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
66 static struct snd_soc_card bf5xx_ad73311;
67
snd_ad73311_startup(void)68 static 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
snd_ad73311_configure(void)77 static 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
bf5xx_probe(struct snd_soc_card * card)131 static int bf5xx_probe(struct snd_soc_card *card)
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
bf5xx_ad73311_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)148 static 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
168 static struct snd_soc_ops bf5xx_ad73311_ops = {
169 .hw_params = bf5xx_ad73311_hw_params,
170 };
171
172 static 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
193 static struct snd_soc_card bf5xx_ad73311 = {
194 .name = "bfin-ad73311",
195 .owner = THIS_MODULE,
196 .probe = bf5xx_probe,
197 .dai_link = &bf5xx_ad73311_dai[CONFIG_SND_BF5XX_SPORT_NUM],
198 .num_links = 1,
199 };
200
201 static struct platform_device *bf5xx_ad73311_snd_device;
202
bf5xx_ad73311_init(void)203 static int __init bf5xx_ad73311_init(void)
204 {
205 int ret;
206
207 pr_debug("%s enter\n", __func__);
208 bf5xx_ad73311_snd_device = platform_device_alloc("soc-audio", -1);
209 if (!bf5xx_ad73311_snd_device)
210 return -ENOMEM;
211
212 platform_set_drvdata(bf5xx_ad73311_snd_device, &bf5xx_ad73311);
213 ret = platform_device_add(bf5xx_ad73311_snd_device);
214
215 if (ret)
216 platform_device_put(bf5xx_ad73311_snd_device);
217
218 return ret;
219 }
220
bf5xx_ad73311_exit(void)221 static void __exit bf5xx_ad73311_exit(void)
222 {
223 pr_debug("%s enter\n", __func__);
224 platform_device_unregister(bf5xx_ad73311_snd_device);
225 }
226
227 module_init(bf5xx_ad73311_init);
228 module_exit(bf5xx_ad73311_exit);
229
230 /* Module information */
231 MODULE_AUTHOR("Cliff Cai");
232 MODULE_DESCRIPTION("ALSA SoC AD73311 Blackfin");
233 MODULE_LICENSE("GPL");
234
235