1/*
2 * File:         sound/soc/blackfin/bf5xx-ad73311.c
3 * Author:       Cliff Cai <Cliff.Cai@analog.com>
4 *
5 * Created:      Thur Sep 25 2008
6 * Description:  Board driver for ad73311 sound chip
7 *
8 * Modified:
9 *               Copyright 2008 Analog Devices Inc.
10 *
11 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see the file COPYING, or write
25 * to the Free Software Foundation, Inc.,
26 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
27 */
28
29#include <linux/module.h>
30#include <linux/moduleparam.h>
31#include <linux/device.h>
32#include <linux/delay.h>
33#include <linux/gpio.h>
34
35#include <sound/core.h>
36#include <sound/pcm.h>
37#include <sound/soc.h>
38#include <sound/pcm_params.h>
39
40#include <asm/blackfin.h>
41#include <asm/cacheflush.h>
42#include <asm/irq.h>
43#include <asm/dma.h>
44#include <asm/portmux.h>
45
46#include "../codecs/ad73311.h"
47#include "bf5xx-sport.h"
48#include "bf5xx-i2s-pcm.h"
49
50#if CONFIG_SND_BF5XX_SPORT_NUM == 0
51#define bfin_write_SPORT_TCR1	bfin_write_SPORT0_TCR1
52#define bfin_read_SPORT_TCR1	bfin_read_SPORT0_TCR1
53#define bfin_write_SPORT_TCR2	bfin_write_SPORT0_TCR2
54#define bfin_write_SPORT_TX16	bfin_write_SPORT0_TX16
55#define bfin_read_SPORT_STAT	bfin_read_SPORT0_STAT
56#else
57#define bfin_write_SPORT_TCR1	bfin_write_SPORT1_TCR1
58#define bfin_read_SPORT_TCR1	bfin_read_SPORT1_TCR1
59#define bfin_write_SPORT_TCR2	bfin_write_SPORT1_TCR2
60#define bfin_write_SPORT_TX16	bfin_write_SPORT1_TX16
61#define bfin_read_SPORT_STAT	bfin_read_SPORT1_STAT
62#endif
63
64#define GPIO_SE CONFIG_SND_BFIN_AD73311_SE
65
66static struct snd_soc_card bf5xx_ad73311;
67
68static int snd_ad73311_startup(void)
69{
70	pr_debug("%s enter\n", __func__);
71
72	/* Pull up SE pin on AD73311L */
73	gpio_set_value(GPIO_SE, 1);
74	return 0;
75}
76
77static int snd_ad73311_configure(void)
78{
79	unsigned short ctrl_regs[6];
80	unsigned short status = 0;
81	int count = 0;
82
83	/* DMCLK = MCLK = 16.384 MHz
84	 * SCLK = DMCLK/8 = 2.048 MHz
85	 * Sample Rate = DMCLK/2048  = 8 KHz
86	 */
87	ctrl_regs[0] = AD_CONTROL | AD_WRITE | CTRL_REG_B | REGB_MCDIV(0) | \
88			REGB_SCDIV(0) | REGB_DIRATE(0);
89	ctrl_regs[1] = AD_CONTROL | AD_WRITE | CTRL_REG_C | REGC_PUDEV | \
90			REGC_PUADC | REGC_PUDAC | REGC_PUREF | REGC_REFUSE ;
91	ctrl_regs[2] = AD_CONTROL | AD_WRITE | CTRL_REG_D | REGD_OGS(2) | \
92			REGD_IGS(2);
93	ctrl_regs[3] = AD_CONTROL | AD_WRITE | CTRL_REG_E | REGE_DA(0x1f);
94	ctrl_regs[4] = AD_CONTROL | AD_WRITE | CTRL_REG_F | REGF_SEEN ;
95	ctrl_regs[5] = AD_CONTROL | AD_WRITE | CTRL_REG_A | REGA_MODE_DATA;
96
97	local_irq_disable();
98	snd_ad73311_startup();
99	udelay(1);
100
101	bfin_write_SPORT_TCR1(TFSR);
102	bfin_write_SPORT_TCR2(0xF);
103	SSYNC();
104
105	/* SPORT Tx Register is a 8 x 16 FIFO, all the data can be put to
106	 * FIFO before enable SPORT to transfer the data
107	 */
108	for (count = 0; count < 6; count++)
109		bfin_write_SPORT_TX16(ctrl_regs[count]);
110	SSYNC();
111	bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() | TSPEN);
112	SSYNC();
113
114	/* When TUVF is set, the data is already send out */
115	while (!(status & TUVF) && ++count < 10000) {
116		udelay(1);
117		status = bfin_read_SPORT_STAT();
118		SSYNC();
119	}
120	bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() & ~TSPEN);
121	SSYNC();
122	local_irq_enable();
123
124	if (count >= 10000) {
125		printk(KERN_ERR "ad73311: failed to configure codec\n");
126		return -1;
127	}
128	return 0;
129}
130
131static int bf5xx_probe(struct platform_device *pdev)
132{
133	int err;
134	if (gpio_request(GPIO_SE, "AD73311_SE")) {
135		printk(KERN_ERR "%s: Failed ro request GPIO_%d\n", __func__, GPIO_SE);
136		return -EBUSY;
137	}
138
139	gpio_direction_output(GPIO_SE, 0);
140
141	err = snd_ad73311_configure();
142	if (err < 0)
143		return -EFAULT;
144
145	return 0;
146}
147
148static int bf5xx_ad73311_hw_params(struct snd_pcm_substream *substream,
149	struct snd_pcm_hw_params *params)
150{
151	struct snd_soc_pcm_runtime *rtd = substream->private_data;
152	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
153	int ret = 0;
154
155	pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
156		params_format(params));
157
158	/* set cpu DAI configuration */
159	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
160		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
161	if (ret < 0)
162		return ret;
163
164	return 0;
165}
166
167
168static struct snd_soc_ops bf5xx_ad73311_ops = {
169	.hw_params = bf5xx_ad73311_hw_params,
170};
171
172static struct snd_soc_dai_link bf5xx_ad73311_dai[] = {
173	{
174		.name = "ad73311",
175		.stream_name = "AD73311",
176		.cpu_dai_name = "bfin-i2s.0",
177		.codec_dai_name = "ad73311-hifi",
178		.platform_name = "bfin-i2s-pcm-audio",
179		.codec_name = "ad73311",
180		.ops = &bf5xx_ad73311_ops,
181	},
182	{
183		.name = "ad73311",
184		.stream_name = "AD73311",
185		.cpu_dai_name = "bfin-i2s.1",
186		.codec_dai_name = "ad73311-hifi",
187		.platform_name = "bfin-i2s-pcm-audio",
188		.codec_name = "ad73311",
189		.ops = &bf5xx_ad73311_ops,
190	},
191};
192
193static struct snd_soc_card bf5xx_ad73311 = {
194	.name = "bfin-ad73311",
195	.probe = bf5xx_probe,
196	.dai_link = &bf5xx_ad73311_dai[CONFIG_SND_BF5XX_SPORT_NUM],
197	.num_links = 1,
198};
199
200static struct platform_device *bf5xx_ad73311_snd_device;
201
202static int __init bf5xx_ad73311_init(void)
203{
204	int ret;
205
206	pr_debug("%s enter\n", __func__);
207	bf5xx_ad73311_snd_device = platform_device_alloc("soc-audio", -1);
208	if (!bf5xx_ad73311_snd_device)
209		return -ENOMEM;
210
211	platform_set_drvdata(bf5xx_ad73311_snd_device, &bf5xx_ad73311);
212	ret = platform_device_add(bf5xx_ad73311_snd_device);
213
214	if (ret)
215		platform_device_put(bf5xx_ad73311_snd_device);
216
217	return ret;
218}
219
220static void __exit bf5xx_ad73311_exit(void)
221{
222	pr_debug("%s enter\n", __func__);
223	platform_device_unregister(bf5xx_ad73311_snd_device);
224}
225
226module_init(bf5xx_ad73311_init);
227module_exit(bf5xx_ad73311_exit);
228
229/* Module information */
230MODULE_AUTHOR("Cliff Cai");
231MODULE_DESCRIPTION("ALSA SoC AD73311 Blackfin");
232MODULE_LICENSE("GPL");
233
234