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1da177e4 LT |
1 | /* |
2 | * ALSA driver for ICEnsemble ICE1712 (Envy24) | |
3 | * | |
4 | * AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface | |
5 | * | |
c1017a4c | 6 | * Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 LT |
24 | #include <asm/io.h> |
25 | #include <linux/delay.h> | |
26 | #include <linux/interrupt.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 LT |
28 | #include <linux/init.h> |
29 | #include <sound/core.h> | |
30 | #include <sound/initval.h> | |
31 | #include "ice1712.h" | |
32 | ||
c1017a4c | 33 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
34 | MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface"); |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
6ca308d4 | 37 | static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip) |
1da177e4 | 38 | { |
6ca308d4 | 39 | struct snd_ice1712 *ice = ak->private_data[0]; |
1da177e4 LT |
40 | |
41 | snd_ice1712_save_gpio_status(ice); | |
42 | } | |
43 | ||
6ca308d4 | 44 | static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip) |
1da177e4 | 45 | { |
6ca308d4 | 46 | struct snd_ice1712 *ice = ak->private_data[0]; |
1da177e4 LT |
47 | |
48 | snd_ice1712_restore_gpio_status(ice); | |
49 | } | |
50 | ||
51 | /* | |
52 | * write AK4xxx register | |
53 | */ | |
6ca308d4 | 54 | static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip, |
1da177e4 LT |
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]; | |
6ca308d4 | 61 | struct snd_ice1712 *ice = ak->private_data[0]; |
1da177e4 | 62 | |
da3cec35 TI |
63 | if (snd_BUG_ON(chip < 0 || chip >= 4)) |
64 | return; | |
1da177e4 LT |
65 | |
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) { | |
70 | if (priv->cif) { | |
71 | tmp |= priv->cs_mask; /* start without chip select */ | |
72 | } else { | |
73 | tmp &= ~priv->cs_mask; /* chip select low */ | |
74 | snd_ice1712_gpio_write(ice, tmp); | |
75 | udelay(1); | |
76 | } | |
77 | } else { | |
78 | /* doesn't handle cf=1 yet */ | |
79 | tmp &= ~priv->cs_mask; | |
80 | tmp |= priv->cs_addr; | |
81 | snd_ice1712_gpio_write(ice, tmp); | |
82 | udelay(1); | |
83 | } | |
84 | ||
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--) { | |
89 | /* drop clock */ | |
90 | tmp &= ~priv->clk_mask; | |
91 | snd_ice1712_gpio_write(ice, tmp); | |
92 | udelay(1); | |
93 | /* set data */ | |
94 | if (addrdata & (1 << idx)) | |
95 | tmp |= priv->data_mask; | |
96 | else | |
97 | tmp &= ~priv->data_mask; | |
98 | snd_ice1712_gpio_write(ice, tmp); | |
99 | udelay(1); | |
100 | /* raise clock */ | |
101 | tmp |= priv->clk_mask; | |
102 | snd_ice1712_gpio_write(ice, tmp); | |
103 | udelay(1); | |
104 | } | |
105 | ||
106 | if (priv->cs_mask == priv->cs_addr) { | |
107 | if (priv->cif) { | |
108 | /* assert a cs pulse to trigger */ | |
109 | tmp &= ~priv->cs_mask; | |
110 | snd_ice1712_gpio_write(ice, tmp); | |
111 | udelay(1); | |
112 | } | |
113 | tmp |= priv->cs_mask; /* chip select high to trigger */ | |
114 | } else { | |
115 | tmp &= ~priv->cs_mask; | |
116 | tmp |= priv->cs_none; /* deselect address */ | |
117 | } | |
118 | snd_ice1712_gpio_write(ice, tmp); | |
119 | udelay(1); | |
120 | } | |
121 | ||
122 | /* | |
6ca308d4 | 123 | * initialize the struct snd_akm4xxx record with the template |
1da177e4 | 124 | */ |
6ca308d4 TI |
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) | |
1da177e4 LT |
127 | { |
128 | struct snd_ak4xxx_private *priv; | |
129 | ||
130 | if (_priv != NULL) { | |
131 | priv = kmalloc(sizeof(*priv), GFP_KERNEL); | |
132 | if (priv == NULL) | |
133 | return -ENOMEM; | |
134 | *priv = *_priv; | |
135 | } else { | |
136 | priv = NULL; | |
137 | } | |
138 | *ak = *temp; | |
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); | |
149 | return 0; | |
150 | } | |
151 | ||
6ca308d4 | 152 | void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice) |
1da177e4 LT |
153 | { |
154 | unsigned int akidx; | |
155 | if (ice->akm == NULL) | |
156 | return; | |
157 | for (akidx = 0; akidx < ice->akm_codecs; akidx++) { | |
6ca308d4 | 158 | struct snd_akm4xxx *ak = &ice->akm[akidx]; |
1da177e4 LT |
159 | kfree((void*)ak->private_value[0]); |
160 | } | |
161 | kfree(ice->akm); | |
162 | } | |
163 | ||
164 | /* | |
165 | * build AK4xxx controls | |
166 | */ | |
6ca308d4 | 167 | int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice) |
1da177e4 LT |
168 | { |
169 | unsigned int akidx; | |
170 | int err; | |
171 | ||
172 | for (akidx = 0; akidx < ice->akm_codecs; akidx++) { | |
6ca308d4 | 173 | struct snd_akm4xxx *ak = &ice->akm[akidx]; |
1da177e4 LT |
174 | err = snd_akm4xxx_build_controls(ak); |
175 | if (err < 0) | |
176 | return err; | |
177 | } | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static int __init alsa_ice1712_akm4xxx_module_init(void) | |
182 | { | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static void __exit alsa_ice1712_akm4xxx_module_exit(void) | |
187 | { | |
188 | } | |
189 | ||
190 | module_init(alsa_ice1712_akm4xxx_module_init) | |
191 | module_exit(alsa_ice1712_akm4xxx_module_exit) | |
192 | ||
193 | EXPORT_SYMBOL(snd_ice1712_akm4xxx_init); | |
194 | EXPORT_SYMBOL(snd_ice1712_akm4xxx_free); | |
195 | EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls); |