summaryrefslogtreecommitdiff
path: root/sound/soc/s3c24xx/s3c2443-ac97.c
blob: 723779a3058d3f998a41963e43e9b6b151062199 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
/*
 * s3c2443-ac97.c  --  ALSA Soc Audio Layer
 *
 * (c) 2007 Wolfson Microelectronics PLC.
 * Graeme Gregory graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
 *
 *  Copyright (C) 2005, Sean Choi <sh428.choi@samsung.com>
 *  All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/clk.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>

#include <mach/hardware.h>
#include <asm/plat-s3c/regs-ac97.h>
#include <mach/regs-gpio.h>
#include <mach/regs-clock.h>
#include <mach/audio.h>
#include <asm/dma.h>
#include <mach/dma.h>

#include "s3c24xx-pcm.h"
#include "s3c24xx-ac97.h"

struct s3c24xx_ac97_info {
	void __iomem	*regs;
	struct clk	*ac97_clk;
};
static struct s3c24xx_ac97_info s3c24xx_ac97;

static DECLARE_COMPLETION(ac97_completion);
static u32 codec_ready;
static DECLARE_MUTEX(ac97_mutex);

static unsigned short s3c2443_ac97_read(struct snd_ac97 *ac97,
	unsigned short reg)
{
	u32 ac_glbctrl;
	u32 ac_codec_cmd;
	u32 stat, addr, data;

	down(&ac97_mutex);

	codec_ready = S3C_AC97_GLBSTAT_CODECREADY;
	ac_codec_cmd = readl(s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
	ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg);
	writel(ac_codec_cmd, s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);

	udelay(50);

	ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);

	wait_for_completion(&ac97_completion);

	stat = readl(s3c24xx_ac97.regs + S3C_AC97_STAT);
	addr = (stat >> 16) & 0x7f;
	data = (stat & 0xffff);

	if (addr != reg)
		printk(KERN_ERR "s3c24xx-ac97: req addr = %02x,"
				" rep addr = %02x\n", reg, addr);

	up(&ac97_mutex);

	return (unsigned short)data;
}

static void s3c2443_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
	unsigned short val)
{
	u32 ac_glbctrl;
	u32 ac_codec_cmd;

	down(&ac97_mutex);

	codec_ready = S3C_AC97_GLBSTAT_CODECREADY;
	ac_codec_cmd = readl(s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
	ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val);
	writel(ac_codec_cmd, s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);

	udelay(50);

	ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);

	wait_for_completion(&ac97_completion);

	ac_codec_cmd = readl(s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
	ac_codec_cmd |= S3C_AC97_CODEC_CMD_READ;
	writel(ac_codec_cmd, s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);

	up(&ac97_mutex);

}

static void s3c2443_ac97_warm_reset(struct snd_ac97 *ac97)
{
	u32 ac_glbctrl;

	ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	ac_glbctrl = S3C_AC97_GLBCTRL_WARMRESET;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	msleep(1);

	ac_glbctrl = 0;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	msleep(1);
}

static void s3c2443_ac97_cold_reset(struct snd_ac97 *ac97)
{
	u32 ac_glbctrl;

	ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	ac_glbctrl = S3C_AC97_GLBCTRL_COLDRESET;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	msleep(1);

	ac_glbctrl = 0;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	msleep(1);

	ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	msleep(1);

	ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	msleep(1);

	ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA |
		S3C_AC97_GLBCTRL_PCMINTM_DMA | S3C_AC97_GLBCTRL_MICINTM_DMA;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
}

static irqreturn_t s3c2443_ac97_irq(int irq, void *dev_id)
{
	int status;
	u32 ac_glbctrl;

	status = readl(s3c24xx_ac97.regs + S3C_AC97_GLBSTAT) & codec_ready;

	if (status) {
		ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
		ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE;
		writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
		complete(&ac97_completion);
	}
	return IRQ_HANDLED;
}

struct snd_ac97_bus_ops soc_ac97_ops = {
	.read	= s3c2443_ac97_read,
	.write	= s3c2443_ac97_write,
	.warm_reset	= s3c2443_ac97_warm_reset,
	.reset	= s3c2443_ac97_cold_reset,
};

static struct s3c2410_dma_client s3c2443_dma_client_out = {
	.name = "AC97 PCM Stereo out"
};

static struct s3c2410_dma_client s3c2443_dma_client_in = {
	.name = "AC97 PCM Stereo in"
};

static struct s3c2410_dma_client s3c2443_dma_client_micin = {
	.name = "AC97 Mic Mono in"
};

static struct s3c24xx_pcm_dma_params s3c2443_ac97_pcm_stereo_out = {
	.client		= &s3c2443_dma_client_out,
	.channel	= DMACH_PCM_OUT,
	.dma_addr	= S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
	.dma_size	= 4,
};

static struct s3c24xx_pcm_dma_params s3c2443_ac97_pcm_stereo_in = {
	.client		= &s3c2443_dma_client_in,
	.channel	= DMACH_PCM_IN,
	.dma_addr	= S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
	.dma_size	= 4,
};

static struct s3c24xx_pcm_dma_params s3c2443_ac97_mic_mono_in = {
	.client		= &s3c2443_dma_client_micin,
	.channel	= DMACH_MIC_IN,
	.dma_addr	= S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
	.dma_size	= 4,
};

static int s3c2443_ac97_probe(struct platform_device *pdev,
			      struct snd_soc_dai *dai)
{
	int ret;
	u32 ac_glbctrl;

	s3c24xx_ac97.regs = ioremap(S3C2440_PA_AC97, 0x100);
	if (s3c24xx_ac97.regs == NULL)
		return -ENXIO;

	s3c24xx_ac97.ac97_clk = clk_get(&pdev->dev, "ac97");
	if (s3c24xx_ac97.ac97_clk == NULL) {
		printk(KERN_ERR "s3c2443-ac97 failed to get ac97_clock\n");
		iounmap(s3c24xx_ac97.regs);
		return -ENODEV;
	}
	clk_enable(s3c24xx_ac97.ac97_clk);

	s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2443_GPE0_AC_nRESET);
	s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2443_GPE1_AC_SYNC);
	s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2443_GPE2_AC_BITCLK);
	s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2443_GPE3_AC_SDI);
	s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2443_GPE4_AC_SDO);

	ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	ac_glbctrl = S3C_AC97_GLBCTRL_COLDRESET;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	msleep(1);

	ac_glbctrl = 0;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	msleep(1);

	ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	msleep(1);

	ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);

	ret = request_irq(IRQ_S3C244x_AC97, s3c2443_ac97_irq,
		IRQF_DISABLED, "AC97", NULL);
	if (ret < 0) {
		printk(KERN_ERR "s3c24xx-ac97: interrupt request failed.\n");
		clk_disable(s3c24xx_ac97.ac97_clk);
		clk_put(s3c24xx_ac97.ac97_clk);
		iounmap(s3c24xx_ac97.regs);
	}
	return ret;
}

static void s3c2443_ac97_remove(struct platform_device *pdev,
				struct snd_soc_dai *dai)
{
	free_irq(IRQ_S3C244x_AC97, NULL);
	clk_disable(s3c24xx_ac97.ac97_clk);
	clk_put(s3c24xx_ac97.ac97_clk);
	iounmap(s3c24xx_ac97.regs);
}

static int s3c2443_ac97_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *params,
				  struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		cpu_dai->dma_data = &s3c2443_ac97_pcm_stereo_out;
	else
		cpu_dai->dma_data = &s3c2443_ac97_pcm_stereo_in;

	return 0;
}

static int s3c2443_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
				struct snd_soc_dai *dai)
{
	u32 ac_glbctrl;

	ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
			ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA;
		else
			ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
			ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
		else
			ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK;
		break;
	}
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);

	return 0;
}

static int s3c2443_ac97_hw_mic_params(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params *params,
				      struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		return -ENODEV;
	else
		cpu_dai->dma_data = &s3c2443_ac97_mic_mono_in;

	return 0;
}

static int s3c2443_ac97_mic_trigger(struct snd_pcm_substream *substream,
				    int cmd, struct snd_soc_dai *dai)
{
	u32 ac_glbctrl;

	ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
	}
	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);

	return 0;
}

#define s3c2443_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)

struct snd_soc_dai s3c2443_ac97_dai[] = {
{
	.name = "s3c2443-ac97",
	.id = 0,
	.ac97_control = 1,
	.probe = s3c2443_ac97_probe,
	.remove = s3c2443_ac97_remove,
	.playback = {
		.stream_name = "AC97 Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = s3c2443_AC97_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.capture = {
		.stream_name = "AC97 Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = s3c2443_AC97_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.ops = {
		.hw_params = s3c2443_ac97_hw_params,
		.trigger = s3c2443_ac97_trigger},
},
{
	.name = "pxa2xx-ac97-mic",
	.id = 1,
	.ac97_control = 1,
	.capture = {
		.stream_name = "AC97 Mic Capture",
		.channels_min = 1,
		.channels_max = 1,
		.rates = s3c2443_AC97_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.ops = {
		.hw_params = s3c2443_ac97_hw_mic_params,
		.trigger = s3c2443_ac97_mic_trigger,},
},
};
EXPORT_SYMBOL_GPL(s3c2443_ac97_dai);
EXPORT_SYMBOL_GPL(soc_ac97_ops);

static int __init s3c2443_ac97_init(void)
{
	return snd_soc_register_dai(&s3c2443_ac97_dai);
}
module_init(s3c2443_ac97_init);

static void __exit s3c2443_ac97_exit(void)
{
	snd_soc_unregister_dai(&s3c2443_ac97_dai);
}
module_exit(s3c2443_ac97_exit);


MODULE_AUTHOR("Graeme Gregory");
MODULE_DESCRIPTION("AC97 driver for the Samsung s3c2443 chip");
MODULE_LICENSE("GPL");