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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [sound/] [ics2101.c] - Rev 1626
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/* * sound/ics2101.c * * Driver for the ICS2101 mixer of GUS v3.7. */ /* * Copyright (C) by Hannu Savolainen 1993-1996 * * USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL) * Version 2 (June 1991). See the "COPYING" file distributed with this software * for more info. */ #include <linux/config.h> #include "sound_config.h" #if defined(CONFIG_GUS) #include <linux/ultrasound.h> #include "gus_hw.h" #define MIX_DEVS (SOUND_MASK_MIC|SOUND_MASK_LINE| \ SOUND_MASK_SYNTH| \ SOUND_MASK_CD | SOUND_MASK_VOLUME) extern int *gus_osp; extern int gus_base; static int volumes[ICS_MIXDEVS]; static int left_fix[ICS_MIXDEVS] = {1, 1, 1, 2, 1, 2}; static int right_fix[ICS_MIXDEVS] = {2, 2, 2, 1, 2, 1}; static int scale_vol (int vol) { /* * Experimental volume scaling by Risto Kankkunen. * This should give smoother volume response than just * a plain multiplication. */ int e; if (vol < 0) vol = 0; if (vol > 100) vol = 100; vol = (31 * vol + 50) / 100; e = 0; if (vol) { while (vol < 16) { vol <<= 1; e--; } vol -= 16; e += 7; } return ((e << 4) + vol); } static void write_mix (int dev, int chn, int vol) { int *selector; unsigned long flags; int ctrl_addr = dev << 3; int attn_addr = dev << 3; vol = scale_vol (vol); if (chn == CHN_LEFT) { selector = left_fix; ctrl_addr |= 0x00; attn_addr |= 0x02; } else { selector = right_fix; ctrl_addr |= 0x01; attn_addr |= 0x03; } save_flags (flags); cli (); outb (ctrl_addr, u_MixSelect); outb (selector[dev], u_MixData); outb (attn_addr, u_MixSelect); outb ((unsigned char) vol, u_MixData); restore_flags (flags); } static int set_volumes (int dev, int vol) { int left = vol & 0x00ff; int right = (vol >> 8) & 0x00ff; if (left < 0) left = 0; if (left > 100) left = 100; if (right < 0) right = 0; if (right > 100) right = 100; write_mix (dev, CHN_LEFT, left); write_mix (dev, CHN_RIGHT, right); vol = left + (right << 8); volumes[dev] = vol; return vol; } static int ics2101_mixer_ioctl (int dev, unsigned int cmd, caddr_t arg) { if (((cmd >> 8) & 0xff) == 'M') { if (_IOC_DIR (cmd) & _IOC_WRITE) switch (cmd & 0xff) { case SOUND_MIXER_RECSRC: return gus_default_mixer_ioctl (dev, cmd, arg); break; case SOUND_MIXER_MIC: return snd_ioctl_return ((int *) arg, set_volumes (DEV_MIC, get_user ((int *) arg))); break; case SOUND_MIXER_CD: return snd_ioctl_return ((int *) arg, set_volumes (DEV_CD, get_user ((int *) arg))); break; case SOUND_MIXER_LINE: return snd_ioctl_return ((int *) arg, set_volumes (DEV_LINE, get_user ((int *) arg))); break; case SOUND_MIXER_SYNTH: return snd_ioctl_return ((int *) arg, set_volumes (DEV_GF1, get_user ((int *) arg))); break; case SOUND_MIXER_VOLUME: return snd_ioctl_return ((int *) arg, set_volumes (DEV_VOL, get_user ((int *) arg))); break; default: return -(EINVAL); } else switch (cmd & 0xff) /* * Return parameters */ { case SOUND_MIXER_RECSRC: return gus_default_mixer_ioctl (dev, cmd, arg); break; case SOUND_MIXER_DEVMASK: return snd_ioctl_return ((int *) arg, MIX_DEVS); break; case SOUND_MIXER_STEREODEVS: return snd_ioctl_return ((int *) arg, SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_SYNTH | SOUND_MASK_VOLUME | SOUND_MASK_MIC); break; case SOUND_MIXER_RECMASK: return snd_ioctl_return ((int *) arg, SOUND_MASK_MIC | SOUND_MASK_LINE); break; case SOUND_MIXER_CAPS: return snd_ioctl_return ((int *) arg, 0); break; case SOUND_MIXER_MIC: return snd_ioctl_return ((int *) arg, volumes[DEV_MIC]); break; case SOUND_MIXER_LINE: return snd_ioctl_return ((int *) arg, volumes[DEV_LINE]); break; case SOUND_MIXER_CD: return snd_ioctl_return ((int *) arg, volumes[DEV_CD]); break; case SOUND_MIXER_VOLUME: return snd_ioctl_return ((int *) arg, volumes[DEV_VOL]); break; case SOUND_MIXER_SYNTH: return snd_ioctl_return ((int *) arg, volumes[DEV_GF1]); break; default: return -(EINVAL); } } return -(EINVAL); } static struct mixer_operations ics2101_mixer_operations = { "ICS2101", "ICS2101 Multimedia Mixer", ics2101_mixer_ioctl }; void ics2101_mixer_init (void) { int i; if (num_mixers < MAX_MIXER_DEV) { mixer_devs[num_mixers++] = &ics2101_mixer_operations; /* * Some GUS v3.7 cards had some channels flipped. Disable * the flipping feature if the model id is other than 5. */ if (inb (u_MixSelect) != 5) { for (i = 0; i < ICS_MIXDEVS; i++) left_fix[i] = 1; for (i = 0; i < ICS_MIXDEVS; i++) right_fix[i] = 2; } set_volumes (DEV_GF1, 0x5a5a); set_volumes (DEV_CD, 0x5a5a); set_volumes (DEV_MIC, 0x0000); set_volumes (DEV_LINE, 0x5a5a); set_volumes (DEV_VOL, 0x5a5a); set_volumes (DEV_UNUSED, 0x0000); } } #endif
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