diff options
Diffstat (limited to 'sound/oss/ac97.c')
| -rw-r--r-- | sound/oss/ac97.c | 432 |
1 files changed, 0 insertions, 432 deletions
diff --git a/sound/oss/ac97.c b/sound/oss/ac97.c deleted file mode 100644 index 72cf4ed7793..00000000000 --- a/sound/oss/ac97.c +++ /dev/null @@ -1,432 +0,0 @@ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include "ac97.h" - -/* Flag for mono controls. */ -#define MO 0 -/* And for stereo. */ -#define ST 1 - -/* Whether or not the bits in the channel are inverted. */ -#define INV 1 -#define NINV 0 - -static struct ac97_chn_desc { - int ac97_regnum; - int oss_channel; - int maxval; - int is_stereo; - int oss_mask; - int recordNum; - u16 regmask; - int is_inverted; -} mixerRegs[] = { - { AC97_MASTER_VOL_STEREO, SOUND_MIXER_VOLUME, 0x3f, ST, SOUND_MASK_VOLUME, 5, 0x0000, INV }, - { AC97_MASTER_VOL_MONO, SOUND_MIXER_PHONEOUT, 0x3f, MO, SOUND_MASK_PHONEOUT, 6, 0x0000, INV }, - { AC97_MASTER_TONE, SOUND_MIXER_TREBLE, 0x0f, MO, SOUND_MASK_TREBLE, -1, 0x00ff, INV }, - { AC97_MASTER_TONE, SOUND_MIXER_BASS, 0x0f, MO, SOUND_MASK_BASS, -1, 0xff00, INV }, - { AC97_PCBEEP_VOL, SOUND_MIXER_SPEAKER, 0x0f, MO, SOUND_MASK_SPEAKER, -1, 0x001e, INV }, - { AC97_PHONE_VOL, SOUND_MIXER_PHONEIN, 0x1f, MO, SOUND_MASK_PHONEIN, 7, 0x0000, INV }, - { AC97_MIC_VOL, SOUND_MIXER_MIC, 0x1f, MO, SOUND_MASK_MIC, 0, 0x0000, INV }, - { AC97_LINEIN_VOL, SOUND_MIXER_LINE, 0x1f, ST, SOUND_MASK_LINE, 4, 0x0000, INV }, - { AC97_CD_VOL, SOUND_MIXER_CD, 0x1f, ST, SOUND_MASK_CD, 1, 0x0000, INV }, - { AC97_VIDEO_VOL, SOUND_MIXER_VIDEO, 0x1f, ST, SOUND_MASK_VIDEO, 2, 0x0000, INV }, - { AC97_AUX_VOL, SOUND_MIXER_LINE1, 0x1f, ST, SOUND_MASK_LINE1, 3, 0x0000, INV }, - { AC97_PCMOUT_VOL, SOUND_MIXER_PCM, 0x1f, ST, SOUND_MASK_PCM, -1, 0x0000, INV }, - { AC97_RECORD_GAIN, SOUND_MIXER_IGAIN, 0x0f, ST, SOUND_MASK_IGAIN, -1, 0x0000, NINV }, - { -1, -1, 0xff, 0, 0, -1, 0x0000, 0 }, -}; - -static struct ac97_chn_desc * -ac97_find_chndesc (struct ac97_hwint *dev, int oss_channel) -{ - int x; - - for (x = 0; mixerRegs[x].oss_channel != -1; x++) { - if (mixerRegs[x].oss_channel == oss_channel) - return mixerRegs + x; - } - - return NULL; -} - -static inline int -ac97_is_valid_channel (struct ac97_hwint *dev, struct ac97_chn_desc *chn) -{ - return (dev->last_written_mixer_values[chn->ac97_regnum / 2] - != AC97_REG_UNSUPPORTED); -} - -int -ac97_init (struct ac97_hwint *dev) -{ - int x; - int reg0; - - /* Clear out the arrays of cached values. */ - for (x = 0; x < AC97_REG_CNT; x++) - dev->last_written_mixer_values[x] = AC97_REGVAL_UNKNOWN; - - for (x = 0; x < SOUND_MIXER_NRDEVICES; x++) - dev->last_written_OSS_values[x] = AC97_REGVAL_UNKNOWN; - - /* Clear the device masks. */ - dev->mixer_devmask = 0; - dev->mixer_stereomask = 0; - dev->mixer_recmask = 0; - - /* ??? Do a "standard reset" via register 0? */ - - /* Hardware-dependent reset. */ - if (dev->reset_device (dev)) - return -1; - - /* Check the mixer device capabilities. */ - reg0 = dev->read_reg (dev, AC97_RESET); - - if (reg0 < 0) - return -1; - - /* Check for support for treble/bass controls. */ - if (! (reg0 & 4)) { - dev->last_written_mixer_values[AC97_MASTER_TONE / 2] - = AC97_REG_UNSUPPORTED; - } - - /* ??? There may be other tests here? */ - - /* Fill in the device masks. */ - for (x = 0; mixerRegs[x].ac97_regnum != -1; x++) { - if (ac97_is_valid_channel (dev, mixerRegs + x)) { - dev->mixer_devmask |= mixerRegs[x].oss_mask; - - if (mixerRegs[x].is_stereo) - dev->mixer_stereomask |= mixerRegs[x].oss_mask; - - if (mixerRegs[x].recordNum != -1) - dev->mixer_recmask |= mixerRegs[x].oss_mask; - } - } - - return 0; -} - -/* Return the contents of register REG; use the cache if the value in it - is valid. Returns a negative error code on failure. */ -static int -ac97_get_register (struct ac97_hwint *dev, u8 reg) -{ - if (reg > 127 || (reg & 1)) - return -EINVAL; - - /* See if it's in the cache, or if it's just plain invalid. */ - switch (dev->last_written_mixer_values[reg / 2]) { - case AC97_REG_UNSUPPORTED: - return -EINVAL; - break; - case AC97_REGVAL_UNKNOWN: - dev->last_written_mixer_values[reg / 2] = dev->read_reg (dev, reg); - break; - default: - break; - } - return dev->last_written_mixer_values[reg / 2]; -} - -/* Write VALUE to AC97 register REG, and cache its value in the last-written - cache. Returns a negative error code on failure, or 0 on success. */ -int -ac97_put_register (struct ac97_hwint *dev, u8 reg, u16 value) -{ - if (reg > 127 || (reg & 1)) - return -EINVAL; - - if (dev->last_written_mixer_values[reg / 2] == AC97_REG_UNSUPPORTED) - return -EINVAL; - else { - int res = dev->write_reg (dev, reg, value); - if (res >= 0) { - dev->last_written_mixer_values[reg / 2] = value; - return 0; - } - else - return res; - } -} - -/* Scale VALUE (a value fro 0 to MAXVAL) to a value from 0-100. If - IS_STEREO is set, VALUE is a stereo value; the left channel value - is in the lower 8 bits, and the right channel value is in the upper - 8 bits. - - A negative error code is returned on failure, or the unsigned - scaled value on success. */ - -static int -ac97_scale_to_oss_val (int value, int maxval, int is_stereo, int inv) -{ - /* Muted? */ - if (value & AC97_MUTE) - return 0; - - if (is_stereo) - return (ac97_scale_to_oss_val (value & 255, maxval, 0, inv) << 8) - | (ac97_scale_to_oss_val ((value >> 8) & 255, maxval, 0, inv) << 0); - else { - int i; - - /* Inverted. */ - if (inv) - value = maxval - value; - - i = (value * 100 + (maxval / 2)) / maxval; - if (i > 100) - i = 100; - if (i < 0) - i = 0; - return i; - } -} - -static int -ac97_scale_from_oss_val (int value, int maxval, int is_stereo, int inv) -{ - if (is_stereo) - return (ac97_scale_from_oss_val (value & 255, maxval, 0, inv) << 8) - | (ac97_scale_from_oss_val ((value >> 8) & 255, maxval, 0, inv) << 0); - else { - int i = ((value & 255) * maxval + 50) / 100; - if (inv) - i = maxval - i; - if (i < 0) - i = 0; - if (i > maxval) - i = maxval; - return i; - } -} - -static int -ac97_set_mixer (struct ac97_hwint *dev, int oss_channel, u16 oss_value) -{ - int scaled_value; - struct ac97_chn_desc *channel = ac97_find_chndesc (dev, oss_channel); - int result; - - if (channel == NULL) - return -ENODEV; - if (! ac97_is_valid_channel (dev, channel)) - return -ENODEV; - scaled_value = ac97_scale_from_oss_val (oss_value, channel->maxval, - channel->is_stereo, - channel->is_inverted); - if (scaled_value < 0) - return scaled_value; - - if (channel->regmask != 0) { - int mv; - - int oldval = ac97_get_register (dev, channel->ac97_regnum); - if (oldval < 0) - return oldval; - - for (mv = channel->regmask; ! (mv & 1); mv >>= 1) - scaled_value <<= 1; - - scaled_value &= channel->regmask; - scaled_value |= (oldval & ~channel->regmask); - } - result = ac97_put_register (dev, channel->ac97_regnum, scaled_value); - if (result == 0) - dev->last_written_OSS_values[oss_channel] = oss_value; - return result; -} - -static int -ac97_get_mixer_scaled (struct ac97_hwint *dev, int oss_channel) -{ - struct ac97_chn_desc *channel = ac97_find_chndesc (dev, oss_channel); - int regval; - - if (channel == NULL) - return -ENODEV; - - if (! ac97_is_valid_channel (dev, channel)) - return -ENODEV; - - regval = ac97_get_register (dev, channel->ac97_regnum); - - if (regval < 0) - return regval; - - if (channel->regmask != 0) { - int mv; - - regval &= channel->regmask; - - for (mv = channel->regmask; ! (mv & 1); mv >>= 1) - regval >>= 1; - } - return ac97_scale_to_oss_val (regval, channel->maxval, - channel->is_stereo, - channel->is_inverted); -} - -static int -ac97_get_recmask (struct ac97_hwint *dev) -{ - int recReg = ac97_get_register (dev, AC97_RECORD_SELECT); - - if (recReg < 0) - return recReg; - else { - int x; - for (x = 0; mixerRegs[x].ac97_regnum >= 0; x++) { - if (mixerRegs[x].recordNum == (recReg & 7)) - return mixerRegs[x].oss_mask; - } - return -ENODEV; - } -} - -static int -ac97_set_recmask (struct ac97_hwint *dev, int oss_recmask) -{ - int x; - - if (oss_recmask == 0) - oss_recmask = SOUND_MIXER_MIC; - - for (x = 0; mixerRegs[x].ac97_regnum >= 0; x++) { - if ((mixerRegs[x].recordNum >= 0) - && (oss_recmask & mixerRegs[x].oss_mask)) - break; - } - if (mixerRegs[x].ac97_regnum < 0) - return -ENODEV; - else { - int regval = (mixerRegs[x].recordNum << 8) | mixerRegs[x].recordNum; - int res = ac97_put_register (dev, AC97_RECORD_SELECT, regval); - if (res == 0) - return ac97_get_recmask (dev); - else - return res; - } -} - -/* Set the mixer DEV to the list of values in VALUE_LIST. Return 0 on - success, or a negative error code. */ -int -ac97_set_values (struct ac97_hwint *dev, - struct ac97_mixer_value_list *value_list) -{ - int x; - - for (x = 0; value_list[x].oss_channel != -1; x++) { - int chnum = value_list[x].oss_channel; - struct ac97_chn_desc *chent = ac97_find_chndesc (dev, chnum); - if (chent != NULL) { - u16 val; - int res; - - if (chent->is_stereo) - val = (value_list[x].value.stereo.right << 8) - | value_list[x].value.stereo.left; - else { - /* We do this so the returned value looks OK in the - mixer app. It's not necessary otherwise. */ - val = (value_list[x].value.mono << 8) - | value_list[x].value.mono; - } - res = ac97_set_mixer (dev, chnum, val); - if (res < 0) - return res; - } - else - return -ENODEV; - } - return 0; -} - -int -ac97_mixer_ioctl (struct ac97_hwint *dev, unsigned int cmd, void __user *arg) -{ - int ret; - - switch (cmd) { - case SOUND_MIXER_READ_RECSRC: - ret = ac97_get_recmask (dev); - break; - - case SOUND_MIXER_WRITE_RECSRC: - { - if (get_user (ret, (int __user *) arg)) - ret = -EFAULT; - else - ret = ac97_set_recmask (dev, ret); - } - break; - - case SOUND_MIXER_READ_CAPS: - ret = SOUND_CAP_EXCL_INPUT; - break; - - case SOUND_MIXER_READ_DEVMASK: - ret = dev->mixer_devmask; - break; - - case SOUND_MIXER_READ_RECMASK: - ret = dev->mixer_recmask; - break; - - case SOUND_MIXER_READ_STEREODEVS: - ret = dev->mixer_stereomask; - break; - - default: - /* Read or write request. */ - ret = -EINVAL; - if (_IOC_TYPE (cmd) == 'M') { - int dir = _SIOC_DIR (cmd); - int channel = _IOC_NR (cmd); - - if (channel >= 0 && channel < SOUND_MIXER_NRDEVICES) { - ret = 0; - if (dir & _SIOC_WRITE) { - int val; - if (get_user (val, (int __user *) arg) == 0) - ret = ac97_set_mixer (dev, channel, val); - else - ret = -EFAULT; - } - if (ret >= 0 && (dir & _SIOC_READ)) { - if (dev->last_written_OSS_values[channel] - == AC97_REGVAL_UNKNOWN) - dev->last_written_OSS_values[channel] - = ac97_get_mixer_scaled (dev, channel); - ret = dev->last_written_OSS_values[channel]; - } - } - } - break; - } - - if (ret < 0) - return ret; - else - return put_user(ret, (int __user *) arg); -} - -EXPORT_SYMBOL(ac97_init); -EXPORT_SYMBOL(ac97_set_values); -EXPORT_SYMBOL(ac97_put_register); -EXPORT_SYMBOL(ac97_mixer_ioctl); -MODULE_LICENSE("GPL"); - - -/* - * Local variables: - * c-basic-offset: 4 - * End: - */ |