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
  51 #if CONFIG_SND_BF5XX_SPORT_NUM == 0
  52 #define bfin_write_SPORT_TCR1   bfin_write_SPORT0_TCR1
  53 #define bfin_read_SPORT_TCR1    bfin_read_SPORT0_TCR1
  54 #define bfin_write_SPORT_TCR2   bfin_write_SPORT0_TCR2
  55 #define bfin_write_SPORT_TX16   bfin_write_SPORT0_TX16
  56 #define bfin_read_SPORT_STAT    bfin_read_SPORT0_STAT
  57 #else
  58 #define bfin_write_SPORT_TCR1   bfin_write_SPORT1_TCR1
  59 #define bfin_read_SPORT_TCR1    bfin_read_SPORT1_TCR1
  60 #define bfin_write_SPORT_TCR2   bfin_write_SPORT1_TCR2
  61 #define bfin_write_SPORT_TX16   bfin_write_SPORT1_TX16
  62 #define bfin_read_SPORT_STAT    bfin_read_SPORT1_STAT
  63 #endif
  64
  65 #define GPIO_SE CONFIG_SND_BFIN_AD73311_SE
  66
  67 static struct snd_soc_card bf5xx_ad73311;
  68
  69 static int snd_ad73311_startup(void)
  70 {
  71         pr_debug("%s enter\n", __func__);
  72
  73         /* Pull up SE pin on AD73311L */
  74         gpio_set_value(GPIO_SE, 1);
  75         return 0;
  76 }
  77
  78 static int snd_ad73311_configure(void)
  79 {
  80         unsigned short ctrl_regs[6];
  81         unsigned short status = 0;
  82         int count = 0;
  83
  84         /* DMCLK = MCLK = 16.384 MHz
  85          * SCLK = DMCLK/8 = 2.048 MHz
  86          * Sample Rate = DMCLK/2048  = 8 KHz
  87          */
  88         ctrl_regs[0] = AD_CONTROL | AD_WRITE | CTRL_REG_B | REGB_MCDIV(0) | \
  89                         REGB_SCDIV(0) | REGB_DIRATE(0);
  90         ctrl_regs[1] = AD_CONTROL | AD_WRITE | CTRL_REG_C | REGC_PUDEV | \
  91                         REGC_PUADC | REGC_PUDAC | REGC_PUREF | REGC_REFUSE ;
  92         ctrl_regs[2] = AD_CONTROL | AD_WRITE | CTRL_REG_D | REGD_OGS(2) | \
  93                         REGD_IGS(2);
  94         ctrl_regs[3] = AD_CONTROL | AD_WRITE | CTRL_REG_E | REGE_DA(0x1f);
  95         ctrl_regs[4] = AD_CONTROL | AD_WRITE | CTRL_REG_F | REGF_SEEN ;
  96         ctrl_regs[5] = AD_CONTROL | AD_WRITE | CTRL_REG_A | REGA_MODE_DATA;
  97
  98         local_irq_disable();
  99         snd_ad73311_startup();
 100         udelay(1);
 101
 102         bfin_write_SPORT_TCR1(TFSR);
 103         bfin_write_SPORT_TCR2(0xF);
 104         SSYNC();
 105
 106         /* SPORT Tx Register is a 8 x 16 FIFO, all the data can be put to
 107          * FIFO before enable SPORT to transfer the data
 108          */
 109         for (count = 0; count < 6; count++)
 110                 bfin_write_SPORT_TX16(ctrl_regs[count]);
 111         SSYNC();
 112         bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() | TSPEN);
 113         SSYNC();
 114
 115         /* When TUVF is set, the data is already send out */
 116         while (!(status & TUVF) && ++count < 10000) {
 117                 udelay(1);
 118                 status = bfin_read_SPORT_STAT();
 119                 SSYNC();
 120         }
 121         bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() & ~TSPEN);
 122         SSYNC();
 123         local_irq_enable();
 124
 125         if (count >= 10000) {
 126                 printk(KERN_ERR "ad73311: failed to configure codec\n");
 127                 return -1;
 128         }
 129         return 0;
 130 }
 131
 132 static int bf5xx_probe(struct platform_device *pdev)
 133 {
 134         int err;
 135         if (gpio_request(GPIO_SE, "AD73311_SE")) {
 136                 printk(KERN_ERR "%s: Failed ro request GPIO_%d\n", __func__, GPIO_SE);
 137                 return -EBUSY;
 138         }
 139
 140         gpio_direction_output(GPIO_SE, 0);
 141
 142         err = snd_ad73311_configure();
 143         if (err < 0)
 144                 return -EFAULT;
 145
 146         return 0;
 147 }
 148
 149 static int bf5xx_ad73311_startup(struct snd_pcm_substream *substream)
 150 {
 151         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 152         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 153
 154         pr_debug("%s enter\n", __func__);
 155         snd_soc_dai_set_drvdata(cpu_dai, sport_handle);
 156         return 0;
 157 }
 158
 159 static int bf5xx_ad73311_hw_params(struct snd_pcm_substream *substream,
 160         struct snd_pcm_hw_params *params)
 161 {
 162         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 163         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 164         int ret = 0;
 165
 166         pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
 167                 params_format(params));
 168
 169         /* set cpu DAI configuration */
 170         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
 171                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
 172         if (ret < 0)
 173                 return ret;
 174
 175         return 0;
 176 }
 177
 178
 179 static struct snd_soc_ops bf5xx_ad73311_ops = {
 180         .startup = bf5xx_ad73311_startup,
 181         .hw_params = bf5xx_ad73311_hw_params,
 182 };
 183
 184 static struct snd_soc_dai_link bf5xx_ad73311_dai = {
 185         .name = "ad73311",
 186         .stream_name = "AD73311",
 187         .cpu_dai_name = "bf5xx-i2s",
 188         .codec_dai_name = "ad73311-hifi",
 189         .platform_name = "bfin-pcm-audio",
 190         .codec_name = "ad73311-codec",
 191         .ops = &bf5xx_ad73311_ops,
 192 };
 193
 194 static struct snd_soc_card bf5xx_ad73311 = {
 195         .name = "bf5xx_ad73311",
 196         .probe = bf5xx_probe,
 197         .dai_link = &bf5xx_ad73311_dai,
 198         .num_links = 1,
 199 };
 200
 201 static struct platform_device *bf5xx_ad73311_snd_device;
 202
 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
 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