1 files changed, 283 insertions, 0 deletions
diff --git a/sound/drivers/opl3/opl3_oss.c b/sound/drivers/opl3/opl3_oss.c
new file mode 100644
index 0000000..9a2271d
--- /dev/null
+++ b/sound/drivers/opl3/opl3_oss.c
@@ -0,0 +1,283 @@
+/*
+ *  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 "opl3_voice.h"
+#include <linux/slab.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("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("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("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;
+}