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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> | |
27 | #include <linux/init.h> | |
28 | #include <sound/core.h> | |
29 | #include <sound/initval.h> | |
30 | #include "ice1712.h" | |
31 | ||
c1017a4c | 32 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
33 | MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface"); |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
6ca308d4 | 36 | static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip) |
1da177e4 | 37 | { |
6ca308d4 | 38 | struct snd_ice1712 *ice = ak->private_data[0]; |
1da177e4 LT |
39 | |
40 | snd_ice1712_save_gpio_status(ice); | |
41 | } | |
42 | ||
6ca308d4 | 43 | static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip) |
1da177e4 | 44 | { |
6ca308d4 | 45 | struct snd_ice1712 *ice = ak->private_data[0]; |
1da177e4 LT |
46 | |
47 | snd_ice1712_restore_gpio_status(ice); | |
48 | } | |
49 | ||
50 | /* | |
51 | * write AK4xxx register | |
52 | */ | |
6ca308d4 | 53 | static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip, |
1da177e4 LT |
54 | unsigned char addr, unsigned char data) |
55 | { | |
56 | unsigned int tmp; | |
57 | int idx; | |
58 | unsigned int addrdata; | |
59 | struct snd_ak4xxx_private *priv = (void *)ak->private_value[0]; | |
6ca308d4 | 60 | struct snd_ice1712 *ice = ak->private_data[0]; |
1da177e4 | 61 | |
da3cec35 TI |
62 | if (snd_BUG_ON(chip < 0 || chip >= 4)) |
63 | return; | |
1da177e4 LT |
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 | /* | |
6ca308d4 | 122 | * initialize the struct snd_akm4xxx record with the template |
1da177e4 | 123 | */ |
6ca308d4 TI |
124 | int snd_ice1712_akm4xxx_init(struct snd_akm4xxx *ak, const struct snd_akm4xxx *temp, |
125 | const struct snd_ak4xxx_private *_priv, struct snd_ice1712 *ice) | |
1da177e4 LT |
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 | ||
6ca308d4 | 151 | void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice) |
1da177e4 LT |
152 | { |
153 | unsigned int akidx; | |
154 | if (ice->akm == NULL) | |
155 | return; | |
156 | for (akidx = 0; akidx < ice->akm_codecs; akidx++) { | |
6ca308d4 | 157 | struct snd_akm4xxx *ak = &ice->akm[akidx]; |
1da177e4 LT |
158 | kfree((void*)ak->private_value[0]); |
159 | } | |
160 | kfree(ice->akm); | |
161 | } | |
162 | ||
163 | /* | |
164 | * build AK4xxx controls | |
165 | */ | |
6ca308d4 | 166 | int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice) |
1da177e4 LT |
167 | { |
168 | unsigned int akidx; | |
169 | int err; | |
170 | ||
171 | for (akidx = 0; akidx < ice->akm_codecs; akidx++) { | |
6ca308d4 | 172 | struct snd_akm4xxx *ak = &ice->akm[akidx]; |
1da177e4 LT |
173 | err = snd_akm4xxx_build_controls(ak); |
174 | if (err < 0) | |
175 | return err; | |
176 | } | |
177 | return 0; | |
178 | } | |
179 | ||
180 | static int __init alsa_ice1712_akm4xxx_module_init(void) | |
181 | { | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static void __exit alsa_ice1712_akm4xxx_module_exit(void) | |
186 | { | |
187 | } | |
188 | ||
189 | module_init(alsa_ice1712_akm4xxx_module_init) | |
190 | module_exit(alsa_ice1712_akm4xxx_module_exit) | |
191 | ||
192 | EXPORT_SYMBOL(snd_ice1712_akm4xxx_init); | |
193 | EXPORT_SYMBOL(snd_ice1712_akm4xxx_free); | |
194 | EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls); |