ac97_codec.c
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上传日期:2013-02-24
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- /*
- * ac97_codec.c: Generic AC97 mixer/modem module
- *
- * Derived from ac97 mixer in maestro and trident driver.
- *
- * Copyright 2000 Silicon Integrated System Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- **************************************************************************
- *
- * The Intel Audio Codec '97 specification is available at the Intel
- * audio homepage: http://developer.intel.com/ial/scalableplatforms/audio/
- *
- * The specification itself is currently available at:
- * ftp://download.intel.com/ial/scalableplatforms/ac97r22.pdf
- *
- **************************************************************************
- *
- * History
- * v0.4 Mar 15 2000 Ollie Lho
- * dual codecs support verified with 4 channels output
- * v0.3 Feb 22 2000 Ollie Lho
- * bug fix for record mask setting
- * v0.2 Feb 10 2000 Ollie Lho
- * add ac97_read_proc for /proc/driver/{vendor}/ac97
- * v0.1 Jan 14 2000 Ollie Lho <ollie@sis.com.tw>
- * Isolated from trident.c to support multiple ac97 codec
- */
- #include <linux/module.h>
- #include <linux/version.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/errno.h>
- #include <linux/bitops.h>
- #include <linux/delay.h>
- #include <linux/ac97_codec.h>
- #include <asm/uaccess.h>
- static int ac97_read_mixer(struct ac97_codec *codec, int oss_channel);
- static void ac97_write_mixer(struct ac97_codec *codec, int oss_channel,
- unsigned int left, unsigned int right);
- static void ac97_set_mixer(struct ac97_codec *codec, unsigned int oss_mixer, unsigned int val );
- static int ac97_recmask_io(struct ac97_codec *codec, int rw, int mask);
- static int ac97_mixer_ioctl(struct ac97_codec *codec, unsigned int cmd, unsigned long arg);
- static int ac97_init_mixer(struct ac97_codec *codec);
- static int wolfson_init(struct ac97_codec * codec);
- static int tritech_init(struct ac97_codec * codec);
- static int tritech_maestro_init(struct ac97_codec * codec);
- static int sigmatel_9708_init(struct ac97_codec *codec);
- static int sigmatel_9721_init(struct ac97_codec *codec);
- static int sigmatel_9744_init(struct ac97_codec *codec);
- static int eapd_control(struct ac97_codec *codec, int);
- static int crystal_digital_control(struct ac97_codec *codec, int mode);
- /*
- * AC97 operations.
- *
- * If you are adding a codec then you should be able to use
- * eapd_ops - any codec that supports EAPD amp control (most)
- * null_ops - any ancient codec that supports nothing
- *
- * The three functions are
- * init - used for non AC97 standard initialisation
- * amplifier - used to do amplifier control (1=on 0=off)
- * digital - switch to digital modes (0 = analog)
- *
- * Not all codecs support all features, not all drivers use all the
- * operations yet
- */
-
- static struct ac97_ops null_ops = { NULL, NULL, NULL };
- static struct ac97_ops default_ops = { NULL, eapd_control, NULL };
- static struct ac97_ops wolfson_ops = { wolfson_init, NULL, NULL };
- static struct ac97_ops tritech_ops = { tritech_init, NULL, NULL };
- static struct ac97_ops tritech_m_ops = { tritech_maestro_init, NULL, NULL };
- static struct ac97_ops sigmatel_9708_ops = { sigmatel_9708_init, NULL, NULL };
- static struct ac97_ops sigmatel_9721_ops = { sigmatel_9721_init, NULL, NULL };
- static struct ac97_ops sigmatel_9744_ops = { sigmatel_9744_init, NULL, NULL };
- static struct ac97_ops crystal_digital_ops = { NULL, eapd_control, crystal_digital_control };
- /* sorted by vendor/device id */
- static const struct {
- u32 id;
- char *name;
- struct ac97_ops *ops;
- } ac97_codec_ids[] = {
- {0x41445303, "Analog Devices AD1819", &null_ops},
- {0x41445340, "Analog Devices AD1881", &null_ops},
- {0x41445348, "Analog Devices AD1881A", &null_ops},
- {0x41445360, "Analog Devices AD1885", &default_ops},
- {0x41445460, "Analog Devices AD1885", &default_ops},
- {0x414B4D00, "Asahi Kasei AK4540", &null_ops},
- {0x414B4D01, "Asahi Kasei AK4542", &null_ops},
- {0x414B4D02, "Asahi Kasei AK4543", &null_ops},
- {0x414C4710, "ALC200/200P", &null_ops},
- {0x43525900, "Cirrus Logic CS4297", &default_ops},
- {0x43525903, "Cirrus Logic CS4297", &default_ops},
- {0x43525913, "Cirrus Logic CS4297A rev A", &default_ops},
- {0x43525914, "Cirrus Logic CS4297A rev B", &default_ops},
- {0x43525923, "Cirrus Logic CS4298", &null_ops},
- {0x4352592B, "Cirrus Logic CS4294", &null_ops},
- {0x4352592D, "Cirrus Logic CS4294", &null_ops},
- {0x43525931, "Cirrus Logic CS4299 rev A", &crystal_digital_ops},
- {0x43525933, "Cirrus Logic CS4299 rev C", &crystal_digital_ops},
- {0x43525934, "Cirrus Logic CS4299 rev D", &crystal_digital_ops},
- {0x4352594d, "Cirrus Logic CS4201" , &null_ops},
- {0x45838308, "ESS Allegro ES1988", &null_ops},
- {0x49434511, "ICE1232", &null_ops}, /* I hope --jk */
- {0x4e534331, "National Semiconductor LM4549", &null_ops},
- {0x50534304, "Philips UCB1400", &default_ops},
- {0x53494c22, "Silicon Laboratory Si3036", &null_ops},
- {0x53494c23, "Silicon Laboratory Si3038", &null_ops},
- {0x545200FF, "TriTech TR?????", &tritech_m_ops},
- {0x54524102, "TriTech TR28022", &null_ops},
- {0x54524103, "TriTech TR28023", &null_ops},
- {0x54524106, "TriTech TR28026", &null_ops},
- {0x54524108, "TriTech TR28028", &tritech_ops},
- {0x54524123, "TriTech TR A5", &null_ops},
- {0x574D4C00, "Wolfson WM9704", &wolfson_ops},
- {0x574D4C03, "Wolfson WM9703/9704", &wolfson_ops},
- {0x574D4C04, "Wolfson WM9704 (quad)", &wolfson_ops},
- {0x83847600, "SigmaTel STAC????", &null_ops},
- {0x83847604, "SigmaTel STAC9701/3/4/5", &null_ops},
- {0x83847605, "SigmaTel STAC9704", &null_ops},
- {0x83847608, "SigmaTel STAC9708", &sigmatel_9708_ops},
- {0x83847609, "SigmaTel STAC9721/23", &sigmatel_9721_ops},
- {0x83847644, "SigmaTel STAC9744/45", &sigmatel_9744_ops},
- {0x83847656, "SigmaTel STAC9756/57", &sigmatel_9744_ops},
- {0x83847684, "SigmaTel STAC9783/84?", &null_ops},
- {0x57454301, "Winbond 83971D", &null_ops},
- };
- static const char *ac97_stereo_enhancements[] =
- {
- /* 0 */ "No 3D Stereo Enhancement",
- /* 1 */ "Analog Devices Phat Stereo",
- /* 2 */ "Creative Stereo Enhancement",
- /* 3 */ "National Semi 3D Stereo Enhancement",
- /* 4 */ "YAMAHA Ymersion",
- /* 5 */ "BBE 3D Stereo Enhancement",
- /* 6 */ "Crystal Semi 3D Stereo Enhancement",
- /* 7 */ "Qsound QXpander",
- /* 8 */ "Spatializer 3D Stereo Enhancement",
- /* 9 */ "SRS 3D Stereo Enhancement",
- /* 10 */ "Platform Tech 3D Stereo Enhancement",
- /* 11 */ "AKM 3D Audio",
- /* 12 */ "Aureal Stereo Enhancement",
- /* 13 */ "Aztech 3D Enhancement",
- /* 14 */ "Binaura 3D Audio Enhancement",
- /* 15 */ "ESS Technology Stereo Enhancement",
- /* 16 */ "Harman International VMAx",
- /* 17 */ "Nvidea 3D Stereo Enhancement",
- /* 18 */ "Philips Incredible Sound",
- /* 19 */ "Texas Instruments 3D Stereo Enhancement",
- /* 20 */ "VLSI Technology 3D Stereo Enhancement",
- /* 21 */ "TriTech 3D Stereo Enhancement",
- /* 22 */ "Realtek 3D Stereo Enhancement",
- /* 23 */ "Samsung 3D Stereo Enhancement",
- /* 24 */ "Wolfson Microelectronics 3D Enhancement",
- /* 25 */ "Delta Integration 3D Enhancement",
- /* 26 */ "SigmaTel 3D Enhancement",
- /* 27 */ "Winbond 3D Stereo Enhancement",
- /* 28 */ "Rockwell 3D Stereo Enhancement",
- /* 29 */ "Reserved 29",
- /* 30 */ "Reserved 30",
- /* 31 */ "Reserved 31"
- };
- /* this table has default mixer values for all OSS mixers. */
- static struct mixer_defaults {
- int mixer;
- unsigned int value;
- } mixer_defaults[SOUND_MIXER_NRDEVICES] = {
- /* all values 0 -> 100 in bytes */
- {SOUND_MIXER_VOLUME, 0x4343},
- {SOUND_MIXER_BASS, 0x4343},
- {SOUND_MIXER_TREBLE, 0x4343},
- {SOUND_MIXER_PCM, 0x4343},
- {SOUND_MIXER_SPEAKER, 0x4343},
- {SOUND_MIXER_LINE, 0x4343},
- {SOUND_MIXER_MIC, 0x0000},
- {SOUND_MIXER_CD, 0x4343},
- {SOUND_MIXER_ALTPCM, 0x4343},
- {SOUND_MIXER_IGAIN, 0x4343},
- {SOUND_MIXER_LINE1, 0x4343},
- {SOUND_MIXER_PHONEIN, 0x4343},
- {SOUND_MIXER_PHONEOUT, 0x4343},
- {SOUND_MIXER_VIDEO, 0x4343},
- {-1,0}
- };
- /* table to scale scale from OSS mixer value to AC97 mixer register value */
- static struct ac97_mixer_hw {
- unsigned char offset;
- int scale;
- } ac97_hw[SOUND_MIXER_NRDEVICES]= {
- [SOUND_MIXER_VOLUME] = {AC97_MASTER_VOL_STEREO,64},
- [SOUND_MIXER_BASS] = {AC97_MASTER_TONE, 16},
- [SOUND_MIXER_TREBLE] = {AC97_MASTER_TONE, 16},
- [SOUND_MIXER_PCM] = {AC97_PCMOUT_VOL, 32},
- [SOUND_MIXER_SPEAKER] = {AC97_PCBEEP_VOL, 16},
- [SOUND_MIXER_LINE] = {AC97_LINEIN_VOL, 32},
- [SOUND_MIXER_MIC] = {AC97_MIC_VOL, 32},
- [SOUND_MIXER_CD] = {AC97_CD_VOL, 32},
- [SOUND_MIXER_ALTPCM] = {AC97_HEADPHONE_VOL, 64},
- [SOUND_MIXER_IGAIN] = {AC97_RECORD_GAIN, 16},
- [SOUND_MIXER_LINE1] = {AC97_AUX_VOL, 32},
- [SOUND_MIXER_PHONEIN] = {AC97_PHONE_VOL, 32},
- [SOUND_MIXER_PHONEOUT] = {AC97_MASTER_VOL_MONO, 64},
- [SOUND_MIXER_VIDEO] = {AC97_VIDEO_VOL, 32},
- };
- /* the following tables allow us to go from OSS <-> ac97 quickly. */
- enum ac97_recsettings {
- AC97_REC_MIC=0,
- AC97_REC_CD,
- AC97_REC_VIDEO,
- AC97_REC_AUX,
- AC97_REC_LINE,
- AC97_REC_STEREO, /* combination of all enabled outputs.. */
- AC97_REC_MONO, /*.. or the mono equivalent */
- AC97_REC_PHONE
- };
- static const unsigned int ac97_rm2oss[] = {
- [AC97_REC_MIC] = SOUND_MIXER_MIC,
- [AC97_REC_CD] = SOUND_MIXER_CD,
- [AC97_REC_VIDEO] = SOUND_MIXER_VIDEO,
- [AC97_REC_AUX] = SOUND_MIXER_LINE1,
- [AC97_REC_LINE] = SOUND_MIXER_LINE,
- [AC97_REC_STEREO]= SOUND_MIXER_IGAIN,
- [AC97_REC_PHONE] = SOUND_MIXER_PHONEIN
- };
- /* indexed by bit position */
- static const unsigned int ac97_oss_rm[] = {
- [SOUND_MIXER_MIC] = AC97_REC_MIC,
- [SOUND_MIXER_CD] = AC97_REC_CD,
- [SOUND_MIXER_VIDEO] = AC97_REC_VIDEO,
- [SOUND_MIXER_LINE1] = AC97_REC_AUX,
- [SOUND_MIXER_LINE] = AC97_REC_LINE,
- [SOUND_MIXER_IGAIN] = AC97_REC_STEREO,
- [SOUND_MIXER_PHONEIN] = AC97_REC_PHONE
- };
- /* reads the given OSS mixer from the ac97 the caller must have insured that the ac97 knows
- about that given mixer, and should be holding a spinlock for the card */
- static int ac97_read_mixer(struct ac97_codec *codec, int oss_channel)
- {
- u16 val;
- int ret = 0;
- int scale;
- struct ac97_mixer_hw *mh = &ac97_hw[oss_channel];
- val = codec->codec_read(codec , mh->offset);
- if (val & AC97_MUTE) {
- ret = 0;
- } else if (AC97_STEREO_MASK & (1 << oss_channel)) {
- /* nice stereo mixers .. */
- int left,right;
- left = (val >> 8) & 0x7f;
- right = val & 0x7f;
- if (oss_channel == SOUND_MIXER_IGAIN) {
- right = (right * 100) / mh->scale;
- left = (left * 100) / mh->scale;
- } else {
- /* these may have 5 or 6 bit resolution */
- if(oss_channel == SOUND_MIXER_VOLUME || oss_channel == SOUND_MIXER_ALTPCM)
- scale = (1 << codec->bit_resolution);
- else
- scale = mh->scale;
- right = 100 - ((right * 100) / scale);
- left = 100 - ((left * 100) / scale);
- }
- ret = left | (right << 8);
- } else if (oss_channel == SOUND_MIXER_SPEAKER) {
- ret = 100 - ((((val & 0x1e)>>1) * 100) / mh->scale);
- } else if (oss_channel == SOUND_MIXER_PHONEIN) {
- ret = 100 - (((val & 0x1f) * 100) / mh->scale);
- } else if (oss_channel == SOUND_MIXER_PHONEOUT) {
- scale = (1 << codec->bit_resolution);
- ret = 100 - (((val & 0x1f) * 100) / scale);
- } else if (oss_channel == SOUND_MIXER_MIC) {
- ret = 100 - (((val & 0x1f) * 100) / mh->scale);
- /* the low bit is optional in the tone sliders and masking
- it lets us avoid the 0xf 'bypass'.. */
- } else if (oss_channel == SOUND_MIXER_BASS) {
- ret = 100 - ((((val >> 8) & 0xe) * 100) / mh->scale);
- } else if (oss_channel == SOUND_MIXER_TREBLE) {
- ret = 100 - (((val & 0xe) * 100) / mh->scale);
- }
- #ifdef DEBUG
- printk("ac97_codec: read OSS mixer %2d (%s ac97 register 0x%02x), "
- "0x%04x -> 0x%04xn",
- oss_channel, codec->id ? "Secondary" : "Primary",
- mh->offset, val, ret);
- #endif
- return ret;
- }
- /* write the OSS encoded volume to the given OSS encoded mixer, again caller's job to
- make sure all is well in arg land, call with spinlock held */
- static void ac97_write_mixer(struct ac97_codec *codec, int oss_channel,
- unsigned int left, unsigned int right)
- {
- u16 val = 0;
- int scale;
- struct ac97_mixer_hw *mh = &ac97_hw[oss_channel];
- #ifdef DEBUG
- printk("ac97_codec: wrote OSS mixer %2d (%s ac97 register 0x%02x), "
- "left vol:%2d, right vol:%2d:",
- oss_channel, codec->id ? "Secondary" : "Primary",
- mh->offset, left, right);
- #endif
- if (AC97_STEREO_MASK & (1 << oss_channel)) {
- /* stereo mixers */
- if (left == 0 && right == 0) {
- val = AC97_MUTE;
- } else {
- if (oss_channel == SOUND_MIXER_IGAIN) {
- right = (right * mh->scale) / 100;
- left = (left * mh->scale) / 100;
- if (right >= mh->scale)
- right = mh->scale-1;
- if (left >= mh->scale)
- left = mh->scale-1;
- } else {
- /* these may have 5 or 6 bit resolution */
- if (oss_channel == SOUND_MIXER_VOLUME ||
- oss_channel == SOUND_MIXER_ALTPCM)
- scale = (1 << codec->bit_resolution);
- else
- scale = mh->scale;
- right = ((100 - right) * scale) / 100;
- left = ((100 - left) * scale) / 100;
- if (right >= scale)
- right = scale-1;
- if (left >= scale)
- left = scale-1;
- }
- val = (left << 8) | right;
- }
- } else if (oss_channel == SOUND_MIXER_BASS) {
- val = codec->codec_read(codec , mh->offset) & ~0x0f00;
- left = ((100 - left) * mh->scale) / 100;
- if (left >= mh->scale)
- left = mh->scale-1;
- val |= (left << 8) & 0x0e00;
- } else if (oss_channel == SOUND_MIXER_TREBLE) {
- val = codec->codec_read(codec , mh->offset) & ~0x000f;
- left = ((100 - left) * mh->scale) / 100;
- if (left >= mh->scale)
- left = mh->scale-1;
- val |= left & 0x000e;
- } else if(left == 0) {
- val = AC97_MUTE;
- } else if (oss_channel == SOUND_MIXER_SPEAKER) {
- left = ((100 - left) * mh->scale) / 100;
- if (left >= mh->scale)
- left = mh->scale-1;
- val = left << 1;
- } else if (oss_channel == SOUND_MIXER_PHONEIN) {
- left = ((100 - left) * mh->scale) / 100;
- if (left >= mh->scale)
- left = mh->scale-1;
- val = left;
- } else if (oss_channel == SOUND_MIXER_PHONEOUT) {
- scale = (1 << codec->bit_resolution);
- left = ((100 - left) * scale) / 100;
- if (left >= mh->scale)
- left = mh->scale-1;
- val = left;
- } else if (oss_channel == SOUND_MIXER_MIC) {
- val = codec->codec_read(codec , mh->offset) & ~0x801f;
- left = ((100 - left) * mh->scale) / 100;
- if (left >= mh->scale)
- left = mh->scale-1;
- val |= left;
- /* the low bit is optional in the tone sliders and masking
- it lets us avoid the 0xf 'bypass'.. */
- }
- #ifdef DEBUG
- printk(" 0x%04x", val);
- #endif
- codec->codec_write(codec, mh->offset, val);
- #ifdef DEBUG
- val = codec->codec_read(codec, mh->offset);
- printk(" -> 0x%04xn", val);
- #endif
- }
- /* a thin wrapper for write_mixer */
- static void ac97_set_mixer(struct ac97_codec *codec, unsigned int oss_mixer, unsigned int val )
- {
- unsigned int left,right;
- /* cleanse input a little */
- right = ((val >> 8) & 0xff) ;
- left = (val & 0xff) ;
- if (right > 100) right = 100;
- if (left > 100) left = 100;
- codec->mixer_state[oss_mixer] = (right << 8) | left;
- codec->write_mixer(codec, oss_mixer, left, right);
- }
- /* read or write the recmask, the ac97 can really have left and right recording
- inputs independantly set, but OSS doesn't seem to want us to express that to
- the user. the caller guarantees that we have a supported bit set, and they
- must be holding the card's spinlock */
- static int ac97_recmask_io(struct ac97_codec *codec, int rw, int mask)
- {
- unsigned int val;
- if (rw) {
- /* read it from the card */
- val = codec->codec_read(codec, AC97_RECORD_SELECT);
- #ifdef DEBUG
- printk("ac97_codec: ac97 recmask to set to 0x%04xn", val);
- #endif
- return (1 << ac97_rm2oss[val & 0x07]);
- }
- /* else, write the first set in the mask as the
- output */
- /* clear out current set value first (AC97 supports only 1 input!) */
- val = (1 << ac97_rm2oss[codec->codec_read(codec, AC97_RECORD_SELECT) & 0x07]);
- if (mask != val)
- mask &= ~val;
-
- val = ffs(mask);
- val = ac97_oss_rm[val-1];
- val |= val << 8; /* set both channels */
- #ifdef DEBUG
- printk("ac97_codec: setting ac97 recmask to 0x%04xn", val);
- #endif
- codec->codec_write(codec, AC97_RECORD_SELECT, val);
- return 0;
- };
- static int ac97_mixer_ioctl(struct ac97_codec *codec, unsigned int cmd, unsigned long arg)
- {
- int i, val = 0;
- if (cmd == SOUND_MIXER_INFO) {
- mixer_info info;
- strncpy(info.id, codec->name, sizeof(info.id));
- strncpy(info.name, codec->name, sizeof(info.name));
- info.modify_counter = codec->modcnt;
- if (copy_to_user((void *)arg, &info, sizeof(info)))
- return -EFAULT;
- return 0;
- }
- if (cmd == SOUND_OLD_MIXER_INFO) {
- _old_mixer_info info;
- strncpy(info.id, codec->name, sizeof(info.id));
- strncpy(info.name, codec->name, sizeof(info.name));
- if (copy_to_user((void *)arg, &info, sizeof(info)))
- return -EFAULT;
- return 0;
- }
- if (_IOC_TYPE(cmd) != 'M' || _SIOC_SIZE(cmd) != sizeof(int))
- return -EINVAL;
- if (cmd == OSS_GETVERSION)
- return put_user(SOUND_VERSION, (int *)arg);
- if (_SIOC_DIR(cmd) == _SIOC_READ) {
- switch (_IOC_NR(cmd)) {
- case SOUND_MIXER_RECSRC: /* give them the current record source */
- if (!codec->recmask_io) {
- val = 0;
- } else {
- val = codec->recmask_io(codec, 1, 0);
- }
- break;
- case SOUND_MIXER_DEVMASK: /* give them the supported mixers */
- val = codec->supported_mixers;
- break;
- case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
- val = codec->record_sources;
- break;
- case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */
- val = codec->stereo_mixers;
- break;
- case SOUND_MIXER_CAPS:
- val = SOUND_CAP_EXCL_INPUT;
- break;
- default: /* read a specific mixer */
- i = _IOC_NR(cmd);
- if (!supported_mixer(codec, i))
- return -EINVAL;
- /* do we ever want to touch the hardware? */
- /* val = codec->read_mixer(codec, i); */
- val = codec->mixer_state[i];
- break;
- }
- return put_user(val, (int *)arg);
- }
- if (_SIOC_DIR(cmd) == (_SIOC_WRITE|_SIOC_READ)) {
- codec->modcnt++;
- if (get_user(val, (int *)arg))
- return -EFAULT;
- switch (_IOC_NR(cmd)) {
- case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
- if (!codec->recmask_io) return -EINVAL;
- if (!val) return 0;
- if (!(val &= codec->record_sources)) return -EINVAL;
- codec->recmask_io(codec, 0, val);
- return 0;
- default: /* write a specific mixer */
- i = _IOC_NR(cmd);
- if (!supported_mixer(codec, i))
- return -EINVAL;
- ac97_set_mixer(codec, i, val);
- return 0;
- }
- }
- return -EINVAL;
- }
- /* entry point for /proc/driver/controller_vendor/ac97/%d */
- int ac97_read_proc (char *page, char **start, off_t off,
- int count, int *eof, void *data)
- {
- int len = 0, cap, extid, val, id1, id2;
- struct ac97_codec *codec;
- int is_ac97_20 = 0;
- if ((codec = data) == NULL)
- return -ENODEV;
- id1 = codec->codec_read(codec, AC97_VENDOR_ID1);
- id2 = codec->codec_read(codec, AC97_VENDOR_ID2);
- len += sprintf (page+len, "Vendor name : %sn", codec->name);
- len += sprintf (page+len, "Vendor id : %04X %04Xn", id1, id2);
- extid = codec->codec_read(codec, AC97_EXTENDED_ID);
- extid &= ~((1<<2)|(1<<4)|(1<<5)|(1<<10)|(1<<11)|(1<<12)|(1<<13));
- len += sprintf (page+len, "AC97 Version : %sn",
- extid ? "2.0 or later" : "1.0");
- if (extid) is_ac97_20 = 1;
- cap = codec->codec_read(codec, AC97_RESET);
- len += sprintf (page+len, "Capabilities :%s%s%s%s%s%sn",
- cap & 0x0001 ? " -dedicated MIC PCM IN channel-" : "",
- cap & 0x0002 ? " -reserved1-" : "",
- cap & 0x0004 ? " -bass & treble-" : "",
- cap & 0x0008 ? " -simulated stereo-" : "",
- cap & 0x0010 ? " -headphone out-" : "",
- cap & 0x0020 ? " -loudness-" : "");
- val = cap & 0x00c0;
- len += sprintf (page+len, "DAC resolutions :%s%s%sn",
- " -16-bit-",
- val & 0x0040 ? " -18-bit-" : "",
- val & 0x0080 ? " -20-bit-" : "");
- val = cap & 0x0300;
- len += sprintf (page+len, "ADC resolutions :%s%s%sn",
- " -16-bit-",
- val & 0x0100 ? " -18-bit-" : "",
- val & 0x0200 ? " -20-bit-" : "");
- len += sprintf (page+len, "3D enhancement : %sn",
- ac97_stereo_enhancements[(cap >> 10) & 0x1f]);
- val = codec->codec_read(codec, AC97_GENERAL_PURPOSE);
- len += sprintf (page+len, "POP path : %s 3Dn"
- "Sim. stereo : %sn"
- "3D enhancement : %sn"
- "Loudness : %sn"
- "Mono output : %sn"
- "MIC select : %sn"
- "ADC/DAC loopback : %sn",
- val & 0x8000 ? "post" : "pre",
- val & 0x4000 ? "on" : "off",
- val & 0x2000 ? "on" : "off",
- val & 0x1000 ? "on" : "off",
- val & 0x0200 ? "MIC" : "MIX",
- val & 0x0100 ? "MIC2" : "MIC1",
- val & 0x0080 ? "on" : "off");
- extid = codec->codec_read(codec, AC97_EXTENDED_ID);
- cap = extid;
- len += sprintf (page+len, "Ext Capabilities :%s%s%s%s%s%s%sn",
- cap & 0x0001 ? " -var rate PCM audio-" : "",
- cap & 0x0002 ? " -2x PCM audio out-" : "",
- cap & 0x0008 ? " -var rate MIC in-" : "",
- cap & 0x0040 ? " -PCM center DAC-" : "",
- cap & 0x0080 ? " -PCM surround DAC-" : "",
- cap & 0x0100 ? " -PCM LFE DAC-" : "",
- cap & 0x0200 ? " -slot/DAC mappings-" : "");
- if (is_ac97_20) {
- len += sprintf (page+len, "Front DAC rate : %dn",
- codec->codec_read(codec, AC97_PCM_FRONT_DAC_RATE));
- }
- return len;
- }
- /**
- * ac97_probe_codec - Initialize and setup AC97-compatible codec
- * @codec: (in/out) Kernel info for a single AC97 codec
- *
- * Reset the AC97 codec, then initialize the mixer and
- * the rest of the @codec structure.
- *
- * The codec_read and codec_write fields of @codec are
- * required to be setup and working when this function
- * is called. All other fields are set by this function.
- *
- * codec_wait field of @codec can optionally be provided
- * when calling this function. If codec_wait is not %NULL,
- * this function will call codec_wait any time it is
- * necessary to wait for the audio chip to reach the
- * codec-ready state. If codec_wait is %NULL, then
- * the default behavior is to call schedule_timeout.
- * Currently codec_wait is used to wait for AC97 codec
- * reset to complete.
- *
- * Returns 1 (true) on success, or 0 (false) on failure.
- */
-
- int ac97_probe_codec(struct ac97_codec *codec)
- {
- u16 id1, id2;
- u16 audio, modem;
- int i;
- /* probing AC97 codec, AC97 2.0 says that bit 15 of register 0x00 (reset) should
- * be read zero.
- *
- * FIXME: is the following comment outdated? -jgarzik
- * Probing of AC97 in this way is not reliable, it is not even SAFE !!
- */
- codec->codec_write(codec, AC97_RESET, 0L);
- /* also according to spec, we wait for codec-ready state */
- if (codec->codec_wait)
- codec->codec_wait(codec);
- else
- udelay(10);
- if ((audio = codec->codec_read(codec, AC97_RESET)) & 0x8000) {
- printk(KERN_ERR "ac97_codec: %s ac97 codec not presentn",
- codec->id ? "Secondary" : "Primary");
- return 0;
- }
- /* probe for Modem Codec */
- codec->codec_write(codec, AC97_EXTENDED_MODEM_ID, 0L);
- modem = codec->codec_read(codec, AC97_EXTENDED_MODEM_ID);
- codec->name = NULL;
- codec->codec_ops = &null_ops;
- id1 = codec->codec_read(codec, AC97_VENDOR_ID1);
- id2 = codec->codec_read(codec, AC97_VENDOR_ID2);
- for (i = 0; i < ARRAY_SIZE(ac97_codec_ids); i++) {
- if (ac97_codec_ids[i].id == ((id1 << 16) | id2)) {
- codec->type = ac97_codec_ids[i].id;
- codec->name = ac97_codec_ids[i].name;
- codec->codec_ops = ac97_codec_ids[i].ops;
- break;
- }
- }
- if (codec->name == NULL)
- codec->name = "Unknown";
- printk(KERN_INFO "ac97_codec: AC97 %s codec, id: 0x%04x:"
- "0x%04x (%s)n", audio ? "Audio" : (modem ? "Modem" : ""),
- id1, id2, codec->name);
- return ac97_init_mixer(codec);
- }
- static int ac97_init_mixer(struct ac97_codec *codec)
- {
- u16 cap;
- int i;
- cap = codec->codec_read(codec, AC97_RESET);
- /* mixer masks */
- codec->supported_mixers = AC97_SUPPORTED_MASK;
- codec->stereo_mixers = AC97_STEREO_MASK;
- codec->record_sources = AC97_RECORD_MASK;
- if (!(cap & 0x04))
- codec->supported_mixers &= ~(SOUND_MASK_BASS|SOUND_MASK_TREBLE);
- if (!(cap & 0x10))
- codec->supported_mixers &= ~SOUND_MASK_ALTPCM;
- /* detect bit resolution */
- codec->codec_write(codec, AC97_MASTER_VOL_STEREO, 0x2020);
- if(codec->codec_read(codec, AC97_MASTER_VOL_STEREO) == 0x1f1f)
- codec->bit_resolution = 5;
- else
- codec->bit_resolution = 6;
- /* generic OSS to AC97 wrapper */
- codec->read_mixer = ac97_read_mixer;
- codec->write_mixer = ac97_write_mixer;
- codec->recmask_io = ac97_recmask_io;
- codec->mixer_ioctl = ac97_mixer_ioctl;
- /* codec specific initialization for 4-6 channel output or secondary codec stuff */
- if (codec->codec_ops->init != NULL) {
- codec->codec_ops->init(codec);
- }
- /* initialize mixer channel volumes */
- for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
- struct mixer_defaults *md = &mixer_defaults[i];
- if (md->mixer == -1)
- break;
- if (!supported_mixer(codec, md->mixer))
- continue;
- ac97_set_mixer(codec, md->mixer, md->value);
- }
- return 1;
- }
- #define AC97_SIGMATEL_ANALOG 0x6c /* Analog Special */
- #define AC97_SIGMATEL_DAC2INVERT 0x6e
- #define AC97_SIGMATEL_BIAS1 0x70
- #define AC97_SIGMATEL_BIAS2 0x72
- #define AC97_SIGMATEL_MULTICHN 0x74 /* Multi-Channel programming */
- #define AC97_SIGMATEL_CIC1 0x76
- #define AC97_SIGMATEL_CIC2 0x78
- static int sigmatel_9708_init(struct ac97_codec * codec)
- {
- u16 codec72, codec6c;
- codec72 = codec->codec_read(codec, AC97_SIGMATEL_BIAS2) & 0x8000;
- codec6c = codec->codec_read(codec, AC97_SIGMATEL_ANALOG);
- if ((codec72==0) && (codec6c==0)) {
- codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
- codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x1000);
- codec->codec_write(codec, AC97_SIGMATEL_BIAS1, 0xabba);
- codec->codec_write(codec, AC97_SIGMATEL_BIAS2, 0x0007);
- } else if ((codec72==0x8000) && (codec6c==0)) {
- codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
- codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x1001);
- codec->codec_write(codec, AC97_SIGMATEL_DAC2INVERT, 0x0008);
- } else if ((codec72==0x8000) && (codec6c==0x0080)) {
- /* nothing */
- }
- codec->codec_write(codec, AC97_SIGMATEL_MULTICHN, 0x0000);
- return 0;
- }
- static int sigmatel_9721_init(struct ac97_codec * codec)
- {
- /* Only set up secondary codec */
- if (codec->id == 0)
- return 0;
- codec->codec_write(codec, AC97_SURROUND_MASTER, 0L);
- /* initialize SigmaTel STAC9721/23 as secondary codec, decoding AC link
- sloc 3,4 = 0x01, slot 7,8 = 0x00, */
- codec->codec_write(codec, AC97_SIGMATEL_MULTICHN, 0x00);
- /* we don't have the crystal when we are on an AMR card, so use
- BIT_CLK as our clock source. Write the magic word ABBA and read
- back to enable register 0x78 */
- codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
- codec->codec_read(codec, AC97_SIGMATEL_CIC1);
- /* sync all the clocks*/
- codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x3802);
- return 0;
- }
- static int sigmatel_9744_init(struct ac97_codec * codec)
- {
- // patch for SigmaTel
- codec->codec_write(codec, AC97_SIGMATEL_CIC1, 0xabba);
- codec->codec_write(codec, AC97_SIGMATEL_CIC2, 0x0000); // is this correct? --jk
- codec->codec_write(codec, AC97_SIGMATEL_BIAS1, 0xabba);
- codec->codec_write(codec, AC97_SIGMATEL_BIAS2, 0x0002);
- codec->codec_write(codec, AC97_SIGMATEL_MULTICHN, 0x0000);
- return 0;
- }
- static int wolfson_init(struct ac97_codec * codec)
- {
- codec->codec_write(codec, 0x72, 0x0808);
- codec->codec_write(codec, 0x74, 0x0808);
- // patch for DVD noise
- codec->codec_write(codec, 0x5a, 0x0200);
- // init vol as PCM vol
- codec->codec_write(codec, 0x70,
- codec->codec_read(codec, AC97_PCMOUT_VOL));
- codec->codec_write(codec, AC97_SURROUND_MASTER, 0x0000);
- return 0;
- }
- static int tritech_init(struct ac97_codec * codec)
- {
- codec->codec_write(codec, 0x26, 0x0300);
- codec->codec_write(codec, 0x26, 0x0000);
- codec->codec_write(codec, AC97_SURROUND_MASTER, 0x0000);
- codec->codec_write(codec, AC97_RESERVED_3A, 0x0000);
- return 0;
- }
- /* copied from drivers/sound/maestro.c */
- static int tritech_maestro_init(struct ac97_codec * codec)
- {
- /* no idea what this does */
- codec->codec_write(codec, 0x2A, 0x0001);
- codec->codec_write(codec, 0x2C, 0x0000);
- codec->codec_write(codec, 0x2C, 0XFFFF);
- return 0;
- }
- /*
- * This is basically standard AC97. It should work as a default for
- * almost all modern codecs. Note that some cards wire EAPD *backwards*
- * That side of it is up to the card driver not us to cope with.
- *
- */
- static int eapd_control(struct ac97_codec * codec, int on)
- {
- if(on)
- codec->codec_write(codec, AC97_POWER_CONTROL,
- codec->codec_read(codec, AC97_POWER_CONTROL)|0x8000);
- else
- codec->codec_write(codec, AC97_POWER_CONTROL,
- codec->codec_read(codec, AC97_POWER_CONTROL)&~0x8000);
- return 0;
- }
- /*
- * Crystal digital audio control (CS4299
- */
-
- static int crystal_digital_control(struct ac97_codec *codec, int mode)
- {
- u16 cv;
- switch(mode)
- {
- case 0: cv = 0x0; break; /* SPEN off */
- case 1: cv = 0x8004; break; /* 48KHz digital */
- case 2: cv = 0x8104; break; /* 44.1KHz digital */
- default:
- return -1; /* Not supported yet(eg AC3) */
- }
- codec->codec_write(codec, 0x68, cv);
- return 0;
- }
- /* copied from drivers/sound/maestro.c */
- #if 0 /* there has been 1 person on the planet with a pt101 that we
- know of. If they care, they can put this back in :) */
- static int pt101_init(struct ac97_codec * codec)
- {
- printk(KERN_INFO "ac97_codec: PT101 Codec detected, initializing but _not_ installing mixer device.n");
- /* who knows.. */
- codec->codec_write(codec, 0x2A, 0x0001);
- codec->codec_write(codec, 0x2C, 0x0000);
- codec->codec_write(codec, 0x2C, 0xFFFF);
- codec->codec_write(codec, 0x10, 0x9F1F);
- codec->codec_write(codec, 0x12, 0x0808);
- codec->codec_write(codec, 0x14, 0x9F1F);
- codec->codec_write(codec, 0x16, 0x9F1F);
- codec->codec_write(codec, 0x18, 0x0404);
- codec->codec_write(codec, 0x1A, 0x0000);
- codec->codec_write(codec, 0x1C, 0x0000);
- codec->codec_write(codec, 0x02, 0x0404);
- codec->codec_write(codec, 0x04, 0x0808);
- codec->codec_write(codec, 0x0C, 0x801F);
- codec->codec_write(codec, 0x0E, 0x801F);
- return 0;
- }
- #endif
-
- EXPORT_SYMBOL(ac97_read_proc);
- EXPORT_SYMBOL(ac97_probe_codec);
- /*
- * AC97 library support routines
- */
-
- /**
- * ac97_set_dac_rate - set codec rate adaption
- * @codec: ac97 code
- * @rate: rate in hertz
- *
- * Set the DAC rate. Assumes the codec supports VRA. The caller is
- * expected to have checked this little detail.
- */
-
- unsigned int ac97_set_dac_rate(struct ac97_codec *codec, unsigned int rate)
- {
- unsigned int new_rate = rate;
- u32 dacp;
- u32 mast_vol, phone_vol, mono_vol, pcm_vol;
- u32 mute_vol = 0x8000; /* The mute volume? */
- if(rate != codec->codec_read(codec, AC97_PCM_FRONT_DAC_RATE))
- {
- /* Mute several registers */
- mast_vol = codec->codec_read(codec, AC97_MASTER_VOL_STEREO);
- mono_vol = codec->codec_read(codec, AC97_MASTER_VOL_MONO);
- phone_vol = codec->codec_read(codec, AC97_HEADPHONE_VOL);
- pcm_vol = codec->codec_read(codec, AC97_PCMOUT_VOL);
- codec->codec_write(codec, AC97_MASTER_VOL_STEREO, mute_vol);
- codec->codec_write(codec, AC97_MASTER_VOL_MONO, mute_vol);
- codec->codec_write(codec, AC97_HEADPHONE_VOL, mute_vol);
- codec->codec_write(codec, AC97_PCMOUT_VOL, mute_vol);
-
- /* Power down the DAC */
- dacp=codec->codec_read(codec, AC97_POWER_CONTROL);
- codec->codec_write(codec, AC97_POWER_CONTROL, dacp|0x0200);
- /* Load the rate and read the effective rate */
- codec->codec_write(codec, AC97_PCM_FRONT_DAC_RATE, rate);
- new_rate=codec->codec_read(codec, AC97_PCM_FRONT_DAC_RATE);
- /* Power it back up */
- codec->codec_write(codec, AC97_POWER_CONTROL, dacp);
- /* Restore volumes */
- codec->codec_write(codec, AC97_MASTER_VOL_STEREO, mast_vol);
- codec->codec_write(codec, AC97_MASTER_VOL_MONO, mono_vol);
- codec->codec_write(codec, AC97_HEADPHONE_VOL, phone_vol);
- codec->codec_write(codec, AC97_PCMOUT_VOL, pcm_vol);
- }
- return new_rate;
- }
- EXPORT_SYMBOL(ac97_set_dac_rate);
- /**
- * ac97_set_adc_rate - set codec rate adaption
- * @codec: ac97 code
- * @rate: rate in hertz
- *
- * Set the ADC rate. Assumes the codec supports VRA. The caller is
- * expected to have checked this little detail.
- */
- unsigned int ac97_set_adc_rate(struct ac97_codec *codec, unsigned int rate)
- {
- unsigned int new_rate = rate;
- u32 dacp;
- if(rate != codec->codec_read(codec, AC97_PCM_LR_ADC_RATE))
- {
- /* Power down the ADC */
- dacp=codec->codec_read(codec, AC97_POWER_CONTROL);
- codec->codec_write(codec, AC97_POWER_CONTROL, dacp|0x0100);
- /* Load the rate and read the effective rate */
- codec->codec_write(codec, AC97_PCM_LR_ADC_RATE, rate);
- new_rate=codec->codec_read(codec, AC97_PCM_LR_ADC_RATE);
- /* Power it back up */
- codec->codec_write(codec, AC97_POWER_CONTROL, dacp);
- }
- return new_rate;
- }
- EXPORT_SYMBOL(ac97_set_adc_rate);
- int ac97_save_state(struct ac97_codec *codec)
- {
- return 0;
- }
- EXPORT_SYMBOL(ac97_save_state);
- int ac97_restore_state(struct ac97_codec *codec)
- {
- int i;
- unsigned int left, right, val;
- for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
- if (!supported_mixer(codec, i))
- continue;
- val = codec->mixer_state[i];
- right = val >> 8;
- left = val & 0xff;
- codec->write_mixer(codec, i, left, right);
- }
- return 0;
- }
- EXPORT_SYMBOL(ac97_restore_state);
- MODULE_LICENSE("GPL");