release/src-rt-6.x.4708/linux/linux-2.6.36/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");