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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Interface for OSS sequencer emulation4 *5 * Copyright (C) 2000 Uros Bizjak <uros@kss-loka.si>6 */7 8#include <linux/export.h>9#include "opl3_voice.h"10 11static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure);12static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg);13static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg);14static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count);15static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg);16 17/* operators */18 19static const struct snd_seq_oss_callback oss_callback = {20 .owner = THIS_MODULE,21 .open = snd_opl3_open_seq_oss,22 .close = snd_opl3_close_seq_oss,23 .ioctl = snd_opl3_ioctl_seq_oss,24 .load_patch = snd_opl3_load_patch_seq_oss,25 .reset = snd_opl3_reset_seq_oss,26};27 28static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct,29 void *private_data, int atomic, int hop)30{31 struct snd_opl3 *opl3 = private_data;32 33 if (ev->type != SNDRV_SEQ_EVENT_OSS)34 snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset);35 return 0;36}37 38/* ------------------------------ */39 40static void snd_opl3_oss_free_port(void *private_data)41{42 struct snd_opl3 *opl3 = private_data;43 44 snd_midi_channel_free_set(opl3->oss_chset);45}46 47static int snd_opl3_oss_create_port(struct snd_opl3 * opl3)48{49 struct snd_seq_port_callback callbacks;50 char name[32];51 int voices, opl_ver;52 53 voices = (opl3->hardware < OPL3_HW_OPL3) ?54 MAX_OPL2_VOICES : MAX_OPL3_VOICES;55 opl3->oss_chset = snd_midi_channel_alloc_set(voices);56 if (opl3->oss_chset == NULL)57 return -ENOMEM;58 opl3->oss_chset->private_data = opl3;59 60 memset(&callbacks, 0, sizeof(callbacks));61 callbacks.owner = THIS_MODULE;62 callbacks.event_input = snd_opl3_oss_event_input;63 callbacks.private_free = snd_opl3_oss_free_port;64 callbacks.private_data = opl3;65 66 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;67 sprintf(name, "OPL%i OSS Port", opl_ver);68 69 opl3->oss_chset->client = opl3->seq_client;70 opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,71 SNDRV_SEQ_PORT_CAP_WRITE,72 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |73 SNDRV_SEQ_PORT_TYPE_MIDI_GM |74 SNDRV_SEQ_PORT_TYPE_HARDWARE |75 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,76 voices, voices,77 name);78 if (opl3->oss_chset->port < 0) {79 int port;80 port = opl3->oss_chset->port;81 snd_midi_channel_free_set(opl3->oss_chset);82 return port;83 }84 return 0;85}86 87/* ------------------------------ */88 89/* register OSS synth */90void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name)91{92 struct snd_seq_oss_reg *arg;93 struct snd_seq_device *dev;94 95 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS,96 sizeof(struct snd_seq_oss_reg), &dev) < 0)97 return;98 99 opl3->oss_seq_dev = dev;100 strscpy(dev->name, name, sizeof(dev->name));101 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);102 arg->type = SYNTH_TYPE_FM;103 if (opl3->hardware < OPL3_HW_OPL3) {104 arg->subtype = FM_TYPE_ADLIB;105 arg->nvoices = MAX_OPL2_VOICES;106 } else {107 arg->subtype = FM_TYPE_OPL3;108 arg->nvoices = MAX_OPL3_VOICES;109 }110 arg->oper = oss_callback;111 arg->private_data = opl3;112 113 if (snd_opl3_oss_create_port(opl3)) {114 /* register to OSS synth table */115 snd_device_register(opl3->card, dev);116 }117}118 119/* unregister */120void snd_opl3_free_seq_oss(struct snd_opl3 *opl3)121{122 if (opl3->oss_seq_dev) {123 /* The instance should have been released in prior */124 opl3->oss_seq_dev = NULL;125 }126}127 128/* ------------------------------ */129 130/* open OSS sequencer */131static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)132{133 struct snd_opl3 *opl3 = closure;134 int err;135 136 if (snd_BUG_ON(!arg))137 return -ENXIO;138 139 err = snd_opl3_synth_setup(opl3);140 if (err < 0)141 return err;142 143 /* fill the argument data */144 arg->private_data = opl3;145 arg->addr.client = opl3->oss_chset->client;146 arg->addr.port = opl3->oss_chset->port;147 148 err = snd_opl3_synth_use_inc(opl3);149 if (err < 0)150 return err;151 152 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH;153 return 0;154}155 156/* close OSS sequencer */157static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg)158{159 struct snd_opl3 *opl3;160 161 if (snd_BUG_ON(!arg))162 return -ENXIO;163 opl3 = arg->private_data;164 165 snd_opl3_synth_cleanup(opl3);166 167 snd_opl3_synth_use_dec(opl3);168 return 0;169}170 171/* load patch */172 173/* from sound_config.h */174#define SBFM_MAXINSTR 256175 176static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,177 const char __user *buf, int offs, int count)178{179 struct snd_opl3 *opl3;180 struct sbi_instrument sbi;181 char name[32];182 int err, type;183 184 if (snd_BUG_ON(!arg))185 return -ENXIO;186 opl3 = arg->private_data;187 188 if (format == FM_PATCH)189 type = FM_PATCH_OPL2;190 else if (format == OPL3_PATCH)191 type = FM_PATCH_OPL3;192 else193 return -EINVAL;194 195 if (count < (int)sizeof(sbi)) {196 dev_err(opl3->card->dev, "FM Error: Patch record too short\n");197 return -EINVAL;198 }199 if (copy_from_user(&sbi, buf, sizeof(sbi)))200 return -EFAULT;201 202 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) {203 dev_err(opl3->card->dev, "FM Error: Invalid instrument number %d\n",204 sbi.channel);205 return -EINVAL;206 }207 208 memset(name, 0, sizeof(name));209 sprintf(name, "Chan%d", sbi.channel);210 211 err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL,212 sbi.operators);213 if (err < 0)214 return err;215 216 return sizeof(sbi);217}218 219/* ioctl */220static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,221 unsigned long ioarg)222{223 struct snd_opl3 *opl3;224 225 if (snd_BUG_ON(!arg))226 return -ENXIO;227 opl3 = arg->private_data;228 switch (cmd) {229 case SNDCTL_FM_LOAD_INSTR:230 dev_err(opl3->card->dev,231 "OPL3: Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. Fix the program.\n");232 return -EINVAL;233 234 case SNDCTL_SYNTH_MEMAVL:235 return 0x7fffffff;236 237 case SNDCTL_FM_4OP_ENABLE:238 // handled automatically by OPL instrument type239 return 0;240 241 default:242 return -EINVAL;243 }244 return 0;245}246 247/* reset device */248static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg)249{250 if (snd_BUG_ON(!arg))251 return -ENXIO;252 253 return 0;254}255