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