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-rw-r--r--sound/oss/ics2101.c247
1 files changed, 247 insertions, 0 deletions
diff --git a/sound/oss/ics2101.c b/sound/oss/ics2101.c
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+++ b/sound/oss/ics2101.c
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1/*
2 * sound/ics2101.c
3 *
4 * Driver for the ICS2101 mixer of GUS v3.7.
5 *
6 *
7 * Copyright (C) by Hannu Savolainen 1993-1997
8 *
9 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
10 * Version 2 (June 1991). See the "COPYING" file distributed with this software
11 * for more info.
12 *
13 *
14 * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
15 * Bartlomiej Zolnierkiewicz : added __init to ics2101_mixer_init()
16 */
17#include <linux/init.h>
18#include <linux/spinlock.h>
19#include "sound_config.h"
20
21#include <linux/ultrasound.h>
22
23#include "gus.h"
24#include "gus_hw.h"
25
26#define MIX_DEVS (SOUND_MASK_MIC|SOUND_MASK_LINE| \
27 SOUND_MASK_SYNTH| \
28 SOUND_MASK_CD | SOUND_MASK_VOLUME)
29
30extern int *gus_osp;
31extern int gus_base;
32extern spinlock_t gus_lock;
33static int volumes[ICS_MIXDEVS];
34static int left_fix[ICS_MIXDEVS] =
35{1, 1, 1, 2, 1, 2};
36static int right_fix[ICS_MIXDEVS] =
37{2, 2, 2, 1, 2, 1};
38
39static int scale_vol(int vol)
40{
41 /*
42 * Experimental volume scaling by Risto Kankkunen.
43 * This should give smoother volume response than just
44 * a plain multiplication.
45 */
46
47 int e;
48
49 if (vol < 0)
50 vol = 0;
51 if (vol > 100)
52 vol = 100;
53 vol = (31 * vol + 50) / 100;
54 e = 0;
55 if (vol)
56 {
57 while (vol < 16)
58 {
59 vol <<= 1;
60 e--;
61 }
62 vol -= 16;
63 e += 7;
64 }
65 return ((e << 4) + vol);
66}
67
68static void write_mix(int dev, int chn, int vol)
69{
70 int *selector;
71 unsigned long flags;
72 int ctrl_addr = dev << 3;
73 int attn_addr = dev << 3;
74
75 vol = scale_vol(vol);
76
77 if (chn == CHN_LEFT)
78 {
79 selector = left_fix;
80 ctrl_addr |= 0x00;
81 attn_addr |= 0x02;
82 }
83 else
84 {
85 selector = right_fix;
86 ctrl_addr |= 0x01;
87 attn_addr |= 0x03;
88 }
89
90 spin_lock_irqsave(&gus_lock, flags);
91 outb((ctrl_addr), u_MixSelect);
92 outb((selector[dev]), u_MixData);
93 outb((attn_addr), u_MixSelect);
94 outb(((unsigned char) vol), u_MixData);
95 spin_unlock_irqrestore(&gus_lock,flags);
96}
97
98static int set_volumes(int dev, int vol)
99{
100 int left = vol & 0x00ff;
101 int right = (vol >> 8) & 0x00ff;
102
103 if (left < 0)
104 left = 0;
105 if (left > 100)
106 left = 100;
107 if (right < 0)
108 right = 0;
109 if (right > 100)
110 right = 100;
111
112 write_mix(dev, CHN_LEFT, left);
113 write_mix(dev, CHN_RIGHT, right);
114
115 vol = left + (right << 8);
116 volumes[dev] = vol;
117 return vol;
118}
119
120static int ics2101_mixer_ioctl(int dev, unsigned int cmd, void __user *arg)
121{
122 int val;
123
124 if (((cmd >> 8) & 0xff) == 'M') {
125 if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
126
127 if (get_user(val, (int __user *)arg))
128 return -EFAULT;
129 switch (cmd & 0xff) {
130 case SOUND_MIXER_RECSRC:
131 return gus_default_mixer_ioctl(dev, cmd, arg);
132
133 case SOUND_MIXER_MIC:
134 val = set_volumes(DEV_MIC, val);
135 break;
136
137 case SOUND_MIXER_CD:
138 val = set_volumes(DEV_CD, val);
139 break;
140
141 case SOUND_MIXER_LINE:
142 val = set_volumes(DEV_LINE, val);
143 break;
144
145 case SOUND_MIXER_SYNTH:
146 val = set_volumes(DEV_GF1, val);
147 break;
148
149 case SOUND_MIXER_VOLUME:
150 val = set_volumes(DEV_VOL, val);
151 break;
152
153 default:
154 return -EINVAL;
155 }
156 return put_user(val, (int __user *)arg);
157 } else {
158 switch (cmd & 0xff) {
159 /*
160 * Return parameters
161 */
162 case SOUND_MIXER_RECSRC:
163 return gus_default_mixer_ioctl(dev, cmd, arg);
164
165 case SOUND_MIXER_DEVMASK:
166 val = MIX_DEVS;
167 break;
168
169 case SOUND_MIXER_STEREODEVS:
170 val = SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_SYNTH | SOUND_MASK_VOLUME | SOUND_MASK_MIC;
171 break;
172
173 case SOUND_MIXER_RECMASK:
174 val = SOUND_MASK_MIC | SOUND_MASK_LINE;
175 break;
176
177 case SOUND_MIXER_CAPS:
178 val = 0;
179 break;
180
181 case SOUND_MIXER_MIC:
182 val = volumes[DEV_MIC];
183 break;
184
185 case SOUND_MIXER_LINE:
186 val = volumes[DEV_LINE];
187 break;
188
189 case SOUND_MIXER_CD:
190 val = volumes[DEV_CD];
191 break;
192
193 case SOUND_MIXER_VOLUME:
194 val = volumes[DEV_VOL];
195 break;
196
197 case SOUND_MIXER_SYNTH:
198 val = volumes[DEV_GF1];
199 break;
200
201 default:
202 return -EINVAL;
203 }
204 return put_user(val, (int __user *)arg);
205 }
206 }
207 return -EINVAL;
208}
209
210static struct mixer_operations ics2101_mixer_operations =
211{
212 .owner = THIS_MODULE,
213 .id = "ICS2101",
214 .name = "ICS2101 Multimedia Mixer",
215 .ioctl = ics2101_mixer_ioctl
216};
217
218int __init ics2101_mixer_init(void)
219{
220 int i;
221 int n;
222
223 if ((n = sound_alloc_mixerdev()) != -1)
224 {
225 mixer_devs[n] = &ics2101_mixer_operations;
226
227 /*
228 * Some GUS v3.7 cards had some channels flipped. Disable
229 * the flipping feature if the model id is other than 5.
230 */
231
232 if (inb(u_MixSelect) != 5)
233 {
234 for (i = 0; i < ICS_MIXDEVS; i++)
235 left_fix[i] = 1;
236 for (i = 0; i < ICS_MIXDEVS; i++)
237 right_fix[i] = 2;
238 }
239 set_volumes(DEV_GF1, 0x5a5a);
240 set_volumes(DEV_CD, 0x5a5a);
241 set_volumes(DEV_MIC, 0x0000);
242 set_volumes(DEV_LINE, 0x5a5a);
243 set_volumes(DEV_VOL, 0x5a5a);
244 set_volumes(DEV_UNUSED, 0x0000);
245 }
246 return n;
247}
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