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 <asm/io.h>
  25 #include <linux/delay.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/init.h>
  28 #include <sound/core.h>
  29 #include <sound/initval.h>
  30 #include "ice1712.h"
  31
  32 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  33 MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
  34 MODULE_LICENSE("GPL");
  35
  36 static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip)
  37 {
  38         struct snd_ice1712 *ice = ak->private_data[0];
  39
  40         snd_ice1712_save_gpio_status(ice);
  41 }
  42
  43 static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip)
  44 {
  45         struct snd_ice1712 *ice = ak->private_data[0];
  46
  47         snd_ice1712_restore_gpio_status(ice);
  48 }
  49
  50 /*
  51  * write AK4xxx register
  52  */
  53 static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip,
  54                                       unsigned char addr, unsigned char data)
  55 {
  56         unsigned int tmp;
  57         int idx;
  58         unsigned int addrdata;
  59         struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
  60         struct snd_ice1712 *ice = ak->private_data[0];
  61
  62         snd_assert(chip >= 0 && chip < 4, return);
  63
  64         tmp = snd_ice1712_gpio_read(ice);
  65         tmp |= priv->add_flags;
  66         tmp &= ~priv->mask_flags;
  67         if (priv->cs_mask == priv->cs_addr) {
  68                 if (priv->cif) {
  69                         tmp |= priv->cs_mask; /* start without chip select */
  70                 }  else {
  71                         tmp &= ~priv->cs_mask; /* chip select low */
  72                         snd_ice1712_gpio_write(ice, tmp);
  73                         udelay(1);
  74                 }
  75         } else {
  76                 /* doesn't handle cf=1 yet */
  77                 tmp &= ~priv->cs_mask;
  78                 tmp |= priv->cs_addr;
  79                 snd_ice1712_gpio_write(ice, tmp);
  80                 udelay(1);
  81         }
  82
  83         /* build I2C address + data byte */
  84         addrdata = (priv->caddr << 6) | 0x20 | (addr & 0x1f);
  85         addrdata = (addrdata << 8) | data;
  86         for (idx = 15; idx >= 0; idx--) {
  87                 /* drop clock */
  88                 tmp &= ~priv->clk_mask;
  89                 snd_ice1712_gpio_write(ice, tmp);
  90                 udelay(1);
  91                 /* set data */
  92                 if (addrdata & (1 << idx))
  93                         tmp |= priv->data_mask;
  94                 else
  95                         tmp &= ~priv->data_mask;
  96                 snd_ice1712_gpio_write(ice, tmp);
  97                 udelay(1);
  98                 /* raise clock */
  99                 tmp |= priv->clk_mask;
 100                 snd_ice1712_gpio_write(ice, tmp);
 101                 udelay(1);
 102         }
 103
 104         if (priv->cs_mask == priv->cs_addr) {
 105                 if (priv->cif) {
 106                         /* assert a cs pulse to trigger */
 107                         tmp &= ~priv->cs_mask;
 108                         snd_ice1712_gpio_write(ice, tmp);
 109                         udelay(1);
 110                 }
 111                 tmp |= priv->cs_mask; /* chip select high to trigger */
 112         } else {
 113                 tmp &= ~priv->cs_mask;
 114                 tmp |= priv->cs_none; /* deselect address */
 115         }
 116         snd_ice1712_gpio_write(ice, tmp);
 117         udelay(1);
 118 }
 119
 120 /*
 121  * initialize the struct snd_akm4xxx record with the template
 122  */
 123 int snd_ice1712_akm4xxx_init(struct snd_akm4xxx *ak, const struct snd_akm4xxx *temp,
 124                              const struct snd_ak4xxx_private *_priv, struct snd_ice1712 *ice)
 125 {
 126         struct snd_ak4xxx_private *priv;
 127
 128         if (_priv != NULL) {
 129                 priv = kmalloc(sizeof(*priv), GFP_KERNEL);
 130                 if (priv == NULL)
 131                         return -ENOMEM;
 132                 *priv = *_priv;
 133         } else {
 134                 priv = NULL;
 135         }
 136         *ak = *temp;
 137         ak->card = ice->card;
 138         ak->private_value[0] = (unsigned long)priv;
 139         ak->private_data[0] = ice;
 140         if (ak->ops.lock == NULL)
 141                 ak->ops.lock = snd_ice1712_akm4xxx_lock;
 142         if (ak->ops.unlock == NULL)
 143                 ak->ops.unlock = snd_ice1712_akm4xxx_unlock;
 144         if (ak->ops.write == NULL)
 145                 ak->ops.write = snd_ice1712_akm4xxx_write;
 146         snd_akm4xxx_init(ak);
 147         return 0;
 148 }
 149
 150 void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice)
 151 {
 152         unsigned int akidx;
 153         if (ice->akm == NULL)
 154                 return;
 155         for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
 156                 struct snd_akm4xxx *ak = &ice->akm[akidx];
 157                 kfree((void*)ak->private_value[0]);
 158         }
 159         kfree(ice->akm);
 160 }
 161
 162 /*
 163  * build AK4xxx controls
 164  */
 165 int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice)
 166 {
 167         unsigned int akidx;
 168         int err;
 169
 170         for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
 171                 struct snd_akm4xxx *ak = &ice->akm[akidx];
 172                 err = snd_akm4xxx_build_controls(ak);
 173                 if (err < 0)
 174                         return err;
 175         }
 176         return 0;
 177 }
 178
 179 static int __init alsa_ice1712_akm4xxx_module_init(void)
 180 {
 181         return 0;
 182 }
 183
 184 static void __exit alsa_ice1712_akm4xxx_module_exit(void)
 185 {
 186 }
 187
 188 module_init(alsa_ice1712_akm4xxx_module_init)
 189 module_exit(alsa_ice1712_akm4xxx_module_exit)
 190
 191 EXPORT_SYMBOL(snd_ice1712_akm4xxx_init);
 192 EXPORT_SYMBOL(snd_ice1712_akm4xxx_free);
 193 EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls);