diff options
Diffstat (limited to 'kernel/sound/firewire/oxfw/oxfw-control.c')
| -rw-r--r-- | kernel/sound/firewire/oxfw/oxfw-control.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/kernel/sound/firewire/oxfw/oxfw-control.c b/kernel/sound/firewire/oxfw/oxfw-control.c new file mode 100644 index 000000000..02a1cb90f --- /dev/null +++ b/kernel/sound/firewire/oxfw/oxfw-control.c @@ -0,0 +1,283 @@ +/* + * oxfw_stream.c - a part of driver for OXFW970/971 based devices + * + * Copyright (c) Clemens Ladisch <clemens@ladisch.de> + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include "oxfw.h" + +enum control_action { CTL_READ, CTL_WRITE }; +enum control_attribute { + CTL_MIN = 0x02, + CTL_MAX = 0x03, + CTL_CURRENT = 0x10, +}; + +static int oxfw_mute_command(struct snd_oxfw *oxfw, bool *value, + enum control_action action) +{ + u8 *buf; + u8 response_ok; + int err; + + buf = kmalloc(11, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + if (action == CTL_READ) { + buf[0] = 0x01; /* AV/C, STATUS */ + response_ok = 0x0c; /* STABLE */ + } else { + buf[0] = 0x00; /* AV/C, CONTROL */ + response_ok = 0x09; /* ACCEPTED */ + } + buf[1] = 0x08; /* audio unit 0 */ + buf[2] = 0xb8; /* FUNCTION BLOCK */ + buf[3] = 0x81; /* function block type: feature */ + buf[4] = oxfw->device_info->mute_fb_id; /* function block ID */ + buf[5] = 0x10; /* control attribute: current */ + buf[6] = 0x02; /* selector length */ + buf[7] = 0x00; /* audio channel number */ + buf[8] = 0x01; /* control selector: mute */ + buf[9] = 0x01; /* control data length */ + if (action == CTL_READ) + buf[10] = 0xff; + else + buf[10] = *value ? 0x70 : 0x60; + + err = fcp_avc_transaction(oxfw->unit, buf, 11, buf, 11, 0x3fe); + if (err < 0) + goto error; + if (err < 11) { + dev_err(&oxfw->unit->device, "short FCP response\n"); + err = -EIO; + goto error; + } + if (buf[0] != response_ok) { + dev_err(&oxfw->unit->device, "mute command failed\n"); + err = -EIO; + goto error; + } + if (action == CTL_READ) + *value = buf[10] == 0x70; + + err = 0; + +error: + kfree(buf); + + return err; +} + +static int oxfw_volume_command(struct snd_oxfw *oxfw, s16 *value, + unsigned int channel, + enum control_attribute attribute, + enum control_action action) +{ + u8 *buf; + u8 response_ok; + int err; + + buf = kmalloc(12, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + if (action == CTL_READ) { + buf[0] = 0x01; /* AV/C, STATUS */ + response_ok = 0x0c; /* STABLE */ + } else { + buf[0] = 0x00; /* AV/C, CONTROL */ + response_ok = 0x09; /* ACCEPTED */ + } + buf[1] = 0x08; /* audio unit 0 */ + buf[2] = 0xb8; /* FUNCTION BLOCK */ + buf[3] = 0x81; /* function block type: feature */ + buf[4] = oxfw->device_info->volume_fb_id; /* function block ID */ + buf[5] = attribute; /* control attribute */ + buf[6] = 0x02; /* selector length */ + buf[7] = channel; /* audio channel number */ + buf[8] = 0x02; /* control selector: volume */ + buf[9] = 0x02; /* control data length */ + if (action == CTL_READ) { + buf[10] = 0xff; + buf[11] = 0xff; + } else { + buf[10] = *value >> 8; + buf[11] = *value; + } + + err = fcp_avc_transaction(oxfw->unit, buf, 12, buf, 12, 0x3fe); + if (err < 0) + goto error; + if (err < 12) { + dev_err(&oxfw->unit->device, "short FCP response\n"); + err = -EIO; + goto error; + } + if (buf[0] != response_ok) { + dev_err(&oxfw->unit->device, "volume command failed\n"); + err = -EIO; + goto error; + } + if (action == CTL_READ) + *value = (buf[10] << 8) | buf[11]; + + err = 0; + +error: + kfree(buf); + + return err; +} + +static int oxfw_mute_get(struct snd_kcontrol *control, + struct snd_ctl_elem_value *value) +{ + struct snd_oxfw *oxfw = control->private_data; + + value->value.integer.value[0] = !oxfw->mute; + + return 0; +} + +static int oxfw_mute_put(struct snd_kcontrol *control, + struct snd_ctl_elem_value *value) +{ + struct snd_oxfw *oxfw = control->private_data; + bool mute; + int err; + + mute = !value->value.integer.value[0]; + + if (mute == oxfw->mute) + return 0; + + err = oxfw_mute_command(oxfw, &mute, CTL_WRITE); + if (err < 0) + return err; + oxfw->mute = mute; + + return 1; +} + +static int oxfw_volume_info(struct snd_kcontrol *control, + struct snd_ctl_elem_info *info) +{ + struct snd_oxfw *oxfw = control->private_data; + + info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + info->count = oxfw->device_info->mixer_channels; + info->value.integer.min = oxfw->volume_min; + info->value.integer.max = oxfw->volume_max; + + return 0; +} + +static const u8 channel_map[6] = { 0, 1, 4, 5, 2, 3 }; + +static int oxfw_volume_get(struct snd_kcontrol *control, + struct snd_ctl_elem_value *value) +{ + struct snd_oxfw *oxfw = control->private_data; + unsigned int i; + + for (i = 0; i < oxfw->device_info->mixer_channels; ++i) + value->value.integer.value[channel_map[i]] = oxfw->volume[i]; + + return 0; +} + +static int oxfw_volume_put(struct snd_kcontrol *control, + struct snd_ctl_elem_value *value) +{ + struct snd_oxfw *oxfw = control->private_data; + unsigned int i, changed_channels; + bool equal_values = true; + s16 volume; + int err; + + for (i = 0; i < oxfw->device_info->mixer_channels; ++i) { + if (value->value.integer.value[i] < oxfw->volume_min || + value->value.integer.value[i] > oxfw->volume_max) + return -EINVAL; + if (value->value.integer.value[i] != + value->value.integer.value[0]) + equal_values = false; + } + + changed_channels = 0; + for (i = 0; i < oxfw->device_info->mixer_channels; ++i) + if (value->value.integer.value[channel_map[i]] != + oxfw->volume[i]) + changed_channels |= 1 << (i + 1); + + if (equal_values && changed_channels != 0) + changed_channels = 1 << 0; + + for (i = 0; i <= oxfw->device_info->mixer_channels; ++i) { + volume = value->value.integer.value[channel_map[i ? i - 1 : 0]]; + if (changed_channels & (1 << i)) { + err = oxfw_volume_command(oxfw, &volume, i, + CTL_CURRENT, CTL_WRITE); + if (err < 0) + return err; + } + if (i > 0) + oxfw->volume[i - 1] = volume; + } + + return changed_channels != 0; +} + +int snd_oxfw_create_mixer(struct snd_oxfw *oxfw) +{ + static const struct snd_kcontrol_new controls[] = { + { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "PCM Playback Switch", + .info = snd_ctl_boolean_mono_info, + .get = oxfw_mute_get, + .put = oxfw_mute_put, + }, + { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "PCM Playback Volume", + .info = oxfw_volume_info, + .get = oxfw_volume_get, + .put = oxfw_volume_put, + }, + }; + unsigned int i, first_ch; + int err; + + err = oxfw_volume_command(oxfw, &oxfw->volume_min, + 0, CTL_MIN, CTL_READ); + if (err < 0) + return err; + err = oxfw_volume_command(oxfw, &oxfw->volume_max, + 0, CTL_MAX, CTL_READ); + if (err < 0) + return err; + + err = oxfw_mute_command(oxfw, &oxfw->mute, CTL_READ); + if (err < 0) + return err; + + first_ch = oxfw->device_info->mixer_channels == 1 ? 0 : 1; + for (i = 0; i < oxfw->device_info->mixer_channels; ++i) { + err = oxfw_volume_command(oxfw, &oxfw->volume[i], + first_ch + i, CTL_CURRENT, CTL_READ); + if (err < 0) + return err; + } + + for (i = 0; i < ARRAY_SIZE(controls); ++i) { + err = snd_ctl_add(oxfw->card, + snd_ctl_new1(&controls[i], oxfw)); + if (err < 0) + return err; + } + + return 0; +} |