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250 lines
6.0 KiB
250 lines
6.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Interface for OSS sequencer emulation |
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* |
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* Copyright (C) 2000 Uros Bizjak <[email protected]> |
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*/ |
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#include <linux/export.h> |
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#include "opl3_voice.h" |
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static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure); |
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static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg); |
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static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg); |
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static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count); |
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static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg); |
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/* operators */ |
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static const struct snd_seq_oss_callback oss_callback = { |
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.owner = THIS_MODULE, |
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.open = snd_opl3_open_seq_oss, |
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.close = snd_opl3_close_seq_oss, |
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.ioctl = snd_opl3_ioctl_seq_oss, |
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.load_patch = snd_opl3_load_patch_seq_oss, |
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.reset = snd_opl3_reset_seq_oss, |
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}; |
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static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct, |
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void *private_data, int atomic, int hop) |
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{ |
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struct snd_opl3 *opl3 = private_data; |
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if (ev->type != SNDRV_SEQ_EVENT_OSS) |
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snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset); |
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return 0; |
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} |
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/* ------------------------------ */ |
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static void snd_opl3_oss_free_port(void *private_data) |
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{ |
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struct snd_opl3 *opl3 = private_data; |
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snd_midi_channel_free_set(opl3->oss_chset); |
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} |
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static int snd_opl3_oss_create_port(struct snd_opl3 * opl3) |
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{ |
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struct snd_seq_port_callback callbacks; |
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char name[32]; |
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int voices, opl_ver; |
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voices = (opl3->hardware < OPL3_HW_OPL3) ? |
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MAX_OPL2_VOICES : MAX_OPL3_VOICES; |
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opl3->oss_chset = snd_midi_channel_alloc_set(voices); |
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if (opl3->oss_chset == NULL) |
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return -ENOMEM; |
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opl3->oss_chset->private_data = opl3; |
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memset(&callbacks, 0, sizeof(callbacks)); |
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callbacks.owner = THIS_MODULE; |
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callbacks.event_input = snd_opl3_oss_event_input; |
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callbacks.private_free = snd_opl3_oss_free_port; |
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callbacks.private_data = opl3; |
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opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8; |
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sprintf(name, "OPL%i OSS Port", opl_ver); |
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opl3->oss_chset->client = opl3->seq_client; |
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opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks, |
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SNDRV_SEQ_PORT_CAP_WRITE, |
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SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | |
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SNDRV_SEQ_PORT_TYPE_MIDI_GM | |
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SNDRV_SEQ_PORT_TYPE_HARDWARE | |
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SNDRV_SEQ_PORT_TYPE_SYNTHESIZER, |
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voices, voices, |
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name); |
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if (opl3->oss_chset->port < 0) { |
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int port; |
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port = opl3->oss_chset->port; |
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snd_midi_channel_free_set(opl3->oss_chset); |
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return port; |
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} |
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return 0; |
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} |
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/* ------------------------------ */ |
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/* register OSS synth */ |
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void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name) |
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{ |
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struct snd_seq_oss_reg *arg; |
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struct snd_seq_device *dev; |
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if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS, |
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sizeof(struct snd_seq_oss_reg), &dev) < 0) |
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return; |
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opl3->oss_seq_dev = dev; |
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strscpy(dev->name, name, sizeof(dev->name)); |
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arg = SNDRV_SEQ_DEVICE_ARGPTR(dev); |
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arg->type = SYNTH_TYPE_FM; |
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if (opl3->hardware < OPL3_HW_OPL3) { |
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arg->subtype = FM_TYPE_ADLIB; |
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arg->nvoices = MAX_OPL2_VOICES; |
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} else { |
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arg->subtype = FM_TYPE_OPL3; |
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arg->nvoices = MAX_OPL3_VOICES; |
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} |
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arg->oper = oss_callback; |
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arg->private_data = opl3; |
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if (snd_opl3_oss_create_port(opl3)) { |
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/* register to OSS synth table */ |
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snd_device_register(opl3->card, dev); |
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} |
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} |
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/* unregister */ |
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void snd_opl3_free_seq_oss(struct snd_opl3 *opl3) |
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{ |
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if (opl3->oss_seq_dev) { |
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/* The instance should have been released in prior */ |
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opl3->oss_seq_dev = NULL; |
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} |
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} |
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/* ------------------------------ */ |
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/* open OSS sequencer */ |
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static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure) |
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{ |
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struct snd_opl3 *opl3 = closure; |
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int err; |
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if (snd_BUG_ON(!arg)) |
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return -ENXIO; |
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if ((err = snd_opl3_synth_setup(opl3)) < 0) |
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return err; |
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/* fill the argument data */ |
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arg->private_data = opl3; |
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arg->addr.client = opl3->oss_chset->client; |
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arg->addr.port = opl3->oss_chset->port; |
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if ((err = snd_opl3_synth_use_inc(opl3)) < 0) |
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return err; |
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opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH; |
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return 0; |
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} |
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/* close OSS sequencer */ |
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static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg) |
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{ |
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struct snd_opl3 *opl3; |
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if (snd_BUG_ON(!arg)) |
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return -ENXIO; |
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opl3 = arg->private_data; |
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snd_opl3_synth_cleanup(opl3); |
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snd_opl3_synth_use_dec(opl3); |
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return 0; |
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} |
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/* load patch */ |
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/* from sound_config.h */ |
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#define SBFM_MAXINSTR 256 |
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static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, |
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const char __user *buf, int offs, int count) |
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{ |
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struct snd_opl3 *opl3; |
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struct sbi_instrument sbi; |
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char name[32]; |
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int err, type; |
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if (snd_BUG_ON(!arg)) |
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return -ENXIO; |
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opl3 = arg->private_data; |
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if (format == FM_PATCH) |
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type = FM_PATCH_OPL2; |
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else if (format == OPL3_PATCH) |
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type = FM_PATCH_OPL3; |
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else |
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return -EINVAL; |
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if (count < (int)sizeof(sbi)) { |
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snd_printk(KERN_ERR "FM Error: Patch record too short\n"); |
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return -EINVAL; |
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} |
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if (copy_from_user(&sbi, buf, sizeof(sbi))) |
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return -EFAULT; |
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if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) { |
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snd_printk(KERN_ERR "FM Error: Invalid instrument number %d\n", |
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sbi.channel); |
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return -EINVAL; |
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} |
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memset(name, 0, sizeof(name)); |
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sprintf(name, "Chan%d", sbi.channel); |
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err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL, |
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sbi.operators); |
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if (err < 0) |
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return err; |
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return sizeof(sbi); |
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} |
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/* ioctl */ |
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static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, |
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unsigned long ioarg) |
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{ |
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if (snd_BUG_ON(!arg)) |
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return -ENXIO; |
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switch (cmd) { |
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case SNDCTL_FM_LOAD_INSTR: |
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snd_printk(KERN_ERR "OPL3: " |
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"Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. " |
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"Fix the program.\n"); |
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return -EINVAL; |
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case SNDCTL_SYNTH_MEMAVL: |
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return 0x7fffffff; |
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case SNDCTL_FM_4OP_ENABLE: |
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// handled automatically by OPL instrument type |
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return 0; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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/* reset device */ |
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static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg) |
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{ |
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if (snd_BUG_ON(!arg)) |
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return -ENXIO; |
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return 0; |
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}
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