struct snd_card *card;
171	struct snd_ac97_bus *ac97_bus;
172	struct snd_ac97_template ac97_template;
173	int ret;
174	pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
175
176	if (dev->id >= 0) {
177		dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
178		ret = -ENXIO;
179		goto err_dev;
180	}
181
182	ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
183			   THIS_MODULE, 0, &card);
184	if (ret < 0)
185		goto err;
186
187	strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
 
188
189	ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
190	if (ret)
191		goto err;
192
193	ret = pxa2xx_ac97_hw_probe(dev);
194	if (ret)
195		goto err;
196
197	ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
198	if (ret)
199		goto err_remove;
200	memset(&ac97_template, 0, sizeof(ac97_template));
201	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
202	if (ret)
203		goto err_remove;
204
205	snprintf(card->shortname, sizeof(card->shortname),
206		 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
207	snprintf(card->longname, sizeof(card->longname),
208		 "%s (%s)", dev->dev.driver->name, card->mixername);
209
210	if (pdata && pdata->codec_pdata[0])
211		snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
 
212	ret = snd_card_register(card);
213	if (ret == 0) {
214		platform_set_drvdata(dev, card);
215		return 0;
216	}
217
218err_remove:
219	pxa2xx_ac97_hw_remove(dev);
220err:
221	if (card)
222		snd_card_free(card);
223err_dev:
224	return ret;
225}
226
227static int pxa2xx_ac97_remove(struct platform_device *dev)
228{
229	struct snd_card *card = platform_get_drvdata(dev);
230
231	if (card) {
232		snd_card_free(card);
 
233		pxa2xx_ac97_hw_remove(dev);
234	}
235
236	return 0;
237}
238
239static struct platform_driver pxa2xx_ac97_driver = {
240	.probe		= pxa2xx_ac97_probe,
241	.remove		= pxa2xx_ac97_remove,
242	.driver		= {
243		.name	= "pxa2xx-ac97",
244		.owner	= THIS_MODULE,
245#ifdef CONFIG_PM_SLEEP
246		.pm	= &pxa2xx_ac97_pm_ops,
247#endif
248	},
249};
250
251module_platform_driver(pxa2xx_ac97_driver);
252
253MODULE_AUTHOR("Nicolas Pitre");
254MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
255MODULE_LICENSE("GPL");
256MODULE_ALIAS("platform:pxa2xx-ac97");

  1/*
  2 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
  3 *
  4 * Author:	Nicolas Pitre
  5 * Created:	Dec 02, 2004
  6 * Copyright:	MontaVista Software Inc.
  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/init.h>
 14#include <linux/io.h>
 15#include <linux/module.h>
 16#include <linux/platform_device.h>
 
 17
 18#include <sound/core.h>
 19#include <sound/pcm.h>
 20#include <sound/ac97_codec.h>
 21#include <sound/initval.h>
 22#include <sound/pxa2xx-lib.h>
 
 23
 24#include <mach/regs-ac97.h>
 25#include <mach/audio.h>
 26
 27#include "pxa2xx-pcm.h"
 28
 29static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
 30{
 31	if (!pxa2xx_ac97_try_cold_reset(ac97)) {
 32		pxa2xx_ac97_try_warm_reset(ac97);
 33	}
 34
 35	pxa2xx_ac97_finish_reset(ac97);
 36}
 37
 38static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
 39	.read	= pxa2xx_ac97_read,
 40	.write	= pxa2xx_ac97_write,
 41	.reset	= pxa2xx_ac97_reset,
 42};
 43
 44static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_out = {
 45	.name			= "AC97 PCM out",
 46	.dev_addr		= __PREG(PCDR),
 47	.drcmr			= &DRCMR(12),
 48	.dcmd			= DCMD_INCSRCADDR | DCMD_FLOWTRG |
 49				  DCMD_BURST32 | DCMD_WIDTH4,
 50};
 51
 52static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_in = {
 53	.name			= "AC97 PCM in",
 54	.dev_addr		= __PREG(PCDR),
 55	.drcmr			= &DRCMR(11),
 56	.dcmd			= DCMD_INCTRGADDR | DCMD_FLOWSRC |
 57				  DCMD_BURST32 | DCMD_WIDTH4,
 58};
 59
 60static struct snd_pcm *pxa2xx_ac97_pcm;
 61static struct snd_ac97 *pxa2xx_ac97_ac97;
 62
 63static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
 64{
 65	struct snd_pcm_runtime *runtime = substream->runtime;
 66	pxa2xx_audio_ops_t *platform_ops;
 67	int r;
 68
 69	runtime->hw.channels_min = 2;
 70	runtime->hw.channels_max = 2;
 71
 72	r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 73	    AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
 74	runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
 75	snd_pcm_limit_hw_rates(runtime);
 76
 77       	platform_ops = substream->pcm->card->dev->platform_data;
 78	if (platform_ops && platform_ops->startup)
 79		return platform_ops->startup(substream, platform_ops->priv);
 80	else
 81		return 0;
 82}
 83
 84static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
 85{
 86	pxa2xx_audio_ops_t *platform_ops;
 87
 88       	platform_ops = substream->pcm->card->dev->platform_data;
 89	if (platform_ops && platform_ops->shutdown)
 90		platform_ops->shutdown(substream, platform_ops->priv);
 91}
 92
 93static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
 94{
 95	struct snd_pcm_runtime *runtime = substream->runtime;
 96	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 97		  AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
 98	return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
 99}
100
101static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
102	.playback_params	= &pxa2xx_ac97_pcm_out,
103	.capture_params		= &pxa2xx_ac97_pcm_in,
104	.startup		= pxa2xx_ac97_pcm_startup,
105	.shutdown		= pxa2xx_ac97_pcm_shutdown,
106	.prepare		= pxa2xx_ac97_pcm_prepare,
107};
108
109#ifdef CONFIG_PM
110
111static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state)
112{
113	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
114
115	snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
116	snd_pcm_suspend_all(pxa2xx_ac97_pcm);
117	snd_ac97_suspend(pxa2xx_ac97_ac97);
118	if (platform_ops && platform_ops->suspend)
119		platform_ops->suspend(platform_ops->priv);
120
121	return pxa2xx_ac97_hw_suspend();
122}
123
124static int pxa2xx_ac97_do_resume(struct snd_card *card)
125{
126	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
127	int rc;
128
129	rc = pxa2xx_ac97_hw_resume();
130	if (rc)
131		return rc;
132
133	if (platform_ops && platform_ops->resume)
134		platform_ops->resume(platform_ops->priv);
135	snd_ac97_resume(pxa2xx_ac97_ac97);
136	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
137
138	return 0;
139}
140
141static int pxa2xx_ac97_suspend(struct device *dev)
142{
143	struct snd_card *card = dev_get_drvdata(dev);
144	int ret = 0;
145
146	if (card)
147		ret = pxa2xx_ac97_do_suspend(card, PMSG_SUSPEND);
148
149	return ret;
150}
151
152static int pxa2xx_ac97_resume(struct device *dev)
153{
154	struct snd_card *card = dev_get_drvdata(dev);
155	int ret = 0;
156
157	if (card)
158		ret = pxa2xx_ac97_do_resume(card);
159
160	return ret;
161}
162
163static const struct dev_pm_ops pxa2xx_ac97_pm_ops = {
164	.suspend	= pxa2xx_ac97_suspend,
165	.resume		= pxa2xx_ac97_resume,
166};
167#endif
168
169static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
170{
171	struct snd_card *card;
172	struct snd_ac97_bus *ac97_bus;
173	struct snd_ac97_template ac97_template;
174	int ret;
175	pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
176
177	if (dev->id >= 0) {
178		dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
179		ret = -ENXIO;
180		goto err_dev;
181	}
182
183	ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
184			      THIS_MODULE, 0, &card);
185	if (ret < 0)
186		goto err;
187
188	card->dev = &dev->dev;
189	strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
190
191	ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
192	if (ret)
193		goto err;
194
195	ret = pxa2xx_ac97_hw_probe(dev);
196	if (ret)
197		goto err;
198
199	ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
200	if (ret)
201		goto err_remove;
202	memset(&ac97_template, 0, sizeof(ac97_template));
203	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
204	if (ret)
205		goto err_remove;
206
207	snprintf(card->shortname, sizeof(card->shortname),
208		 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
209	snprintf(card->longname, sizeof(card->longname),
210		 "%s (%s)", dev->dev.driver->name, card->mixername);
211
212	if (pdata && pdata->codec_pdata[0])
213		snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
214	snd_card_set_dev(card, &dev->dev);
215	ret = snd_card_register(card);
216	if (ret == 0) {
217		platform_set_drvdata(dev, card);
218		return 0;
219	}
220
221err_remove:
222	pxa2xx_ac97_hw_remove(dev);
223err:
224	if (card)
225		snd_card_free(card);
226err_dev:
227	return ret;
228}
229
230static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
231{
232	struct snd_card *card = platform_get_drvdata(dev);
233
234	if (card) {
235		snd_card_free(card);
236		platform_set_drvdata(dev, NULL);
237		pxa2xx_ac97_hw_remove(dev);
238	}
239
240	return 0;
241}
242
243static struct platform_driver pxa2xx_ac97_driver = {
244	.probe		= pxa2xx_ac97_probe,
245	.remove		= __devexit_p(pxa2xx_ac97_remove),
246	.driver		= {
247		.name	= "pxa2xx-ac97",
248		.owner	= THIS_MODULE,
249#ifdef CONFIG_PM
250		.pm	= &pxa2xx_ac97_pm_ops,
251#endif
252	},
253};
254
255module_platform_driver(pxa2xx_ac97_driver);
256
257MODULE_AUTHOR("Nicolas Pitre");
258MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
259MODULE_LICENSE("GPL");
260MODULE_ALIAS("platform:pxa2xx-ac97");