2 * ALSA driver for ICEnsemble ICE1712 (Envy24)
4 * AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface
6 * Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
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.
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.
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
25 #include <linux/delay.h>
26 #include <linux/interrupt.h>
27 #include <linux/slab.h>
28 #include <linux/init.h>
29 #include <sound/core.h>
30 #include <sound/initval.h>
33 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
34 MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
35 MODULE_LICENSE("GPL");
37 static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip)
39 struct snd_ice1712 *ice = ak->private_data[0];
41 snd_ice1712_save_gpio_status(ice);
44 static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip)
46 struct snd_ice1712 *ice = ak->private_data[0];
48 snd_ice1712_restore_gpio_status(ice);
52 * write AK4xxx register
54 static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip,
55 unsigned char addr, unsigned char data)
59 unsigned int addrdata;
60 struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
61 struct snd_ice1712 *ice = ak->private_data[0];
63 if (snd_BUG_ON(chip < 0 || chip >= 4))
66 tmp = snd_ice1712_gpio_read(ice);
67 tmp |= priv->add_flags;
68 tmp &= ~priv->mask_flags;
69 if (priv->cs_mask == priv->cs_addr) {
71 tmp |= priv->cs_mask; /* start without chip select */
73 tmp &= ~priv->cs_mask; /* chip select low */
74 snd_ice1712_gpio_write(ice, tmp);
78 /* doesn't handle cf=1 yet */
79 tmp &= ~priv->cs_mask;
81 snd_ice1712_gpio_write(ice, tmp);
85 /* build I2C address + data byte */
86 addrdata = (priv->caddr << 6) | 0x20 | (addr & 0x1f);
87 addrdata = (addrdata << 8) | data;
88 for (idx = 15; idx >= 0; idx--) {
90 tmp &= ~priv->clk_mask;
91 snd_ice1712_gpio_write(ice, tmp);
94 if (addrdata & (1 << idx))
95 tmp |= priv->data_mask;
97 tmp &= ~priv->data_mask;
98 snd_ice1712_gpio_write(ice, tmp);
101 tmp |= priv->clk_mask;
102 snd_ice1712_gpio_write(ice, tmp);
106 if (priv->cs_mask == priv->cs_addr) {
108 /* assert a cs pulse to trigger */
109 tmp &= ~priv->cs_mask;
110 snd_ice1712_gpio_write(ice, tmp);
113 tmp |= priv->cs_mask; /* chip select high to trigger */
115 tmp &= ~priv->cs_mask;
116 tmp |= priv->cs_none; /* deselect address */
118 snd_ice1712_gpio_write(ice, tmp);
123 * initialize the struct snd_akm4xxx record with the template
125 int snd_ice1712_akm4xxx_init(struct snd_akm4xxx *ak, const struct snd_akm4xxx *temp,
126 const struct snd_ak4xxx_private *_priv, struct snd_ice1712 *ice)
128 struct snd_ak4xxx_private *priv;
131 priv = kmalloc(sizeof(*priv), GFP_KERNEL);
139 ak->card = ice->card;
140 ak->private_value[0] = (unsigned long)priv;
141 ak->private_data[0] = ice;
142 if (ak->ops.lock == NULL)
143 ak->ops.lock = snd_ice1712_akm4xxx_lock;
144 if (ak->ops.unlock == NULL)
145 ak->ops.unlock = snd_ice1712_akm4xxx_unlock;
146 if (ak->ops.write == NULL)
147 ak->ops.write = snd_ice1712_akm4xxx_write;
148 snd_akm4xxx_init(ak);
152 void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice)
155 if (ice->akm == NULL)
157 for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
158 struct snd_akm4xxx *ak = &ice->akm[akidx];
159 kfree((void*)ak->private_value[0]);
165 * build AK4xxx controls
167 int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice)
172 for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
173 struct snd_akm4xxx *ak = &ice->akm[akidx];
174 err = snd_akm4xxx_build_controls(ak);
181 static int __init alsa_ice1712_akm4xxx_module_init(void)
186 static void __exit alsa_ice1712_akm4xxx_module_exit(void)
190 module_init(alsa_ice1712_akm4xxx_module_init)
191 module_exit(alsa_ice1712_akm4xxx_module_exit)
193 EXPORT_SYMBOL(snd_ice1712_akm4xxx_init);
194 EXPORT_SYMBOL(snd_ice1712_akm4xxx_free);
195 EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls);