sound/pci/ice1712/ak4xxx.c

   1 /*
   2  *   ALSA driver for ICEnsemble ICE1712 (Envy24)
   3  *
   4  *   AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface
   5  *
   6  *      Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  *
  22  */
  23
  24 #include <sound/driver.h>
  25 #include <asm/io.h>
  26 #include <linux/delay.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/init.h>
  29 #include <sound/core.h>
  30 #include <sound/initval.h>
  31 #include "ice1712.h"
  32
  33 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  34 MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
  35 MODULE_LICENSE("GPL");
  36
  37 static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip)
  38 {
  39         struct snd_ice1712 *ice = ak->private_data[0];
  40
  41         snd_ice1712_save_gpio_status(ice);
  42 }
  43
  44 static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip)
  45 {
  46         struct snd_ice1712 *ice = ak->private_data[0];
  47
  48         snd_ice1712_restore_gpio_status(ice);
  49 }
  50
  51 /*
  52  * write AK4xxx register
  53  */
  54 static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip,
  55                                       unsigned char addr, unsigned char data)
  56 {
  57         unsigned int tmp;
  58         int idx;
  59         unsigned int addrdata;
  60         struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
  61         struct snd_ice1712 *ice = ak->private_data[0];
  62
  63         snd_assert(chip >= 0 && chip < 4, return);
  64
  65         tmp = snd_ice1712_gpio_read(ice);
  66         tmp |= priv->add_flags;
  67         tmp &= ~priv->mask_flags;
  68         if (priv->cs_mask == priv->cs_addr) {
  69                 if (priv->cif) {
  70                         tmp |= priv->cs_mask; /* start without chip select */
  71                 }  else {
  72                         tmp &= ~priv->cs_mask; /* chip select low */
  73                         snd_ice1712_gpio_write(ice, tmp);
  74                         udelay(1);
  75                 }
  76         } else {
  77                 /* doesn't handle cf=1 yet */
  78                 tmp &= ~priv->cs_mask;
  79                 tmp |= priv->cs_addr;
  80                 snd_ice1712_gpio_write(ice, tmp);
  81                 udelay(1);
  82         }
  83
  84         /* build I2C address + data byte */
  85         addrdata = (priv->caddr << 6) | 0x20 | (addr & 0x1f);
  86         addrdata = (addrdata << 8) | data;
  87         for (idx = 15; idx >= 0; idx--) {
  88                 /* drop clock */
  89                 tmp &= ~priv->clk_mask;
  90                 snd_ice1712_gpio_write(ice, tmp);
  91                 udelay(1);
  92                 /* set data */
  93                 if (addrdata & (1 << idx))
  94                         tmp |= priv->data_mask;
  95                 else
  96                         tmp &= ~priv->data_mask;
  97                 snd_ice1712_gpio_write(ice, tmp);
  98                 udelay(1);
  99                 /* raise clock */
 100                 tmp |= priv->clk_mask;
 101                 snd_ice1712_gpio_write(ice, tmp);
 102                 udelay(1);
 103         }
 104
 105         if (priv->cs_mask == priv->cs_addr) {
 106                 if (priv->cif) {
 107                         /* assert a cs pulse to trigger */
 108                         tmp &= ~priv->cs_mask;
 109                         snd_ice1712_gpio_write(ice, tmp);
 110                         udelay(1);
 111                 }
 112                 tmp |= priv->cs_mask; /* chip select high to trigger */
 113         } else {
 114                 tmp &= ~priv->cs_mask;
 115                 tmp |= priv->cs_none; /* deselect address */
 116         }
 117         snd_ice1712_gpio_write(ice, tmp);
 118         udelay(1);
 119 }
 120
 121 /*
 122  * initialize the struct snd_akm4xxx record with the template
 123  */
 124 int snd_ice1712_akm4xxx_init(struct snd_akm4xxx *ak, const struct snd_akm4xxx *temp,
 125                              const struct snd_ak4xxx_private *_priv, struct snd_ice1712 *ice)
 126 {
 127         struct snd_ak4xxx_private *priv;
 128
 129         if (_priv != NULL) {
 130                 priv = kmalloc(sizeof(*priv), GFP_KERNEL);
 131                 if (priv == NULL)
 132                         return -ENOMEM;
 133                 *priv = *_priv;
 134         } else {
 135                 priv = NULL;
 136         }
 137         *ak = *temp;
 138         ak->card = ice->card;
 139         ak->private_value[0] = (unsigned long)priv;
 140         ak->private_data[0] = ice;
 141         if (ak->ops.lock == NULL)
 142                 ak->ops.lock = snd_ice1712_akm4xxx_lock;
 143         if (ak->ops.unlock == NULL)
 144                 ak->ops.unlock = snd_ice1712_akm4xxx_unlock;
 145         if (ak->ops.write == NULL)
 146                 ak->ops.write = snd_ice1712_akm4xxx_write;
 147         snd_akm4xxx_init(ak);
 148         return 0;
 149 }
 150
 151 void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice)
 152 {
 153         unsigned int akidx;
 154         if (ice->akm == NULL)
 155                 return;
 156         for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
 157                 struct snd_akm4xxx *ak = &ice->akm[akidx];
 158                 kfree((void*)ak->private_value[0]);
 159         }
 160         kfree(ice->akm);
 161 }
 162
 163 /*
 164  * build AK4xxx controls
 165  */
 166 int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice)
 167 {
 168         unsigned int akidx;
 169         int err;
 170
 171         for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
 172                 struct snd_akm4xxx *ak = &ice->akm[akidx];
 173                 err = snd_akm4xxx_build_controls(ak);
 174                 if (err < 0)
 175                         return err;
 176         }
 177         return 0;
 178 }
 179
 180 static int __init alsa_ice1712_akm4xxx_module_init(void)
 181 {
 182         return 0;
 183 }
 184
 185 static void __exit alsa_ice1712_akm4xxx_module_exit(void)
 186 {
 187 }
 188
 189 module_init(alsa_ice1712_akm4xxx_module_init)
 190 module_exit(alsa_ice1712_akm4xxx_module_exit)
 191
 192 EXPORT_SYMBOL(snd_ice1712_akm4xxx_init);
 193 EXPORT_SYMBOL(snd_ice1712_akm4xxx_free);
 194 EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls);