Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[pandora-kernel.git] / sound / soc / blackfin / bf5xx-ad73311.c
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/soc-dapm.h>
39 #include <sound/pcm_params.h>
40
41 #include <asm/blackfin.h>
42 #include <asm/cacheflush.h>
43 #include <asm/irq.h>
44 #include <asm/dma.h>
45 #include <asm/portmux.h>
46
47 #include "../codecs/ad73311.h"
48 #include "bf5xx-sport.h"
49 #include "bf5xx-i2s-pcm.h"
50 #include "bf5xx-i2s.h"
51
52 #if CONFIG_SND_BF5XX_SPORT_NUM == 0
53 #define bfin_write_SPORT_TCR1   bfin_write_SPORT0_TCR1
54 #define bfin_read_SPORT_TCR1    bfin_read_SPORT0_TCR1
55 #define bfin_write_SPORT_TCR2   bfin_write_SPORT0_TCR2
56 #define bfin_write_SPORT_TX16   bfin_write_SPORT0_TX16
57 #define bfin_read_SPORT_STAT    bfin_read_SPORT0_STAT
58 #else
59 #define bfin_write_SPORT_TCR1   bfin_write_SPORT1_TCR1
60 #define bfin_read_SPORT_TCR1    bfin_read_SPORT1_TCR1
61 #define bfin_write_SPORT_TCR2   bfin_write_SPORT1_TCR2
62 #define bfin_write_SPORT_TX16   bfin_write_SPORT1_TX16
63 #define bfin_read_SPORT_STAT    bfin_read_SPORT1_STAT
64 #endif
65
66 #define GPIO_SE CONFIG_SND_BFIN_AD73311_SE
67
68 static struct snd_soc_card bf5xx_ad73311;
69
70 static int snd_ad73311_startup(void)
71 {
72         pr_debug("%s enter\n", __func__);
73
74         /* Pull up SE pin on AD73311L */
75         gpio_set_value(GPIO_SE, 1);
76         return 0;
77 }
78
79 static int snd_ad73311_configure(void)
80 {
81         unsigned short ctrl_regs[6];
82         unsigned short status = 0;
83         int count = 0;
84
85         /* DMCLK = MCLK = 16.384 MHz
86          * SCLK = DMCLK/8 = 2.048 MHz
87          * Sample Rate = DMCLK/2048  = 8 KHz
88          */
89         ctrl_regs[0] = AD_CONTROL | AD_WRITE | CTRL_REG_B | REGB_MCDIV(0) | \
90                         REGB_SCDIV(0) | REGB_DIRATE(0);
91         ctrl_regs[1] = AD_CONTROL | AD_WRITE | CTRL_REG_C | REGC_PUDEV | \
92                         REGC_PUADC | REGC_PUDAC | REGC_PUREF | REGC_REFUSE ;
93         ctrl_regs[2] = AD_CONTROL | AD_WRITE | CTRL_REG_D | REGD_OGS(2) | \
94                         REGD_IGS(2);
95         ctrl_regs[3] = AD_CONTROL | AD_WRITE | CTRL_REG_E | REGE_DA(0x1f);
96         ctrl_regs[4] = AD_CONTROL | AD_WRITE | CTRL_REG_F | REGF_SEEN ;
97         ctrl_regs[5] = AD_CONTROL | AD_WRITE | CTRL_REG_A | REGA_MODE_DATA;
98
99         local_irq_disable();
100         snd_ad73311_startup();
101         udelay(1);
102
103         bfin_write_SPORT_TCR1(TFSR);
104         bfin_write_SPORT_TCR2(0xF);
105         SSYNC();
106
107         /* SPORT Tx Register is a 8 x 16 FIFO, all the data can be put to
108          * FIFO before enable SPORT to transfer the data
109          */
110         for (count = 0; count < 6; count++)
111                 bfin_write_SPORT_TX16(ctrl_regs[count]);
112         SSYNC();
113         bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() | TSPEN);
114         SSYNC();
115
116         /* When TUVF is set, the data is already send out */
117         while (!(status & TUVF) && ++count < 10000) {
118                 udelay(1);
119                 status = bfin_read_SPORT_STAT();
120                 SSYNC();
121         }
122         bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() & ~TSPEN);
123         SSYNC();
124         local_irq_enable();
125
126         if (count >= 10000) {
127                 printk(KERN_ERR "ad73311: failed to configure codec\n");
128                 return -1;
129         }
130         return 0;
131 }
132
133 static int bf5xx_probe(struct platform_device *pdev)
134 {
135         int err;
136         if (gpio_request(GPIO_SE, "AD73311_SE")) {
137                 printk(KERN_ERR "%s: Failed ro request GPIO_%d\n", __func__, GPIO_SE);
138                 return -EBUSY;
139         }
140
141         gpio_direction_output(GPIO_SE, 0);
142
143         err = snd_ad73311_configure();
144         if (err < 0)
145                 return -EFAULT;
146
147         return 0;
148 }
149
150 static int bf5xx_ad73311_startup(struct snd_pcm_substream *substream)
151 {
152         struct snd_soc_pcm_runtime *rtd = substream->private_data;
153         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
154
155         pr_debug("%s enter\n", __func__);
156         cpu_dai->private_data = sport_handle;
157         return 0;
158 }
159
160 static int bf5xx_ad73311_hw_params(struct snd_pcm_substream *substream,
161         struct snd_pcm_hw_params *params)
162 {
163         struct snd_soc_pcm_runtime *rtd = substream->private_data;
164         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
165         int ret = 0;
166
167         pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
168                 params_format(params));
169
170         /* set cpu DAI configuration */
171         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
172                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
173         if (ret < 0)
174                 return ret;
175
176         return 0;
177 }
178
179
180 static struct snd_soc_ops bf5xx_ad73311_ops = {
181         .startup = bf5xx_ad73311_startup,
182         .hw_params = bf5xx_ad73311_hw_params,
183 };
184
185 static struct snd_soc_dai_link bf5xx_ad73311_dai = {
186         .name = "ad73311",
187         .stream_name = "AD73311",
188         .cpu_dai = &bf5xx_i2s_dai,
189         .codec_dai = &ad73311_dai,
190         .ops = &bf5xx_ad73311_ops,
191 };
192
193 static struct snd_soc_card bf5xx_ad73311 = {
194         .name = "bf5xx_ad73311",
195         .platform = &bf5xx_i2s_soc_platform,
196         .probe = bf5xx_probe,
197         .dai_link = &bf5xx_ad73311_dai,
198         .num_links = 1,
199 };
200
201 static struct snd_soc_device bf5xx_ad73311_snd_devdata = {
202         .card = &bf5xx_ad73311,
203         .codec_dev = &soc_codec_dev_ad73311,
204 };
205
206 static struct platform_device *bf5xx_ad73311_snd_device;
207
208 static int __init bf5xx_ad73311_init(void)
209 {
210         int ret;
211
212         pr_debug("%s enter\n", __func__);
213         bf5xx_ad73311_snd_device = platform_device_alloc("soc-audio", -1);
214         if (!bf5xx_ad73311_snd_device)
215                 return -ENOMEM;
216
217         platform_set_drvdata(bf5xx_ad73311_snd_device, &bf5xx_ad73311_snd_devdata);
218         bf5xx_ad73311_snd_devdata.dev = &bf5xx_ad73311_snd_device->dev;
219         ret = platform_device_add(bf5xx_ad73311_snd_device);
220
221         if (ret)
222                 platform_device_put(bf5xx_ad73311_snd_device);
223
224         return ret;
225 }
226
227 static void __exit bf5xx_ad73311_exit(void)
228 {
229         pr_debug("%s enter\n", __func__);
230         platform_device_unregister(bf5xx_ad73311_snd_device);
231 }
232
233 module_init(bf5xx_ad73311_init);
234 module_exit(bf5xx_ad73311_exit);
235
236 /* Module information */
237 MODULE_AUTHOR("Cliff Cai");
238 MODULE_DESCRIPTION("ALSA SoC AD73311 Blackfin");
239 MODULE_LICENSE("GPL");
240