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-rw-r--r--sound/firewire/oxfw/oxfw-spkr.c319
1 files changed, 319 insertions, 0 deletions
diff --git a/sound/firewire/oxfw/oxfw-spkr.c b/sound/firewire/oxfw/oxfw-spkr.c
new file mode 100644
index 000000000000..cb905af0660d
--- /dev/null
+++ b/sound/firewire/oxfw/oxfw-spkr.c
@@ -0,0 +1,319 @@
+/*
+ * oxfw-spkr.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"
+
+struct fw_spkr {
+ bool mute;
+ s16 volume[6];
+ s16 volume_min;
+ s16 volume_max;
+
+ unsigned int mixer_channels;
+ u8 mute_fb_id;
+ u8 volume_fb_id;
+};
+
+enum control_action { CTL_READ, CTL_WRITE };
+enum control_attribute {
+ CTL_MIN = 0x02,
+ CTL_MAX = 0x03,
+ CTL_CURRENT = 0x10,
+};
+
+static int avc_audio_feature_mute(struct fw_unit *unit, u8 fb_id, 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] = 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(unit, buf, 11, buf, 11, 0x3fe);
+ if (err < 0)
+ goto error;
+ if (err < 11) {
+ dev_err(&unit->device, "short FCP response\n");
+ err = -EIO;
+ goto error;
+ }
+ if (buf[0] != response_ok) {
+ dev_err(&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 avc_audio_feature_volume(struct fw_unit *unit, u8 fb_id, 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] = 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(unit, buf, 12, buf, 12, 0x3fe);
+ if (err < 0)
+ goto error;
+ if (err < 12) {
+ dev_err(&unit->device, "short FCP response\n");
+ err = -EIO;
+ goto error;
+ }
+ if (buf[0] != response_ok) {
+ dev_err(&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 spkr_mute_get(struct snd_kcontrol *control,
+ struct snd_ctl_elem_value *value)
+{
+ struct snd_oxfw *oxfw = control->private_data;
+ struct fw_spkr *spkr = oxfw->spec;
+
+ value->value.integer.value[0] = !spkr->mute;
+
+ return 0;
+}
+
+static int spkr_mute_put(struct snd_kcontrol *control,
+ struct snd_ctl_elem_value *value)
+{
+ struct snd_oxfw *oxfw = control->private_data;
+ struct fw_spkr *spkr = oxfw->spec;
+ bool mute;
+ int err;
+
+ mute = !value->value.integer.value[0];
+
+ if (mute == spkr->mute)
+ return 0;
+
+ err = avc_audio_feature_mute(oxfw->unit, spkr->mute_fb_id, &mute,
+ CTL_WRITE);
+ if (err < 0)
+ return err;
+ spkr->mute = mute;
+
+ return 1;
+}
+
+static int spkr_volume_info(struct snd_kcontrol *control,
+ struct snd_ctl_elem_info *info)
+{
+ struct snd_oxfw *oxfw = control->private_data;
+ struct fw_spkr *spkr = oxfw->spec;
+
+ info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ info->count = spkr->mixer_channels;
+ info->value.integer.min = spkr->volume_min;
+ info->value.integer.max = spkr->volume_max;
+
+ return 0;
+}
+
+static const u8 channel_map[6] = { 0, 1, 4, 5, 2, 3 };
+
+static int spkr_volume_get(struct snd_kcontrol *control,
+ struct snd_ctl_elem_value *value)
+{
+ struct snd_oxfw *oxfw = control->private_data;
+ struct fw_spkr *spkr = oxfw->spec;
+ unsigned int i;
+
+ for (i = 0; i < spkr->mixer_channels; ++i)
+ value->value.integer.value[channel_map[i]] = spkr->volume[i];
+
+ return 0;
+}
+
+static int spkr_volume_put(struct snd_kcontrol *control,
+ struct snd_ctl_elem_value *value)
+{
+ struct snd_oxfw *oxfw = control->private_data;
+ struct fw_spkr *spkr = oxfw->spec;
+ unsigned int i, changed_channels;
+ bool equal_values = true;
+ s16 volume;
+ int err;
+
+ for (i = 0; i < spkr->mixer_channels; ++i) {
+ if (value->value.integer.value[i] < spkr->volume_min ||
+ value->value.integer.value[i] > spkr->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 < spkr->mixer_channels; ++i)
+ if (value->value.integer.value[channel_map[i]] !=
+ spkr->volume[i])
+ changed_channels |= 1 << (i + 1);
+
+ if (equal_values && changed_channels != 0)
+ changed_channels = 1 << 0;
+
+ for (i = 0; i <= spkr->mixer_channels; ++i) {
+ volume = value->value.integer.value[channel_map[i ? i - 1 : 0]];
+ if (changed_channels & (1 << i)) {
+ err = avc_audio_feature_volume(oxfw->unit,
+ spkr->volume_fb_id, &volume,
+ i, CTL_CURRENT, CTL_WRITE);
+ if (err < 0)
+ return err;
+ }
+ if (i > 0)
+ spkr->volume[i - 1] = volume;
+ }
+
+ return changed_channels != 0;
+}
+
+int snd_oxfw_add_spkr(struct snd_oxfw *oxfw, bool is_lacie)
+{
+ static const struct snd_kcontrol_new controls[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Switch",
+ .info = snd_ctl_boolean_mono_info,
+ .get = spkr_mute_get,
+ .put = spkr_mute_put,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Volume",
+ .info = spkr_volume_info,
+ .get = spkr_volume_get,
+ .put = spkr_volume_put,
+ },
+ };
+ struct fw_spkr *spkr;
+ unsigned int i, first_ch;
+ int err;
+
+ spkr = kzalloc(sizeof(struct fw_spkr), GFP_KERNEL);
+ if (spkr == NULL)
+ return -ENOMEM;
+ oxfw->spec = spkr;
+
+ if (is_lacie) {
+ spkr->mixer_channels = 1;
+ spkr->mute_fb_id = 0x01;
+ spkr->volume_fb_id = 0x01;
+ } else {
+ spkr->mixer_channels = 6;
+ spkr->mute_fb_id = 0x01;
+ spkr->volume_fb_id = 0x02;
+ }
+
+ err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
+ &spkr->volume_min, 0, CTL_MIN, CTL_READ);
+ if (err < 0)
+ return err;
+ err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
+ &spkr->volume_max, 0, CTL_MAX, CTL_READ);
+ if (err < 0)
+ return err;
+
+ err = avc_audio_feature_mute(oxfw->unit, spkr->mute_fb_id, &spkr->mute,
+ CTL_READ);
+ if (err < 0)
+ return err;
+
+ first_ch = spkr->mixer_channels == 1 ? 0 : 1;
+ for (i = 0; i < spkr->mixer_channels; ++i) {
+ err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
+ &spkr->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;
+}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.