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Diffstat (limited to 'sound/drivers/opl3/opl3_oss.c')
-rw-r--r--sound/drivers/opl3/opl3_oss.c285
1 files changed, 285 insertions, 0 deletions
diff --git a/sound/drivers/opl3/opl3_oss.c b/sound/drivers/opl3/opl3_oss.c
new file mode 100644
index 000000000..c1cb249ac
--- /dev/null
+++ b/sound/drivers/opl3/opl3_oss.c
@@ -0,0 +1,285 @@
+/*
+ * Interface for OSS sequencer emulation
+ *
+ * Copyright (C) 2000 Uros Bizjak <uros@kss-loka.si>
+ *
+ * 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 <linux/export.h>
+#include "opl3_voice.h"
+
+static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure);
+static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg);
+static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg);
+static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count);
+static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg);
+
+/* */
+
+static inline mm_segment_t snd_enter_user(void)
+{
+ mm_segment_t fs = get_fs();
+ set_fs(get_ds());
+ return fs;
+}
+
+static inline void snd_leave_user(mm_segment_t fs)
+{
+ set_fs(fs);
+}
+
+/* operators */
+
+extern struct snd_midi_op opl3_ops;
+
+static struct snd_seq_oss_callback oss_callback = {
+ .owner = THIS_MODULE,
+ .open = snd_opl3_open_seq_oss,
+ .close = snd_opl3_close_seq_oss,
+ .ioctl = snd_opl3_ioctl_seq_oss,
+ .load_patch = snd_opl3_load_patch_seq_oss,
+ .reset = snd_opl3_reset_seq_oss,
+};
+
+static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct,
+ void *private_data, int atomic, int hop)
+{
+ struct snd_opl3 *opl3 = private_data;
+
+ if (ev->type != SNDRV_SEQ_EVENT_OSS)
+ snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset);
+ return 0;
+}
+
+/* ------------------------------ */
+
+static void snd_opl3_oss_free_port(void *private_data)
+{
+ struct snd_opl3 *opl3 = private_data;
+
+ snd_midi_channel_free_set(opl3->oss_chset);
+}
+
+static int snd_opl3_oss_create_port(struct snd_opl3 * opl3)
+{
+ struct snd_seq_port_callback callbacks;
+ char name[32];
+ int voices, opl_ver;
+
+ voices = (opl3->hardware < OPL3_HW_OPL3) ?
+ MAX_OPL2_VOICES : MAX_OPL3_VOICES;
+ opl3->oss_chset = snd_midi_channel_alloc_set(voices);
+ if (opl3->oss_chset == NULL)
+ return -ENOMEM;
+ opl3->oss_chset->private_data = opl3;
+
+ memset(&callbacks, 0, sizeof(callbacks));
+ callbacks.owner = THIS_MODULE;
+ callbacks.event_input = snd_opl3_oss_event_input;
+ callbacks.private_free = snd_opl3_oss_free_port;
+ callbacks.private_data = opl3;
+
+ opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
+ sprintf(name, "OPL%i OSS Port", opl_ver);
+
+ opl3->oss_chset->client = opl3->seq_client;
+ opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
+ SNDRV_SEQ_PORT_CAP_WRITE,
+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
+ SNDRV_SEQ_PORT_TYPE_MIDI_GM |
+ SNDRV_SEQ_PORT_TYPE_HARDWARE |
+ SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
+ voices, voices,
+ name);
+ if (opl3->oss_chset->port < 0) {
+ int port;
+ port = opl3->oss_chset->port;
+ snd_midi_channel_free_set(opl3->oss_chset);
+ return port;
+ }
+ return 0;
+}
+
+/* ------------------------------ */
+
+/* register OSS synth */
+void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name)
+{
+ struct snd_seq_oss_reg *arg;
+ struct snd_seq_device *dev;
+
+ if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS,
+ sizeof(struct snd_seq_oss_reg), &dev) < 0)
+ return;
+
+ opl3->oss_seq_dev = dev;
+ strlcpy(dev->name, name, sizeof(dev->name));
+ arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
+ arg->type = SYNTH_TYPE_FM;
+ if (opl3->hardware < OPL3_HW_OPL3) {
+ arg->subtype = FM_TYPE_ADLIB;
+ arg->nvoices = MAX_OPL2_VOICES;
+ } else {
+ arg->subtype = FM_TYPE_OPL3;
+ arg->nvoices = MAX_OPL3_VOICES;
+ }
+ arg->oper = oss_callback;
+ arg->private_data = opl3;
+
+ if (snd_opl3_oss_create_port(opl3)) {
+ /* register to OSS synth table */
+ snd_device_register(opl3->card, dev);
+ }
+}
+
+/* unregister */
+void snd_opl3_free_seq_oss(struct snd_opl3 *opl3)
+{
+ if (opl3->oss_seq_dev) {
+ /* The instance should have been released in prior */
+ opl3->oss_seq_dev = NULL;
+ }
+}
+
+/* ------------------------------ */
+
+/* open OSS sequencer */
+static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
+{
+ struct snd_opl3 *opl3 = closure;
+ int err;
+
+ if (snd_BUG_ON(!arg))
+ return -ENXIO;
+
+ if ((err = snd_opl3_synth_setup(opl3)) < 0)
+ return err;
+
+ /* fill the argument data */
+ arg->private_data = opl3;
+ arg->addr.client = opl3->oss_chset->client;
+ arg->addr.port = opl3->oss_chset->port;
+
+ if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
+ return err;
+
+ opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH;
+ return 0;
+}
+
+/* close OSS sequencer */
+static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg)
+{
+ struct snd_opl3 *opl3;
+
+ if (snd_BUG_ON(!arg))
+ return -ENXIO;
+ opl3 = arg->private_data;
+
+ snd_opl3_synth_cleanup(opl3);
+
+ snd_opl3_synth_use_dec(opl3);
+ return 0;
+}
+
+/* load patch */
+
+/* from sound_config.h */
+#define SBFM_MAXINSTR 256
+
+static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
+ const char __user *buf, int offs, int count)
+{
+ struct snd_opl3 *opl3;
+ struct sbi_instrument sbi;
+ char name[32];
+ int err, type;
+
+ if (snd_BUG_ON(!arg))
+ return -ENXIO;
+ opl3 = arg->private_data;
+
+ if (format == FM_PATCH)
+ type = FM_PATCH_OPL2;
+ else if (format == OPL3_PATCH)
+ type = FM_PATCH_OPL3;
+ else
+ return -EINVAL;
+
+ if (count < (int)sizeof(sbi)) {
+ snd_printk(KERN_ERR "FM Error: Patch record too short\n");
+ return -EINVAL;
+ }
+ if (copy_from_user(&sbi, buf, sizeof(sbi)))
+ return -EFAULT;
+
+ if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) {
+ snd_printk(KERN_ERR "FM Error: Invalid instrument number %d\n",
+ sbi.channel);
+ return -EINVAL;
+ }
+
+ memset(name, 0, sizeof(name));
+ sprintf(name, "Chan%d", sbi.channel);
+
+ err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL,
+ sbi.operators);
+ if (err < 0)
+ return err;
+
+ return sizeof(sbi);
+}
+
+/* ioctl */
+static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
+ unsigned long ioarg)
+{
+ struct snd_opl3 *opl3;
+
+ if (snd_BUG_ON(!arg))
+ return -ENXIO;
+ opl3 = arg->private_data;
+ switch (cmd) {
+ case SNDCTL_FM_LOAD_INSTR:
+ snd_printk(KERN_ERR "OPL3: "
+ "Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. "
+ "Fix the program.\n");
+ return -EINVAL;
+
+ case SNDCTL_SYNTH_MEMAVL:
+ return 0x7fffffff;
+
+ case SNDCTL_FM_4OP_ENABLE:
+ // handled automatically by OPL instrument type
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/* reset device */
+static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg)
+{
+ struct snd_opl3 *opl3;
+
+ if (snd_BUG_ON(!arg))
+ return -ENXIO;
+ opl3 = arg->private_data;
+
+ return 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-06 07:42:31 +0000