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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * ALSA driver for ICEnsemble ICE1712 (Envy24)
3 *
4 * AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface
5 *
6 * Copyright (c) 2000 Jaroslav Kysela <perex@suse.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 <sound/driver.h>
25#include <asm/io.h>
26#include <linux/delay.h>
27#include <linux/interrupt.h>
28#include <linux/init.h>
29#include <sound/core.h>
30#include <sound/initval.h>
31#include "ice1712.h"
32
33MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
34MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
35MODULE_LICENSE("GPL");
36
37static void snd_ice1712_akm4xxx_lock(akm4xxx_t *ak, int chip)
38{
39 ice1712_t *ice = ak->private_data[0];
40
41 snd_ice1712_save_gpio_status(ice);
42}
43
44static void snd_ice1712_akm4xxx_unlock(akm4xxx_t *ak, int chip)
45{
46 ice1712_t *ice = ak->private_data[0];
47
48 snd_ice1712_restore_gpio_status(ice);
49}
50
51/*
52 * write AK4xxx register
53 */
54static void snd_ice1712_akm4xxx_write(akm4xxx_t *ak, int chip,
55 unsigned char addr, unsigned char data)
56{
57 unsigned int tmp;
58 int idx;
59 unsigned int addrdata;
60 struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
61 ice1712_t *ice = ak->private_data[0];
62
63 snd_assert(chip >= 0 && chip < 4, return);
64
65 tmp = snd_ice1712_gpio_read(ice);
66 tmp |= priv->add_flags;
67 tmp &= ~priv->mask_flags;
68 if (priv->cs_mask == priv->cs_addr) {
69 if (priv->cif) {
70 tmp |= priv->cs_mask; /* start without chip select */
71 } else {
72 tmp &= ~priv->cs_mask; /* chip select low */
73 snd_ice1712_gpio_write(ice, tmp);
74 udelay(1);
75 }
76 } else {
77 /* doesn't handle cf=1 yet */
78 tmp &= ~priv->cs_mask;
79 tmp |= priv->cs_addr;
80 snd_ice1712_gpio_write(ice, tmp);
81 udelay(1);
82 }
83
84 /* build I2C address + data byte */
85 addrdata = (priv->caddr << 6) | 0x20 | (addr & 0x1f);
86 addrdata = (addrdata << 8) | data;
87 for (idx = 15; idx >= 0; idx--) {
88 /* drop clock */
89 tmp &= ~priv->clk_mask;
90 snd_ice1712_gpio_write(ice, tmp);
91 udelay(1);
92 /* set data */
93 if (addrdata & (1 << idx))
94 tmp |= priv->data_mask;
95 else
96 tmp &= ~priv->data_mask;
97 snd_ice1712_gpio_write(ice, tmp);
98 udelay(1);
99 /* raise clock */
100 tmp |= priv->clk_mask;
101 snd_ice1712_gpio_write(ice, tmp);
102 udelay(1);
103 }
104
105 if (priv->cs_mask == priv->cs_addr) {
106 if (priv->cif) {
107 /* assert a cs pulse to trigger */
108 tmp &= ~priv->cs_mask;
109 snd_ice1712_gpio_write(ice, tmp);
110 udelay(1);
111 }
112 tmp |= priv->cs_mask; /* chip select high to trigger */
113 } else {
114 tmp &= ~priv->cs_mask;
115 tmp |= priv->cs_none; /* deselect address */
116 }
117 snd_ice1712_gpio_write(ice, tmp);
118 udelay(1);
119}
120
121/*
122 * initialize the akm4xxx_t record with the template
123 */
124int snd_ice1712_akm4xxx_init(akm4xxx_t *ak, const akm4xxx_t *temp,
125 const struct snd_ak4xxx_private *_priv, ice1712_t *ice)
126{
127 struct snd_ak4xxx_private *priv;
128
129 if (_priv != NULL) {
130 priv = kmalloc(sizeof(*priv), GFP_KERNEL);
131 if (priv == NULL)
132 return -ENOMEM;
133 *priv = *_priv;
134 } else {
135 priv = NULL;
136 }
137 *ak = *temp;
138 ak->card = ice->card;
139 ak->private_value[0] = (unsigned long)priv;
140 ak->private_data[0] = ice;
141 if (ak->ops.lock == NULL)
142 ak->ops.lock = snd_ice1712_akm4xxx_lock;
143 if (ak->ops.unlock == NULL)
144 ak->ops.unlock = snd_ice1712_akm4xxx_unlock;
145 if (ak->ops.write == NULL)
146 ak->ops.write = snd_ice1712_akm4xxx_write;
147 snd_akm4xxx_init(ak);
148 return 0;
149}
150
151void snd_ice1712_akm4xxx_free(ice1712_t *ice)
152{
153 unsigned int akidx;
154 if (ice->akm == NULL)
155 return;
156 for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
157 akm4xxx_t *ak = &ice->akm[akidx];
158 kfree((void*)ak->private_value[0]);
159 }
160 kfree(ice->akm);
161}
162
163/*
164 * build AK4xxx controls
165 */
166int snd_ice1712_akm4xxx_build_controls(ice1712_t *ice)
167{
168 unsigned int akidx;
169 int err;
170
171 for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
172 akm4xxx_t *ak = &ice->akm[akidx];
173 err = snd_akm4xxx_build_controls(ak);
174 if (err < 0)
175 return err;
176 }
177 return 0;
178}
179
180static int __init alsa_ice1712_akm4xxx_module_init(void)
181{
182 return 0;
183}
184
185static void __exit alsa_ice1712_akm4xxx_module_exit(void)
186{
187}
188
189module_init(alsa_ice1712_akm4xxx_module_init)
190module_exit(alsa_ice1712_akm4xxx_module_exit)
191
192EXPORT_SYMBOL(snd_ice1712_akm4xxx_init);
193EXPORT_SYMBOL(snd_ice1712_akm4xxx_free);
194EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls);