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/init.h>
28 #include <sound/core.h>
29 #include <sound/initval.h>
32 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
33 MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
34 MODULE_LICENSE("GPL");
36 static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip)
38 struct snd_ice1712 *ice = ak->private_data[0];
40 snd_ice1712_save_gpio_status(ice);
43 static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip)
45 struct snd_ice1712 *ice = ak->private_data[0];
47 snd_ice1712_restore_gpio_status(ice);
51 * write AK4xxx register
53 static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip,
54 unsigned char addr, unsigned char data)
58 unsigned int addrdata;
59 struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
60 struct snd_ice1712 *ice = ak->private_data[0];
62 snd_assert(chip >= 0 && chip < 4, return);
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) {
69 tmp |= priv->cs_mask; /* start without chip select */
71 tmp &= ~priv->cs_mask; /* chip select low */
72 snd_ice1712_gpio_write(ice, tmp);
76 /* doesn't handle cf=1 yet */
77 tmp &= ~priv->cs_mask;
79 snd_ice1712_gpio_write(ice, tmp);
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--) {
88 tmp &= ~priv->clk_mask;
89 snd_ice1712_gpio_write(ice, tmp);
92 if (addrdata & (1 << idx))
93 tmp |= priv->data_mask;
95 tmp &= ~priv->data_mask;
96 snd_ice1712_gpio_write(ice, tmp);
99 tmp |= priv->clk_mask;
100 snd_ice1712_gpio_write(ice, tmp);
104 if (priv->cs_mask == priv->cs_addr) {
106 /* assert a cs pulse to trigger */
107 tmp &= ~priv->cs_mask;
108 snd_ice1712_gpio_write(ice, tmp);
111 tmp |= priv->cs_mask; /* chip select high to trigger */
113 tmp &= ~priv->cs_mask;
114 tmp |= priv->cs_none; /* deselect address */
116 snd_ice1712_gpio_write(ice, tmp);
121 * initialize the struct snd_akm4xxx record with the template
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)
126 struct snd_ak4xxx_private *priv;
129 priv = kmalloc(sizeof(*priv), GFP_KERNEL);
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);
150 void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice)
153 if (ice->akm == NULL)
155 for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
156 struct snd_akm4xxx *ak = &ice->akm[akidx];
157 kfree((void*)ak->private_value[0]);
163 * build AK4xxx controls
165 int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice)
170 for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
171 struct snd_akm4xxx *ak = &ice->akm[akidx];
172 err = snd_akm4xxx_build_controls(ak);
179 static int __init alsa_ice1712_akm4xxx_module_init(void)
184 static void __exit alsa_ice1712_akm4xxx_module_exit(void)
188 module_init(alsa_ice1712_akm4xxx_module_init)
189 module_exit(alsa_ice1712_akm4xxx_module_exit)
191 EXPORT_SYMBOL(snd_ice1712_akm4xxx_init);
192 EXPORT_SYMBOL(snd_ice1712_akm4xxx_free);
193 EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls);