1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
4 *
5 * Author:	Nicolas Pitre
6 * Created:	Dec 02, 2004
7 * Copyright:	MontaVista Software Inc.
8 */
9
10#include <linux/init.h>
11#include <linux/io.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/dmaengine.h>
15#include <linux/dma/pxa-dma.h>
16
17#include <sound/ac97/controller.h>
18#include <sound/core.h>
19#include <sound/ac97_codec.h>
20#include <sound/soc.h>
21#include <sound/pxa2xx-lib.h>
22#include <sound/dmaengine_pcm.h>
23
24#include <linux/platform_data/asoc-pxa.h>
25
26#define PCDR	0x0040  /* PCM FIFO Data Register */
27#define MODR	0x0140  /* Modem FIFO Data Register */
28#define MCDR	0x0060  /* Mic-in FIFO Data Register */
29
30static void pxa2xx_ac97_warm_reset(struct ac97_controller *adrv)
31{
32	pxa2xx_ac97_try_warm_reset();
33
34	pxa2xx_ac97_finish_reset();
35}
36
37static void pxa2xx_ac97_cold_reset(struct ac97_controller *adrv)
38{
39	pxa2xx_ac97_try_cold_reset();
40
41	pxa2xx_ac97_finish_reset();
42}
43
44static int pxa2xx_ac97_read_actrl(struct ac97_controller *adrv, int slot,
45				  unsigned short reg)
46{
47	return pxa2xx_ac97_read(slot, reg);
48}
49
50static int pxa2xx_ac97_write_actrl(struct ac97_controller *adrv, int slot,
51				   unsigned short reg, unsigned short val)
52{
53	return pxa2xx_ac97_write(slot, reg, val);
54}
55
56static struct ac97_controller_ops pxa2xx_ac97_ops = {
57	.read	= pxa2xx_ac97_read_actrl,
58	.write	= pxa2xx_ac97_write_actrl,
59	.warm_reset	= pxa2xx_ac97_warm_reset,
60	.reset	= pxa2xx_ac97_cold_reset,
61};
62
63static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
64	.addr_width	= DMA_SLAVE_BUSWIDTH_4_BYTES,
65	.chan_name	= "pcm_pcm_stereo_in",
66	.maxburst	= 32,
67};
68
69static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
70	.addr_width	= DMA_SLAVE_BUSWIDTH_4_BYTES,
71	.chan_name	= "pcm_pcm_stereo_out",
72	.maxburst	= 32,
73};
74
75static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
76	.addr_width	= DMA_SLAVE_BUSWIDTH_2_BYTES,
77	.chan_name	= "pcm_aux_mono_out",
78	.maxburst	= 16,
79};
80
81static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
82	.addr_width	= DMA_SLAVE_BUSWIDTH_2_BYTES,
83	.chan_name	= "pcm_aux_mono_in",
84	.maxburst	= 16,
85};
86
87static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
88	.addr_width	= DMA_SLAVE_BUSWIDTH_2_BYTES,
89	.chan_name	= "pcm_aux_mic_mono",
90	.maxburst	= 16,
91};
92
93static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
94				    struct snd_soc_dai *cpu_dai)
95{
96	struct snd_dmaengine_dai_dma_data *dma_data;
97
98	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
99		dma_data = &pxa2xx_ac97_pcm_stereo_out;
100	else
101		dma_data = &pxa2xx_ac97_pcm_stereo_in;
102
103	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
104
105	return 0;
106}
107
108static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
109				   struct snd_soc_dai *cpu_dai)
110{
111	struct snd_dmaengine_dai_dma_data *dma_data;
112
113	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
114		dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
115	else
116		dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
117
118	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
119
120	return 0;
121}
122
123static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
124				   struct snd_soc_dai *cpu_dai)
125{
126	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
127		return -ENODEV;
128	snd_soc_dai_set_dma_data(cpu_dai, substream,
129				 &pxa2xx_ac97_pcm_mic_mono_in);
130
131	return 0;
132}
133
134#define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
135		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
136		SNDRV_PCM_RATE_48000)
137
138static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
139	.startup	= pxa2xx_ac97_hifi_startup,
140};
141
142static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
143	.startup	= pxa2xx_ac97_aux_startup,
144};
145
146static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
147	.startup	= pxa2xx_ac97_mic_startup,
148};
149
150/*
151 * There is only 1 physical AC97 interface for pxa2xx, but it
152 * has extra fifo's that can be used for aux DACs and ADCs.
153 */
154static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
155{
156	.name = "pxa2xx-ac97",
157	.playback = {
158		.stream_name = "AC97 Playback",
159		.channels_min = 2,
160		.channels_max = 2,
161		.rates = PXA2XX_AC97_RATES,
162		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
163	.capture = {
164		.stream_name = "AC97 Capture",
165		.channels_min = 2,
166		.channels_max = 2,
167		.rates = PXA2XX_AC97_RATES,
168		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
169	.ops = &pxa_ac97_hifi_dai_ops,
170},
171{
172	.name = "pxa2xx-ac97-aux",
173	.playback = {
174		.stream_name = "AC97 Aux Playback",
175		.channels_min = 1,
176		.channels_max = 1,
177		.rates = PXA2XX_AC97_RATES,
178		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
179	.capture = {
180		.stream_name = "AC97 Aux Capture",
181		.channels_min = 1,
182		.channels_max = 1,
183		.rates = PXA2XX_AC97_RATES,
184		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
185	.ops = &pxa_ac97_aux_dai_ops,
186},
187{
188	.name = "pxa2xx-ac97-mic",
189	.capture = {
190		.stream_name = "AC97 Mic Capture",
191		.channels_min = 1,
192		.channels_max = 1,
193		.rates = PXA2XX_AC97_RATES,
194		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
195	.ops = &pxa_ac97_mic_dai_ops,
196},
197};
198
199static const struct snd_soc_component_driver pxa_ac97_component = {
200	.name		= "pxa-ac97",
201	.pcm_construct	= pxa2xx_soc_pcm_new,
202	.open		= pxa2xx_soc_pcm_open,
203	.close		= pxa2xx_soc_pcm_close,
204	.hw_params	= pxa2xx_soc_pcm_hw_params,
205	.prepare	= pxa2xx_soc_pcm_prepare,
206	.trigger	= pxa2xx_soc_pcm_trigger,
207	.pointer	= pxa2xx_soc_pcm_pointer,
208};
209
210#ifdef CONFIG_OF
211static const struct of_device_id pxa2xx_ac97_dt_ids[] = {
212	{ .compatible = "marvell,pxa250-ac97", },
213	{ .compatible = "marvell,pxa270-ac97", },
214	{ .compatible = "marvell,pxa300-ac97", },
215	{ }
216};
217MODULE_DEVICE_TABLE(of, pxa2xx_ac97_dt_ids);
218
219#endif
220
221static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
222{
223	int ret;
224	struct ac97_controller *ctrl;
225	pxa2xx_audio_ops_t *pdata = pdev->dev.platform_data;
226	struct resource *regs;
227	void **codecs_pdata;
228
229	if (pdev->id != -1) {
230		dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
231		return -ENXIO;
232	}
233
234	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
235	if (!regs)
236		return -ENXIO;
237
238	pxa2xx_ac97_pcm_stereo_in.addr = regs->start + PCDR;
239	pxa2xx_ac97_pcm_stereo_out.addr = regs->start + PCDR;
240	pxa2xx_ac97_pcm_aux_mono_out.addr = regs->start + MODR;
241	pxa2xx_ac97_pcm_aux_mono_in.addr = regs->start + MODR;
242	pxa2xx_ac97_pcm_mic_mono_in.addr = regs->start + MCDR;
243
244	ret = pxa2xx_ac97_hw_probe(pdev);
245	if (ret) {
246		dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
247		return ret;
248	}
249
250	codecs_pdata = pdata ? pdata->codec_pdata : NULL;
251	ctrl = snd_ac97_controller_register(&pxa2xx_ac97_ops, &pdev->dev,
252					    AC97_SLOTS_AVAILABLE_ALL,
253					    codecs_pdata);
254	if (IS_ERR(ctrl))
255		return PTR_ERR(ctrl);
256
257	platform_set_drvdata(pdev, ctrl);
258	/* Punt most of the init to the SoC probe; we may need the machine
259	 * driver to do interesting things with the clocking to get us up
260	 * and running.
261	 */
262	return devm_snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
263					  pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
264}
265
266static void pxa2xx_ac97_dev_remove(struct platform_device *pdev)
267{
268	struct ac97_controller *ctrl = platform_get_drvdata(pdev);
269
270	snd_ac97_controller_unregister(ctrl);
271	pxa2xx_ac97_hw_remove(pdev);
272}
273
274static int pxa2xx_ac97_dev_suspend(struct device *dev)
275{
276	return pxa2xx_ac97_hw_suspend();
277}
278
279static int pxa2xx_ac97_dev_resume(struct device *dev)
280{
281	return pxa2xx_ac97_hw_resume();
282}
283
284static DEFINE_SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
285		pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
286
287static struct platform_driver pxa2xx_ac97_driver = {
288	.probe		= pxa2xx_ac97_dev_probe,
289	.remove_new	= pxa2xx_ac97_dev_remove,
290	.driver		= {
291		.name	= "pxa2xx-ac97",
292		.pm	= &pxa2xx_ac97_pm_ops,
293		.of_match_table = of_match_ptr(pxa2xx_ac97_dt_ids),
294	},
295};
296
297module_platform_driver(pxa2xx_ac97_driver);
298
299MODULE_AUTHOR("Nicolas Pitre");
300MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
301MODULE_LICENSE("GPL");
302MODULE_ALIAS("platform:pxa2xx-ac97");
303