summaryrefslogtreecommitdiffstats
path: root/sound/soc/at91/eti_b1_wm8731.c
blob: 089cdc9e726556ab09c68cd04aaaaa2beeb5f4ea (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
/*
 * eti_b1_wm8731  --  SoC audio for AT91RM9200-based Endrelia ETI_B1 board.
 *
 * Author:	Frank Mandarino <fmandarino@endrelia.com>
 *		Endrelia Technologies Inc.
 * Created:	Mar 29, 2006
 *
 * Based on corgi.c by:
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
 * Copyright 2005 Openedhand Ltd.
 *
 * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
 *          Richard Purdie <richard@openedhand.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  Revision history
 *    30th Nov 2005   Initial version.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include <asm/arch/hardware.h>
#include <asm/arch/at91_pio.h>
#include <asm/arch/gpio.h>

#include "../codecs/wm8731.h"
#include "at91-pcm.h"

#if 0
#define	DBG(x...)	printk(KERN_INFO "eti_b1_wm8731:" x)
#else
#define	DBG(x...)
#endif

#define AT91_PIO_TF1	(1 << (AT91_PIN_PB6 - PIN_BASE) % 32)
#define AT91_PIO_TK1	(1 << (AT91_PIN_PB7 - PIN_BASE) % 32)
#define AT91_PIO_TD1	(1 << (AT91_PIN_PB8 - PIN_BASE) % 32)
#define AT91_PIO_RD1	(1 << (AT91_PIN_PB9 - PIN_BASE) % 32)
#define AT91_PIO_RK1	(1 << (AT91_PIN_PB10 - PIN_BASE) % 32)
#define AT91_PIO_RF1	(1 << (AT91_PIN_PB11 - PIN_BASE) % 32)


static struct clk *pck1_clk;
static struct clk *pllb_clk;

static int eti_b1_startup(struct snd_pcm_substream *substream)
{
	/* Start PCK1 clock. */
	clk_enable(pck1_clk);
	DBG("pck1 started\n");

	return 0;
}

static void eti_b1_shutdown(struct snd_pcm_substream *substream)
{
	/* Stop PCK1 clock. */
	clk_disable(pck1_clk);
	DBG("pck1 stopped\n");
}

static struct snd_soc_ops eti_b1_ops = {
	.startup = eti_b1_startup,
	.shutdown = eti_b1_shutdown,
};


static const struct snd_soc_dapm_widget eti_b1_dapm_widgets[] = {
	SND_SOC_DAPM_MIC("Int Mic", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
};

static const char *intercon[][3] = {

	/* speaker connected to LHPOUT */
	{"Ext Spk", NULL, "LHPOUT"},

	/* mic is connected to Mic Jack, with WM8731 Mic Bias */
	{"MICIN", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Int Mic"},

	/* terminator */
	{NULL, NULL, NULL},
};

/*
 * Logic for a wm8731 as connected on a Endrelia ETI-B1 board.
 */
static int eti_b1_wm8731_init(struct snd_soc_codec *codec)
{
	int i;

	DBG("eti_b1_wm8731_init() called\n");

	/* Add specific widgets */
	for(i = 0; i < ARRAY_SIZE(eti_b1_dapm_widgets); i++) {
		snd_soc_dapm_new_control(codec, &eti_b1_dapm_widgets[i]);
	}

	/* Set up specific audio path interconnects */
	for(i = 0; intercon[i][0] != NULL; i++) {
		snd_soc_dapm_connect_input(codec, intercon[i][0],
			intercon[i][1], intercon[i][2]);
	}

	/* not connected */
	snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0);
	snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0);

	/* always connected */
	snd_soc_dapm_set_endpoint(codec, "Int Mic", 1);
	snd_soc_dapm_set_endpoint(codec, "Ext Spk", 1);

	snd_soc_dapm_sync_endpoints(codec);

	return 0;
}

unsigned int eti_b1_config_sysclk(struct snd_soc_pcm_runtime *rtd,
	struct snd_soc_clock_info *info)
{
	if(info->bclk_master & SND_SOC_DAIFMT_CBS_CFS) {
		return rtd->codec_dai->config_sysclk(rtd->codec_dai, info, 12000000);
	}
	return 0;
}

static struct snd_soc_dai_link eti_b1_dai = {
	.name = "WM8731",
	.stream_name = "WM8731",
	.cpu_dai = &at91_i2s_dai[1],
	.codec_dai = &wm8731_dai,
	.init = eti_b1_wm8731_init,
	.config_sysclk = eti_b1_config_sysclk,
};

static struct snd_soc_machine snd_soc_machine_eti_b1 = {
	.name = "ETI_B1",
	.dai_link = &eti_b1_dai,
	.num_links = 1,
	.ops = &eti_b1_ops,
};

static struct wm8731_setup_data eti_b1_wm8731_setup = {
	.i2c_address = 0x1a,
};

static struct snd_soc_device eti_b1_snd_devdata = {
	.machine = &snd_soc_machine_eti_b1,
	.platform = &at91_soc_platform,
	.codec_dev = &soc_codec_dev_wm8731,
	.codec_data = &eti_b1_wm8731_setup,
};

static struct platform_device *eti_b1_snd_device;

static int __init eti_b1_init(void)
{
	int ret;
	u32 ssc_pio_lines;
	struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;

	if (!request_mem_region(AT91RM9200_BASE_SSC1, SZ_16K, "soc-audio")) {
		DBG("SSC1 memory region is busy\n");
		return -EBUSY;
	}

	ssc->base = ioremap(AT91RM9200_BASE_SSC1, SZ_16K);
	if (!ssc->base) {
		DBG("SSC1 memory ioremap failed\n");
		ret = -ENOMEM;
		goto fail_release_mem;
	}

	ssc->pid = AT91RM9200_ID_SSC1;

	eti_b1_snd_device = platform_device_alloc("soc-audio", -1);
	if (!eti_b1_snd_device) {
		DBG("platform device allocation failed\n");
		ret = -ENOMEM;
		goto fail_io_unmap;
	}

	platform_set_drvdata(eti_b1_snd_device, &eti_b1_snd_devdata);
	eti_b1_snd_devdata.dev = &eti_b1_snd_device->dev;

	ret = platform_device_add(eti_b1_snd_device);
	if (ret) {
		DBG("platform device add failed\n");
		platform_device_put(eti_b1_snd_device);
		goto fail_io_unmap;
	}

 	ssc_pio_lines = AT91_PIO_TF1 | AT91_PIO_TK1 | AT91_PIO_TD1
			| AT91_PIO_RD1 /* | AT91_PIO_RK1 | AT91_PIO_RF1 */;

	/* Reset all PIO registers and assign lines to peripheral A */
 	at91_sys_write(AT91_PIOB + PIO_PDR,  ssc_pio_lines);
 	at91_sys_write(AT91_PIOB + PIO_ODR,  ssc_pio_lines);
 	at91_sys_write(AT91_PIOB + PIO_IFDR, ssc_pio_lines);
 	at91_sys_write(AT91_PIOB + PIO_CODR, ssc_pio_lines);
 	at91_sys_write(AT91_PIOB + PIO_IDR,  ssc_pio_lines);
 	at91_sys_write(AT91_PIOB + PIO_MDDR, ssc_pio_lines);
 	at91_sys_write(AT91_PIOB + PIO_PUDR, ssc_pio_lines);
 	at91_sys_write(AT91_PIOB + PIO_ASR,  ssc_pio_lines);
 	at91_sys_write(AT91_PIOB + PIO_OWDR, ssc_pio_lines);

	/*
	 * Set PCK1 parent to PLLB and its rate to 12 Mhz.
	 */
	pllb_clk = clk_get(NULL, "pllb");
	pck1_clk = clk_get(NULL, "pck1");

	clk_set_parent(pck1_clk, pllb_clk);
	clk_set_rate(pck1_clk, 12000000);

	DBG("MCLK rate %luHz\n", clk_get_rate(pck1_clk));

	/* assign the GPIO pin to PCK1 */
	at91_set_B_periph(AT91_PIN_PA24, 0);

	return ret;

fail_io_unmap:
	iounmap(ssc->base);
fail_release_mem:
	release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
	return ret;
}

static void __exit eti_b1_exit(void)
{
	struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;

	clk_put(pck1_clk);
	clk_put(pllb_clk);

	platform_device_unregister(eti_b1_snd_device);

	iounmap(ssc->base);
	release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
}

module_init(eti_b1_init);
module_exit(eti_b1_exit);

/* Module information */
MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
MODULE_DESCRIPTION("ALSA SoC ETI-B1-WM8731");
MODULE_LICENSE("GPL");