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#ifdef CONFIG_PM_SLEEP
245		.pm	= &pxa2xx_ac97_pm_ops,
246#endif
247	},
248};
249
250module_platform_driver(pxa2xx_ac97_driver);
251
252MODULE_AUTHOR("Nicolas Pitre");
253MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
254MODULE_LICENSE("GPL");
255MODULE_ALIAS("platform:pxa2xx-ac97");
256