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path: root/sound/core/seq/instr/ainstr_iw.c
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Diffstat (limited to 'sound/core/seq/instr/ainstr_iw.c')
-rw-r--r--sound/core/seq/instr/ainstr_iw.c622
1 files changed, 622 insertions, 0 deletions
diff --git a/sound/core/seq/instr/ainstr_iw.c b/sound/core/seq/instr/ainstr_iw.c
new file mode 100644
index 000000000000..39ff72b2aab3
--- /dev/null
+++ b/sound/core/seq/instr/ainstr_iw.c
@@ -0,0 +1,622 @@
+/*
+ * IWFFFF - AMD InterWave (tm) - Instrument routines
+ * Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/ainstr_iw.h>
+#include <sound/initval.h>
+#include <asm/uaccess.h>
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
+MODULE_DESCRIPTION("Advanced Linux Sound Architecture IWFFFF support.");
+MODULE_LICENSE("GPL");
+
+static unsigned int snd_seq_iwffff_size(unsigned int size, unsigned int format)
+{
+ unsigned int result = size;
+
+ if (format & IWFFFF_WAVE_16BIT)
+ result <<= 1;
+ if (format & IWFFFF_WAVE_STEREO)
+ result <<= 1;
+ return result;
+}
+
+static void snd_seq_iwffff_copy_lfo_from_stream(iwffff_lfo_t *fp,
+ iwffff_xlfo_t *fx)
+{
+ fp->freq = le16_to_cpu(fx->freq);
+ fp->depth = le16_to_cpu(fx->depth);
+ fp->sweep = le16_to_cpu(fx->sweep);
+ fp->shape = fx->shape;
+ fp->delay = fx->delay;
+}
+
+static int snd_seq_iwffff_copy_env_from_stream(__u32 req_stype,
+ iwffff_layer_t *lp,
+ iwffff_env_t *ep,
+ iwffff_xenv_t *ex,
+ char __user **data,
+ long *len,
+ int gfp_mask)
+{
+ __u32 stype;
+ iwffff_env_record_t *rp, *rp_last;
+ iwffff_xenv_record_t rx;
+ iwffff_env_point_t *pp;
+ iwffff_xenv_point_t px;
+ int points_size, idx;
+
+ ep->flags = ex->flags;
+ ep->mode = ex->mode;
+ ep->index = ex->index;
+ rp_last = NULL;
+ while (1) {
+ if (*len < (long)sizeof(__u32))
+ return -EINVAL;
+ if (copy_from_user(&stype, *data, sizeof(stype)))
+ return -EFAULT;
+ if (stype == IWFFFF_STRU_WAVE)
+ return 0;
+ if (req_stype != stype) {
+ if (stype == IWFFFF_STRU_ENV_RECP ||
+ stype == IWFFFF_STRU_ENV_RECV)
+ return 0;
+ }
+ if (*len < (long)sizeof(rx))
+ return -EINVAL;
+ if (copy_from_user(&rx, *data, sizeof(rx)))
+ return -EFAULT;
+ *data += sizeof(rx);
+ *len -= sizeof(rx);
+ points_size = (le16_to_cpu(rx.nattack) + le16_to_cpu(rx.nrelease)) * 2 * sizeof(__u16);
+ if (points_size > *len)
+ return -EINVAL;
+ rp = kcalloc(1, sizeof(*rp) + points_size, gfp_mask);
+ if (rp == NULL)
+ return -ENOMEM;
+ rp->nattack = le16_to_cpu(rx.nattack);
+ rp->nrelease = le16_to_cpu(rx.nrelease);
+ rp->sustain_offset = le16_to_cpu(rx.sustain_offset);
+ rp->sustain_rate = le16_to_cpu(rx.sustain_rate);
+ rp->release_rate = le16_to_cpu(rx.release_rate);
+ rp->hirange = rx.hirange;
+ pp = (iwffff_env_point_t *)(rp + 1);
+ for (idx = 0; idx < rp->nattack + rp->nrelease; idx++) {
+ if (copy_from_user(&px, *data, sizeof(px)))
+ return -EFAULT;
+ *data += sizeof(px);
+ *len -= sizeof(px);
+ pp->offset = le16_to_cpu(px.offset);
+ pp->rate = le16_to_cpu(px.rate);
+ }
+ if (ep->record == NULL) {
+ ep->record = rp;
+ } else {
+ rp_last = rp;
+ }
+ rp_last = rp;
+ }
+ return 0;
+}
+
+static int snd_seq_iwffff_copy_wave_from_stream(snd_iwffff_ops_t *ops,
+ iwffff_layer_t *lp,
+ char __user **data,
+ long *len,
+ int atomic)
+{
+ iwffff_wave_t *wp, *prev;
+ iwffff_xwave_t xp;
+ int err, gfp_mask;
+ unsigned int real_size;
+
+ gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
+ if (*len < (long)sizeof(xp))
+ return -EINVAL;
+ if (copy_from_user(&xp, *data, sizeof(xp)))
+ return -EFAULT;
+ *data += sizeof(xp);
+ *len -= sizeof(xp);
+ wp = kcalloc(1, sizeof(*wp), gfp_mask);
+ if (wp == NULL)
+ return -ENOMEM;
+ wp->share_id[0] = le32_to_cpu(xp.share_id[0]);
+ wp->share_id[1] = le32_to_cpu(xp.share_id[1]);
+ wp->share_id[2] = le32_to_cpu(xp.share_id[2]);
+ wp->share_id[3] = le32_to_cpu(xp.share_id[3]);
+ wp->format = le32_to_cpu(xp.format);
+ wp->address.memory = le32_to_cpu(xp.offset);
+ wp->size = le32_to_cpu(xp.size);
+ wp->start = le32_to_cpu(xp.start);
+ wp->loop_start = le32_to_cpu(xp.loop_start);
+ wp->loop_end = le32_to_cpu(xp.loop_end);
+ wp->loop_repeat = le16_to_cpu(xp.loop_repeat);
+ wp->sample_ratio = le32_to_cpu(xp.sample_ratio);
+ wp->attenuation = xp.attenuation;
+ wp->low_note = xp.low_note;
+ wp->high_note = xp.high_note;
+ real_size = snd_seq_iwffff_size(wp->size, wp->format);
+ if (!(wp->format & IWFFFF_WAVE_ROM)) {
+ if ((long)real_size > *len) {
+ kfree(wp);
+ return -ENOMEM;
+ }
+ }
+ if (ops->put_sample) {
+ err = ops->put_sample(ops->private_data, wp,
+ *data, real_size, atomic);
+ if (err < 0) {
+ kfree(wp);
+ return err;
+ }
+ }
+ if (!(wp->format & IWFFFF_WAVE_ROM)) {
+ *data += real_size;
+ *len -= real_size;
+ }
+ prev = lp->wave;
+ if (prev) {
+ while (prev->next) prev = prev->next;
+ prev->next = wp;
+ } else {
+ lp->wave = wp;
+ }
+ return 0;
+}
+
+static void snd_seq_iwffff_env_free(snd_iwffff_ops_t *ops,
+ iwffff_env_t *env,
+ int atomic)
+{
+ iwffff_env_record_t *rec;
+
+ while ((rec = env->record) != NULL) {
+ env->record = rec->next;
+ kfree(rec);
+ }
+}
+
+static void snd_seq_iwffff_wave_free(snd_iwffff_ops_t *ops,
+ iwffff_wave_t *wave,
+ int atomic)
+{
+ if (ops->remove_sample)
+ ops->remove_sample(ops->private_data, wave, atomic);
+ kfree(wave);
+}
+
+static void snd_seq_iwffff_instr_free(snd_iwffff_ops_t *ops,
+ iwffff_instrument_t *ip,
+ int atomic)
+{
+ iwffff_layer_t *layer;
+ iwffff_wave_t *wave;
+
+ while ((layer = ip->layer) != NULL) {
+ ip->layer = layer->next;
+ snd_seq_iwffff_env_free(ops, &layer->penv, atomic);
+ snd_seq_iwffff_env_free(ops, &layer->venv, atomic);
+ while ((wave = layer->wave) != NULL) {
+ layer->wave = wave->next;
+ snd_seq_iwffff_wave_free(ops, wave, atomic);
+ }
+ kfree(layer);
+ }
+}
+
+static int snd_seq_iwffff_put(void *private_data, snd_seq_kinstr_t *instr,
+ char __user *instr_data, long len, int atomic,
+ int cmd)
+{
+ snd_iwffff_ops_t *ops = (snd_iwffff_ops_t *)private_data;
+ iwffff_instrument_t *ip;
+ iwffff_xinstrument_t ix;
+ iwffff_layer_t *lp, *prev_lp;
+ iwffff_xlayer_t lx;
+ int err, gfp_mask;
+
+ if (cmd != SNDRV_SEQ_INSTR_PUT_CMD_CREATE)
+ return -EINVAL;
+ gfp_mask = atomic ? GFP_ATOMIC : GFP_KERNEL;
+ /* copy instrument data */
+ if (len < (long)sizeof(ix))
+ return -EINVAL;
+ if (copy_from_user(&ix, instr_data, sizeof(ix)))
+ return -EFAULT;
+ if (ix.stype != IWFFFF_STRU_INSTR)
+ return -EINVAL;
+ instr_data += sizeof(ix);
+ len -= sizeof(ix);
+ ip = (iwffff_instrument_t *)KINSTR_DATA(instr);
+ ip->exclusion = le16_to_cpu(ix.exclusion);
+ ip->layer_type = le16_to_cpu(ix.layer_type);
+ ip->exclusion_group = le16_to_cpu(ix.exclusion_group);
+ ip->effect1 = ix.effect1;
+ ip->effect1_depth = ix.effect1_depth;
+ ip->effect2 = ix.effect2;
+ ip->effect2_depth = ix.effect2_depth;
+ /* copy layers */
+ prev_lp = NULL;
+ while (len > 0) {
+ if (len < (long)sizeof(iwffff_xlayer_t)) {
+ snd_seq_iwffff_instr_free(ops, ip, atomic);
+ return -EINVAL;
+ }
+ if (copy_from_user(&lx, instr_data, sizeof(lx)))
+ return -EFAULT;
+ instr_data += sizeof(lx);
+ len -= sizeof(lx);
+ if (lx.stype != IWFFFF_STRU_LAYER) {
+ snd_seq_iwffff_instr_free(ops, ip, atomic);
+ return -EINVAL;
+ }
+ lp = kcalloc(1, sizeof(*lp), gfp_mask);
+ if (lp == NULL) {
+ snd_seq_iwffff_instr_free(ops, ip, atomic);
+ return -ENOMEM;
+ }
+ if (prev_lp) {
+ prev_lp->next = lp;
+ } else {
+ ip->layer = lp;
+ }
+ prev_lp = lp;
+ lp->flags = lx.flags;
+ lp->velocity_mode = lx.velocity_mode;
+ lp->layer_event = lx.layer_event;
+ lp->low_range = lx.low_range;
+ lp->high_range = lx.high_range;
+ lp->pan = lx.pan;
+ lp->pan_freq_scale = lx.pan_freq_scale;
+ lp->attenuation = lx.attenuation;
+ snd_seq_iwffff_copy_lfo_from_stream(&lp->tremolo, &lx.tremolo);
+ snd_seq_iwffff_copy_lfo_from_stream(&lp->vibrato, &lx.vibrato);
+ lp->freq_scale = le16_to_cpu(lx.freq_scale);
+ lp->freq_center = lx.freq_center;
+ err = snd_seq_iwffff_copy_env_from_stream(IWFFFF_STRU_ENV_RECP,
+ lp,
+ &lp->penv, &lx.penv,
+ &instr_data, &len,
+ gfp_mask);
+ if (err < 0) {
+ snd_seq_iwffff_instr_free(ops, ip, atomic);
+ return err;
+ }
+ err = snd_seq_iwffff_copy_env_from_stream(IWFFFF_STRU_ENV_RECV,
+ lp,
+ &lp->venv, &lx.venv,
+ &instr_data, &len,
+ gfp_mask);
+ if (err < 0) {
+ snd_seq_iwffff_instr_free(ops, ip, atomic);
+ return err;
+ }
+ while (len > (long)sizeof(__u32)) {
+ __u32 stype;
+
+ if (copy_from_user(&stype, instr_data, sizeof(stype)))
+ return -EFAULT;
+ if (stype != IWFFFF_STRU_WAVE)
+ break;
+ err = snd_seq_iwffff_copy_wave_from_stream(ops,
+ lp,
+ &instr_data,
+ &len,
+ atomic);
+ if (err < 0) {
+ snd_seq_iwffff_instr_free(ops, ip, atomic);
+ return err;
+ }
+ }
+ }
+ return 0;
+}
+
+static void snd_seq_iwffff_copy_lfo_to_stream(iwffff_xlfo_t *fx,
+ iwffff_lfo_t *fp)
+{
+ fx->freq = cpu_to_le16(fp->freq);
+ fx->depth = cpu_to_le16(fp->depth);
+ fx->sweep = cpu_to_le16(fp->sweep);
+ fp->shape = fx->shape;
+ fp->delay = fx->delay;
+}
+
+static int snd_seq_iwffff_copy_env_to_stream(__u32 req_stype,
+ iwffff_layer_t *lp,
+ iwffff_xenv_t *ex,
+ iwffff_env_t *ep,
+ char __user **data,
+ long *len)
+{
+ iwffff_env_record_t *rp;
+ iwffff_xenv_record_t rx;
+ iwffff_env_point_t *pp;
+ iwffff_xenv_point_t px;
+ int points_size, idx;
+
+ ex->flags = ep->flags;
+ ex->mode = ep->mode;
+ ex->index = ep->index;
+ for (rp = ep->record; rp; rp = rp->next) {
+ if (*len < (long)sizeof(rx))
+ return -ENOMEM;
+ memset(&rx, 0, sizeof(rx));
+ rx.stype = req_stype;
+ rx.nattack = cpu_to_le16(rp->nattack);
+ rx.nrelease = cpu_to_le16(rp->nrelease);
+ rx.sustain_offset = cpu_to_le16(rp->sustain_offset);
+ rx.sustain_rate = cpu_to_le16(rp->sustain_rate);
+ rx.release_rate = cpu_to_le16(rp->release_rate);
+ rx.hirange = cpu_to_le16(rp->hirange);
+ if (copy_to_user(*data, &rx, sizeof(rx)))
+ return -EFAULT;
+ *data += sizeof(rx);
+ *len -= sizeof(rx);
+ points_size = (rp->nattack + rp->nrelease) * 2 * sizeof(__u16);
+ if (*len < points_size)
+ return -ENOMEM;
+ pp = (iwffff_env_point_t *)(rp + 1);
+ for (idx = 0; idx < rp->nattack + rp->nrelease; idx++) {
+ px.offset = cpu_to_le16(pp->offset);
+ px.rate = cpu_to_le16(pp->rate);
+ if (copy_to_user(*data, &px, sizeof(px)))
+ return -EFAULT;
+ *data += sizeof(px);
+ *len -= sizeof(px);
+ }
+ }
+ return 0;
+}
+
+static int snd_seq_iwffff_copy_wave_to_stream(snd_iwffff_ops_t *ops,
+ iwffff_layer_t *lp,
+ char __user **data,
+ long *len,
+ int atomic)
+{
+ iwffff_wave_t *wp;
+ iwffff_xwave_t xp;
+ int err;
+ unsigned int real_size;
+
+ for (wp = lp->wave; wp; wp = wp->next) {
+ if (*len < (long)sizeof(xp))
+ return -ENOMEM;
+ memset(&xp, 0, sizeof(xp));
+ xp.stype = IWFFFF_STRU_WAVE;
+ xp.share_id[0] = cpu_to_le32(wp->share_id[0]);
+ xp.share_id[1] = cpu_to_le32(wp->share_id[1]);
+ xp.share_id[2] = cpu_to_le32(wp->share_id[2]);
+ xp.share_id[3] = cpu_to_le32(wp->share_id[3]);
+ xp.format = cpu_to_le32(wp->format);
+ if (wp->format & IWFFFF_WAVE_ROM)
+ xp.offset = cpu_to_le32(wp->address.memory);
+ xp.size = cpu_to_le32(wp->size);
+ xp.start = cpu_to_le32(wp->start);
+ xp.loop_start = cpu_to_le32(wp->loop_start);
+ xp.loop_end = cpu_to_le32(wp->loop_end);
+ xp.loop_repeat = cpu_to_le32(wp->loop_repeat);
+ xp.sample_ratio = cpu_to_le32(wp->sample_ratio);
+ xp.attenuation = wp->attenuation;
+ xp.low_note = wp->low_note;
+ xp.high_note = wp->high_note;
+ if (copy_to_user(*data, &xp, sizeof(xp)))
+ return -EFAULT;
+ *data += sizeof(xp);
+ *len -= sizeof(xp);
+ real_size = snd_seq_iwffff_size(wp->size, wp->format);
+ if (!(wp->format & IWFFFF_WAVE_ROM)) {
+ if (*len < (long)real_size)
+ return -ENOMEM;
+ }
+ if (ops->get_sample) {
+ err = ops->get_sample(ops->private_data, wp,
+ *data, real_size, atomic);
+ if (err < 0)
+ return err;
+ }
+ if (!(wp->format & IWFFFF_WAVE_ROM)) {
+ *data += real_size;
+ *len -= real_size;
+ }
+ }
+ return 0;
+}
+
+static int snd_seq_iwffff_get(void *private_data, snd_seq_kinstr_t *instr,
+ char __user *instr_data, long len, int atomic, int cmd)
+{
+ snd_iwffff_ops_t *ops = (snd_iwffff_ops_t *)private_data;
+ iwffff_instrument_t *ip;
+ iwffff_xinstrument_t ix;
+ iwffff_layer_t *lp;
+ iwffff_xlayer_t lx;
+ char __user *layer_instr_data;
+ int err;
+
+ if (cmd != SNDRV_SEQ_INSTR_GET_CMD_FULL)
+ return -EINVAL;
+ if (len < (long)sizeof(ix))
+ return -ENOMEM;
+ memset(&ix, 0, sizeof(ix));
+ ip = (iwffff_instrument_t *)KINSTR_DATA(instr);
+ ix.stype = IWFFFF_STRU_INSTR;
+ ix.exclusion = cpu_to_le16(ip->exclusion);
+ ix.layer_type = cpu_to_le16(ip->layer_type);
+ ix.exclusion_group = cpu_to_le16(ip->exclusion_group);
+ ix.effect1 = cpu_to_le16(ip->effect1);
+ ix.effect1_depth = cpu_to_le16(ip->effect1_depth);
+ ix.effect2 = ip->effect2;
+ ix.effect2_depth = ip->effect2_depth;
+ if (copy_to_user(instr_data, &ix, sizeof(ix)))
+ return -EFAULT;
+ instr_data += sizeof(ix);
+ len -= sizeof(ix);
+ for (lp = ip->layer; lp; lp = lp->next) {
+ if (len < (long)sizeof(lx))
+ return -ENOMEM;
+ memset(&lx, 0, sizeof(lx));
+ lx.stype = IWFFFF_STRU_LAYER;
+ lx.flags = lp->flags;
+ lx.velocity_mode = lp->velocity_mode;
+ lx.layer_event = lp->layer_event;
+ lx.low_range = lp->low_range;
+ lx.high_range = lp->high_range;
+ lx.pan = lp->pan;
+ lx.pan_freq_scale = lp->pan_freq_scale;
+ lx.attenuation = lp->attenuation;
+ snd_seq_iwffff_copy_lfo_to_stream(&lx.tremolo, &lp->tremolo);
+ snd_seq_iwffff_copy_lfo_to_stream(&lx.vibrato, &lp->vibrato);
+ layer_instr_data = instr_data;
+ instr_data += sizeof(lx);
+ len -= sizeof(lx);
+ err = snd_seq_iwffff_copy_env_to_stream(IWFFFF_STRU_ENV_RECP,
+ lp,
+ &lx.penv, &lp->penv,
+ &instr_data, &len);
+ if (err < 0)
+ return err;
+ err = snd_seq_iwffff_copy_env_to_stream(IWFFFF_STRU_ENV_RECV,
+ lp,
+ &lx.venv, &lp->venv,
+ &instr_data, &len);
+ if (err < 0)
+ return err;
+ /* layer structure updating is now finished */
+ if (copy_to_user(layer_instr_data, &lx, sizeof(lx)))
+ return -EFAULT;
+ err = snd_seq_iwffff_copy_wave_to_stream(ops,
+ lp,
+ &instr_data,
+ &len,
+ atomic);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+
+static long snd_seq_iwffff_env_size_in_stream(iwffff_env_t *ep)
+{
+ long result = 0;
+ iwffff_env_record_t *rp;
+
+ for (rp = ep->record; rp; rp = rp->next) {
+ result += sizeof(iwffff_xenv_record_t);
+ result += (rp->nattack + rp->nrelease) * 2 * sizeof(__u16);
+ }
+ return 0;
+}
+
+static long snd_seq_iwffff_wave_size_in_stream(iwffff_layer_t *lp)
+{
+ long result = 0;
+ iwffff_wave_t *wp;
+
+ for (wp = lp->wave; wp; wp = wp->next) {
+ result += sizeof(iwffff_xwave_t);
+ if (!(wp->format & IWFFFF_WAVE_ROM))
+ result += wp->size;
+ }
+ return result;
+}
+
+static int snd_seq_iwffff_get_size(void *private_data, snd_seq_kinstr_t *instr,
+ long *size)
+{
+ long result;
+ iwffff_instrument_t *ip;
+ iwffff_layer_t *lp;
+
+ *size = 0;
+ ip = (iwffff_instrument_t *)KINSTR_DATA(instr);
+ result = sizeof(iwffff_xinstrument_t);
+ for (lp = ip->layer; lp; lp = lp->next) {
+ result += sizeof(iwffff_xlayer_t);
+ result += snd_seq_iwffff_env_size_in_stream(&lp->penv);
+ result += snd_seq_iwffff_env_size_in_stream(&lp->venv);
+ result += snd_seq_iwffff_wave_size_in_stream(lp);
+ }
+ *size = result;
+ return 0;
+}
+
+static int snd_seq_iwffff_remove(void *private_data,
+ snd_seq_kinstr_t *instr,
+ int atomic)
+{
+ snd_iwffff_ops_t *ops = (snd_iwffff_ops_t *)private_data;
+ iwffff_instrument_t *ip;
+
+ ip = (iwffff_instrument_t *)KINSTR_DATA(instr);
+ snd_seq_iwffff_instr_free(ops, ip, atomic);
+ return 0;
+}
+
+static void snd_seq_iwffff_notify(void *private_data,
+ snd_seq_kinstr_t *instr,
+ int what)
+{
+ snd_iwffff_ops_t *ops = (snd_iwffff_ops_t *)private_data;
+
+ if (ops->notify)
+ ops->notify(ops->private_data, instr, what);
+}
+
+int snd_seq_iwffff_init(snd_iwffff_ops_t *ops,
+ void *private_data,
+ snd_seq_kinstr_ops_t *next)
+{
+ memset(ops, 0, sizeof(*ops));
+ ops->private_data = private_data;
+ ops->kops.private_data = ops;
+ ops->kops.add_len = sizeof(iwffff_instrument_t);
+ ops->kops.instr_type = SNDRV_SEQ_INSTR_ID_INTERWAVE;
+ ops->kops.put = snd_seq_iwffff_put;
+ ops->kops.get = snd_seq_iwffff_get;
+ ops->kops.get_size = snd_seq_iwffff_get_size;
+ ops->kops.remove = snd_seq_iwffff_remove;
+ ops->kops.notify = snd_seq_iwffff_notify;
+ ops->kops.next = next;
+ return 0;
+}
+
+/*
+ * Init part
+ */
+
+static int __init alsa_ainstr_iw_init(void)
+{
+ return 0;
+}
+
+static void __exit alsa_ainstr_iw_exit(void)
+{
+}
+
+module_init(alsa_ainstr_iw_init)
+module_exit(alsa_ainstr_iw_exit)
+
+EXPORT_SYMBOL(snd_seq_iwffff_init);