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/module.h>
15#include <linux/platform_device.h>
16
17#include <sound/core.h>
18#include <sound/pcm.h>
19#include <sound/ac97_codec.h>
20#include <sound/initval.h>
21#include <sound/pxa2xx-lib.h>
22
23#include <mach/regs-ac97.h>
24#include <mach/audio.h>
25
26#include "pxa2xx-pcm.h"
27
28static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
29{
30	if (!pxa2xx_ac97_try_cold_reset(ac97)) {
31		pxa2xx_ac97_try_warm_reset(ac97);
32	}
33
34	pxa2xx_ac97_finish_reset(ac97);
35}
36
37static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
38	.read	= pxa2xx_ac97_read,
39	.write	= pxa2xx_ac97_write,
40	.reset	= pxa2xx_ac97_reset,
41};
42
43static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_out = {
44	.name			= "AC97 PCM out",
45	.dev_addr		= __PREG(PCDR),
46	.drcmr			= &DRCMR(12),
47	.dcmd			= DCMD_INCSRCADDR | DCMD_FLOWTRG |
48				  DCMD_BURST32 | DCMD_WIDTH4,
49};
50
51static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_in = {
52	.name			= "AC97 PCM in",
53	.dev_addr		= __PREG(PCDR),
54	.drcmr			= &DRCMR(11),
55	.dcmd			= DCMD_INCTRGADDR | DCMD_FLOWSRC |
56				  DCMD_BURST32 | DCMD_WIDTH4,
57};
58
59static struct snd_pcm *pxa2xx_ac97_pcm;
60static struct snd_ac97 *pxa2xx_ac97_ac97;
61
62static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
63{
64	struct snd_pcm_runtime *runtime = substream->runtime;
65	pxa2xx_audio_ops_t *platform_ops;
66	int r;
67
68	runtime->hw.channels_min = 2;
69	runtime->hw.channels_max = 2;
70
71	r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
72	    AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
73	runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
74	snd_pcm_limit_hw_rates(runtime);
75
76       	platform_ops = substream->pcm->card->dev->platform_data;
77	if (platform_ops && platform_ops->startup)
78		return platform_ops->startup(substream, platform_ops->priv);
79	else
80		return 0;
81}
82
83static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
84{
85	pxa2xx_audio_ops_t *platform_ops;
86
87       	platform_ops = substream->pcm->card->dev->platform_data;
88	if (platform_ops && platform_ops->shutdown)
89		platform_ops->shutdown(substream, platform_ops->priv);
90}
91
92static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
93{
94	struct snd_pcm_runtime *runtime = substream->runtime;
95	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
96		  AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
97	return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
98}
99
100static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
101	.playback_params	= &pxa2xx_ac97_pcm_out,
102	.capture_params		= &pxa2xx_ac97_pcm_in,
103	.startup		= pxa2xx_ac97_pcm_startup,
104	.shutdown		= pxa2xx_ac97_pcm_shutdown,
105	.prepare		= pxa2xx_ac97_pcm_prepare,
106};
107
108#ifdef CONFIG_PM
109
110static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state)
111{
112	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
113
114	snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
115	snd_pcm_suspend_all(pxa2xx_ac97_pcm);
116	snd_ac97_suspend(pxa2xx_ac97_ac97);
117	if (platform_ops && platform_ops->suspend)
118		platform_ops->suspend(platform_ops->priv);
119
120	return pxa2xx_ac97_hw_suspend();
121}
122
123static int pxa2xx_ac97_do_resume(struct snd_card *card)
124{
125	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
126	int rc;
127
128	rc = pxa2xx_ac97_hw_resume();
129	if (rc)
130		return rc;
131
132	if (platform_ops && platform_ops->resume)
133		platform_ops->resume(platform_ops->priv);
134	snd_ac97_resume(pxa2xx_ac97_ac97);
135	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
136
137	return 0;
138}
139
140static int pxa2xx_ac97_suspend(struct device *dev)
141{
142	struct snd_card *card = dev_get_drvdata(dev);
143	int ret = 0;
144
145	if (card)
146		ret = pxa2xx_ac97_do_suspend(card, PMSG_SUSPEND);
147
148	return ret;
149}
150
151static int pxa2xx_ac97_resume(struct device *dev)
152{
153	struct snd_card *card = dev_get_drvdata(dev);
154	int ret = 0;
155
156	if (card)
157		ret = pxa2xx_ac97_do_resume(card);
158
159	return ret;
160}
161
162static const struct dev_pm_ops pxa2xx_ac97_pm_ops = {
163	.suspend	= pxa2xx_ac97_suspend,
164	.resume		= pxa2xx_ac97_resume,
165};
166#endif
167
168static int __devinit 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_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
183			      THIS_MODULE, 0, &card);
184	if (ret < 0)
185		goto err;
186
187	card->dev = &dev->dev;
188	strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
189
190	ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
191	if (ret)
192		goto err;
193
194	ret = pxa2xx_ac97_hw_probe(dev);
195	if (ret)
196		goto err;
197
198	ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
199	if (ret)
200		goto err_remove;
201	memset(&ac97_template, 0, sizeof(ac97_template));
202	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
203	if (ret)
204		goto err_remove;
205
206	snprintf(card->shortname, sizeof(card->shortname),
207		 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
208	snprintf(card->longname, sizeof(card->longname),
209		 "%s (%s)", dev->dev.driver->name, card->mixername);
210
211	if (pdata && pdata->codec_pdata[0])
212		snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
213	snd_card_set_dev(card, &dev->dev);
214	ret = snd_card_register(card);
215	if (ret == 0) {
216		platform_set_drvdata(dev, card);
217		return 0;
218	}
219
220err_remove:
221	pxa2xx_ac97_hw_remove(dev);
222err:
223	if (card)
224		snd_card_free(card);
225err_dev:
226	return ret;
227}
228
229static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
230{
231	struct snd_card *card = platform_get_drvdata(dev);
232
233	if (card) {
234		snd_card_free(card);
235		platform_set_drvdata(dev, NULL);
236		pxa2xx_ac97_hw_remove(dev);
237	}
238
239	return 0;
240}
241
242static struct platform_driver pxa2xx_ac97_driver = {
243	.probe		= pxa2xx_ac97_probe,
244	.remove		= __devexit_p(pxa2xx_ac97_remove),
245	.driver		= {
246		.name	= "pxa2xx-ac97",
247		.owner	= THIS_MODULE,
248#ifdef CONFIG_PM
249		.pm	= &pxa2xx_ac97_pm_ops,
250#endif
251	},
252};
253
254static int __init pxa2xx_ac97_init(void)
255{
256	return platform_driver_register(&pxa2xx_ac97_driver);
257}
258
259static void __exit pxa2xx_ac97_exit(void)
260{
261	platform_driver_unregister(&pxa2xx_ac97_driver);
262}
263
264module_init(pxa2xx_ac97_init);
265module_exit(pxa2xx_ac97_exit);
266
267MODULE_AUTHOR("Nicolas Pitre");
268MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
269MODULE_LICENSE("GPL");
270MODULE_ALIAS("platform:pxa2xx-ac97");
271