kernel/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/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
  49 #if CONFIG_SND_BF5XX_SPORT_NUM == 0
  50 #define bfin_write_SPORT_TCR1   bfin_write_SPORT0_TCR1
  51 #define bfin_read_SPORT_TCR1    bfin_read_SPORT0_TCR1
  52 #define bfin_write_SPORT_TCR2   bfin_write_SPORT0_TCR2
  53 #define bfin_write_SPORT_TX16   bfin_write_SPORT0_TX16
  54 #define bfin_read_SPORT_STAT    bfin_read_SPORT0_STAT
  55 #else
  56 #define bfin_write_SPORT_TCR1   bfin_write_SPORT1_TCR1
  57 #define bfin_read_SPORT_TCR1    bfin_read_SPORT1_TCR1
  58 #define bfin_write_SPORT_TCR2   bfin_write_SPORT1_TCR2
  59 #define bfin_write_SPORT_TX16   bfin_write_SPORT1_TX16
  60 #define bfin_read_SPORT_STAT    bfin_read_SPORT1_STAT
  61 #endif
  62
  63 #define GPIO_SE CONFIG_SND_BFIN_AD73311_SE
  64
  65 static struct snd_soc_card bf5xx_ad73311;
  66
  67 static int snd_ad73311_startup(void)
  68 {
  69         pr_debug("%s enter\n", __func__);
  70
  71         /* Pull up SE pin on AD73311L */
  72         gpio_set_value(GPIO_SE, 1);
  73         return 0;
  74 }
  75
  76 static int snd_ad73311_configure(void)
  77 {
  78         unsigned short ctrl_regs[6];
  79         unsigned short status = 0;
  80         int count = 0;
  81
  82         /* DMCLK = MCLK = 16.384 MHz
  83          * SCLK = DMCLK/8 = 2.048 MHz
  84          * Sample Rate = DMCLK/2048  = 8 KHz
  85          */
  86         ctrl_regs[0] = AD_CONTROL | AD_WRITE | CTRL_REG_B | REGB_MCDIV(0) | \
  87                         REGB_SCDIV(0) | REGB_DIRATE(0);
  88         ctrl_regs[1] = AD_CONTROL | AD_WRITE | CTRL_REG_C | REGC_PUDEV | \
  89                         REGC_PUADC | REGC_PUDAC | REGC_PUREF | REGC_REFUSE ;
  90         ctrl_regs[2] = AD_CONTROL | AD_WRITE | CTRL_REG_D | REGD_OGS(2) | \
  91                         REGD_IGS(2);
  92         ctrl_regs[3] = AD_CONTROL | AD_WRITE | CTRL_REG_E | REGE_DA(0x1f);
  93         ctrl_regs[4] = AD_CONTROL | AD_WRITE | CTRL_REG_F | REGF_SEEN ;
  94         ctrl_regs[5] = AD_CONTROL | AD_WRITE | CTRL_REG_A | REGA_MODE_DATA;
  95
  96         local_irq_disable();
  97         snd_ad73311_startup();
  98         udelay(1);
  99
 100         bfin_write_SPORT_TCR1(TFSR);
 101         bfin_write_SPORT_TCR2(0xF);
 102         SSYNC();
 103
 104         /* SPORT Tx Register is a 8 x 16 FIFO, all the data can be put to
 105          * FIFO before enable SPORT to transfer the data
 106          */
 107         for (count = 0; count < 6; count++)
 108                 bfin_write_SPORT_TX16(ctrl_regs[count]);
 109         SSYNC();
 110         bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() | TSPEN);
 111         SSYNC();
 112
 113         /* When TUVF is set, the data is already send out */
 114         while (!(status & TUVF) && ++count < 10000) {
 115                 udelay(1);
 116                 status = bfin_read_SPORT_STAT();
 117                 SSYNC();
 118         }
 119         bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() & ~TSPEN);
 120         SSYNC();
 121         local_irq_enable();
 122
 123         if (count >= 10000) {
 124                 printk(KERN_ERR "ad73311: failed to configure codec\n");
 125                 return -1;
 126         }
 127         return 0;
 128 }
 129
 130 static int bf5xx_probe(struct snd_soc_card *card)
 131 {
 132         int err;
 133         if (gpio_request(GPIO_SE, "AD73311_SE")) {
 134                 printk(KERN_ERR "%s: Failed ro request GPIO_%d\n", __func__, GPIO_SE);
 135                 return -EBUSY;
 136         }
 137
 138         gpio_direction_output(GPIO_SE, 0);
 139
 140         err = snd_ad73311_configure();
 141         if (err < 0)
 142                 return -EFAULT;
 143
 144         return 0;
 145 }
 146
 147 #define BF5XX_AD7311_DAI_FMT (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF | \
 148                                 SND_SOC_DAIFMT_CBM_CFM)
 149
 150 static struct snd_soc_dai_link bf5xx_ad73311_dai[] = {
 151         {
 152                 .name = "ad73311",
 153                 .stream_name = "AD73311",
 154                 .cpu_dai_name = "bfin-i2s.0",
 155                 .codec_dai_name = "ad73311-hifi",
 156                 .platform_name = "bfin-i2s-pcm-audio",
 157                 .codec_name = "ad73311",
 158                 .dai_fmt = BF5XX_AD7311_DAI_FMT,
 159         },
 160         {
 161                 .name = "ad73311",
 162                 .stream_name = "AD73311",
 163                 .cpu_dai_name = "bfin-i2s.1",
 164                 .codec_dai_name = "ad73311-hifi",
 165                 .platform_name = "bfin-i2s-pcm-audio",
 166                 .codec_name = "ad73311",
 167                 .dai_fmt = BF5XX_AD7311_DAI_FMT,
 168         },
 169 };
 170
 171 static struct snd_soc_card bf5xx_ad73311 = {
 172         .name = "bfin-ad73311",
 173         .owner = THIS_MODULE,
 174         .probe = bf5xx_probe,
 175         .dai_link = &bf5xx_ad73311_dai[CONFIG_SND_BF5XX_SPORT_NUM],
 176         .num_links = 1,
 177 };
 178
 179 static struct platform_device *bf5xx_ad73311_snd_device;
 180
 181 static int __init bf5xx_ad73311_init(void)
 182 {
 183         int ret;
 184
 185         pr_debug("%s enter\n", __func__);
 186         bf5xx_ad73311_snd_device = platform_device_alloc("soc-audio", -1);
 187         if (!bf5xx_ad73311_snd_device)
 188                 return -ENOMEM;
 189
 190         platform_set_drvdata(bf5xx_ad73311_snd_device, &bf5xx_ad73311);
 191         ret = platform_device_add(bf5xx_ad73311_snd_device);
 192
 193         if (ret)
 194                 platform_device_put(bf5xx_ad73311_snd_device);
 195
 196         return ret;
 197 }
 198
 199 static void __exit bf5xx_ad73311_exit(void)
 200 {
 201         pr_debug("%s enter\n", __func__);
 202         platform_device_unregister(bf5xx_ad73311_snd_device);
 203 }
 204
 205 module_init(bf5xx_ad73311_init);
 206 module_exit(bf5xx_ad73311_exit);
 207
 208 /* Module information */
 209 MODULE_AUTHOR("Cliff Cai");
 210 MODULE_DESCRIPTION("ALSA SoC AD73311 Blackfin");
 211 MODULE_LICENSE("GPL");
 212