diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/drivers/opl3/opl3_oss.c | 250 |
1 files changed, 250 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..7bf0d5f3f --- /dev/null +++ b/sound/drivers/opl3/opl3_oss.c @@ -0,0 +1,250 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Interface for OSS sequencer emulation + * + * Copyright (C) 2000 Uros Bizjak <uros@kss-loka.si> + */ + +#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); + +/* operators */ + +static const 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) +{ + if (snd_BUG_ON(!arg)) + return -ENXIO; + 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) +{ + if (snd_BUG_ON(!arg)) + return -ENXIO; + + return 0; +} |