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/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
snd_ice1712_akm4xxx_lock(struct snd_akm4xxx * ak,int chip)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
snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx * ak,int chip)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 */
snd_ice1712_akm4xxx_write(struct snd_akm4xxx * ak,int chip,unsigned char addr,unsigned char data)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 */
snd_ice1712_akm4xxx_init(struct snd_akm4xxx * ak,const struct snd_akm4xxx * temp,const struct snd_ak4xxx_private * _priv,struct snd_ice1712 * ice)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
snd_ice1712_akm4xxx_free(struct snd_ice1712 * ice)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 */
snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 * ice)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
alsa_ice1712_akm4xxx_module_init(void)182 static int __init alsa_ice1712_akm4xxx_module_init(void)
183 {
184 return 0;
185 }
186
alsa_ice1712_akm4xxx_module_exit(void)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);
197