![Takashi Iwai](/assets/img/avatar_default.png)
Nowadays it's recommended. Replace all in a shot. Signed-off-by: Takashi Iwai <tiwai@suse.de>
197 lines
5 KiB
C
197 lines
5 KiB
C
/*
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* ALSA driver for ICEnsemble ICE1712 (Envy24)
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*
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* AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface
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*
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* Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include "ice1712.h"
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MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
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MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
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MODULE_LICENSE("GPL");
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static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip)
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{
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struct snd_ice1712 *ice = ak->private_data[0];
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snd_ice1712_save_gpio_status(ice);
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}
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static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip)
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{
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struct snd_ice1712 *ice = ak->private_data[0];
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snd_ice1712_restore_gpio_status(ice);
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}
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/*
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* write AK4xxx register
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*/
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static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip,
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unsigned char addr, unsigned char data)
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{
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unsigned int tmp;
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int idx;
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unsigned int addrdata;
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struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
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struct snd_ice1712 *ice = ak->private_data[0];
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if (snd_BUG_ON(chip < 0 || chip >= 4))
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return;
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tmp = snd_ice1712_gpio_read(ice);
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tmp |= priv->add_flags;
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tmp &= ~priv->mask_flags;
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if (priv->cs_mask == priv->cs_addr) {
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if (priv->cif) {
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tmp |= priv->cs_mask; /* start without chip select */
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} else {
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tmp &= ~priv->cs_mask; /* chip select low */
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snd_ice1712_gpio_write(ice, tmp);
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udelay(1);
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}
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} else {
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/* doesn't handle cf=1 yet */
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tmp &= ~priv->cs_mask;
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tmp |= priv->cs_addr;
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snd_ice1712_gpio_write(ice, tmp);
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udelay(1);
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}
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/* build I2C address + data byte */
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addrdata = (priv->caddr << 6) | 0x20 | (addr & 0x1f);
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addrdata = (addrdata << 8) | data;
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for (idx = 15; idx >= 0; idx--) {
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/* drop clock */
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tmp &= ~priv->clk_mask;
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snd_ice1712_gpio_write(ice, tmp);
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udelay(1);
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/* set data */
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if (addrdata & (1 << idx))
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tmp |= priv->data_mask;
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else
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tmp &= ~priv->data_mask;
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snd_ice1712_gpio_write(ice, tmp);
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udelay(1);
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/* raise clock */
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tmp |= priv->clk_mask;
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snd_ice1712_gpio_write(ice, tmp);
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udelay(1);
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}
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if (priv->cs_mask == priv->cs_addr) {
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if (priv->cif) {
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/* assert a cs pulse to trigger */
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tmp &= ~priv->cs_mask;
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snd_ice1712_gpio_write(ice, tmp);
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udelay(1);
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}
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tmp |= priv->cs_mask; /* chip select high to trigger */
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} else {
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tmp &= ~priv->cs_mask;
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tmp |= priv->cs_none; /* deselect address */
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}
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snd_ice1712_gpio_write(ice, tmp);
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udelay(1);
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}
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/*
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* initialize the struct snd_akm4xxx record with the template
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*/
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int snd_ice1712_akm4xxx_init(struct snd_akm4xxx *ak, const struct snd_akm4xxx *temp,
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const struct snd_ak4xxx_private *_priv, struct snd_ice1712 *ice)
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{
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struct snd_ak4xxx_private *priv;
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if (_priv != NULL) {
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priv = kmalloc(sizeof(*priv), GFP_KERNEL);
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if (priv == NULL)
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return -ENOMEM;
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*priv = *_priv;
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} else {
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priv = NULL;
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}
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*ak = *temp;
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ak->card = ice->card;
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ak->private_value[0] = (unsigned long)priv;
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ak->private_data[0] = ice;
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if (ak->ops.lock == NULL)
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ak->ops.lock = snd_ice1712_akm4xxx_lock;
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if (ak->ops.unlock == NULL)
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ak->ops.unlock = snd_ice1712_akm4xxx_unlock;
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if (ak->ops.write == NULL)
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ak->ops.write = snd_ice1712_akm4xxx_write;
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snd_akm4xxx_init(ak);
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return 0;
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}
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void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice)
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{
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unsigned int akidx;
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if (ice->akm == NULL)
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return;
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for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
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struct snd_akm4xxx *ak = &ice->akm[akidx];
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kfree((void*)ak->private_value[0]);
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}
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kfree(ice->akm);
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}
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/*
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* build AK4xxx controls
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*/
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int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice)
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{
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unsigned int akidx;
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int err;
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for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
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struct snd_akm4xxx *ak = &ice->akm[akidx];
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err = snd_akm4xxx_build_controls(ak);
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if (err < 0)
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return err;
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}
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return 0;
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}
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static int __init alsa_ice1712_akm4xxx_module_init(void)
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{
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return 0;
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}
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static void __exit alsa_ice1712_akm4xxx_module_exit(void)
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{
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}
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module_init(alsa_ice1712_akm4xxx_module_init)
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module_exit(alsa_ice1712_akm4xxx_module_exit)
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EXPORT_SYMBOL(snd_ice1712_akm4xxx_init);
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EXPORT_SYMBOL(snd_ice1712_akm4xxx_free);
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EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls);
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