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