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 #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
  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
  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
 131 static int bf5xx_probe(struct platform_device *pdev)
 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
 148 static int bf5xx_ad73311_startup(struct snd_pcm_substream *substream)
 149 {
 150         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 151         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 152
 153         pr_debug("%s enter\n", __func__);
 154         snd_soc_dai_set_drvdata(cpu_dai, sport_handle);
 155         return 0;
 156 }
 157
 158 static int bf5xx_ad73311_hw_params(struct snd_pcm_substream *substream,
 159         struct snd_pcm_hw_params *params)
 160 {
 161         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 162         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 163         int ret = 0;
 164
 165         pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
 166                 params_format(params));
 167
 168         /* set cpu DAI configuration */
 169         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
 170                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
 171         if (ret < 0)
 172                 return ret;
 173
 174         return 0;
 175 }
 176
 177
 178 static struct snd_soc_ops bf5xx_ad73311_ops = {
 179         .startup = bf5xx_ad73311_startup,
 180         .hw_params = bf5xx_ad73311_hw_params,
 181 };
 182
 183 static struct snd_soc_dai_link bf5xx_ad73311_dai = {
 184         .name = "ad73311",
 185         .stream_name = "AD73311",
 186         .cpu_dai_name = "bf5xx-i2s",
 187         .codec_dai_name = "ad73311-hifi",
 188         .platform_name = "bfin-pcm-audio",
 189         .codec_name = "ad73311-codec",
 190         .ops = &bf5xx_ad73311_ops,
 191 };
 192
 193 static struct snd_soc_card bf5xx_ad73311 = {
 194         .name = "bf5xx_ad73311",
 195         .probe = bf5xx_probe,
 196         .dai_link = &bf5xx_ad73311_dai,
 197         .num_links = 1,
 198 };
 199
 200 static struct platform_device *bf5xx_ad73311_snd_device;
 201
 202 static int __init bf5xx_ad73311_init(void)
 203 {
 204         int ret;
 205
 206         pr_debug("%s enter\n", __func__);
 207         bf5xx_ad73311_snd_device = platform_device_alloc("soc-audio", -1);
 208         if (!bf5xx_ad73311_snd_device)
 209                 return -ENOMEM;
 210
 211         platform_set_drvdata(bf5xx_ad73311_snd_device, &bf5xx_ad73311);
 212         ret = platform_device_add(bf5xx_ad73311_snd_device);
 213
 214         if (ret)
 215                 platform_device_put(bf5xx_ad73311_snd_device);
 216
 217         return ret;
 218 }
 219
 220 static void __exit bf5xx_ad73311_exit(void)
 221 {
 222         pr_debug("%s enter\n", __func__);
 223         platform_device_unregister(bf5xx_ad73311_snd_device);
 224 }
 225
 226 module_init(bf5xx_ad73311_init);
 227 module_exit(bf5xx_ad73311_exit);
 228
 229 /* Module information */
 230 MODULE_AUTHOR("Cliff Cai");
 231 MODULE_DESCRIPTION("ALSA SoC AD73311 Blackfin");
 232 MODULE_LICENSE("GPL");
 233