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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 | 28 | #include <linux/init.h> |
da155d5b | 29 | #include <linux/module.h> |
1da177e4 LT |
30 | #include <sound/core.h> |
31 | #include <sound/initval.h> | |
32 | #include "ice1712.h" | |
33 | ||
c1017a4c | 34 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
35 | MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface"); |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
6ca308d4 | 38 | static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip) |
1da177e4 | 39 | { |
6ca308d4 | 40 | struct snd_ice1712 *ice = ak->private_data[0]; |
1da177e4 LT |
41 | |
42 | snd_ice1712_save_gpio_status(ice); | |
43 | } | |
44 | ||
6ca308d4 | 45 | static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip) |
1da177e4 | 46 | { |
6ca308d4 | 47 | struct snd_ice1712 *ice = ak->private_data[0]; |
1da177e4 LT |
48 | |
49 | snd_ice1712_restore_gpio_status(ice); | |
50 | } | |
51 | ||
52 | /* | |
53 | * write AK4xxx register | |
54 | */ | |
6ca308d4 | 55 | static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip, |
1da177e4 LT |
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]; | |
6ca308d4 | 62 | struct snd_ice1712 *ice = ak->private_data[0]; |
1da177e4 | 63 | |
da3cec35 TI |
64 | if (snd_BUG_ON(chip < 0 || chip >= 4)) |
65 | return; | |
1da177e4 LT |
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 | /* | |
6ca308d4 | 124 | * initialize the struct snd_akm4xxx record with the template |
1da177e4 | 125 | */ |
6ca308d4 TI |
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) | |
1da177e4 LT |
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 | ||
6ca308d4 | 153 | void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice) |
1da177e4 LT |
154 | { |
155 | unsigned int akidx; | |
156 | if (ice->akm == NULL) | |
157 | return; | |
158 | for (akidx = 0; akidx < ice->akm_codecs; akidx++) { | |
6ca308d4 | 159 | struct snd_akm4xxx *ak = &ice->akm[akidx]; |
1da177e4 LT |
160 | kfree((void*)ak->private_value[0]); |
161 | } | |
162 | kfree(ice->akm); | |
163 | } | |
164 | ||
165 | /* | |
166 | * build AK4xxx controls | |
167 | */ | |
6ca308d4 | 168 | int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice) |
1da177e4 LT |
169 | { |
170 | unsigned int akidx; | |
171 | int err; | |
172 | ||
173 | for (akidx = 0; akidx < ice->akm_codecs; akidx++) { | |
6ca308d4 | 174 | struct snd_akm4xxx *ak = &ice->akm[akidx]; |
1da177e4 LT |
175 | err = snd_akm4xxx_build_controls(ak); |
176 | if (err < 0) | |
177 | return err; | |
178 | } | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static int __init alsa_ice1712_akm4xxx_module_init(void) | |
183 | { | |
184 | return 0; | |
185 | } | |
186 | ||
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); |