253 lines
6.2 KiB
C
253 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Functions for accessing OPL4 devices
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* Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
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*/
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#include "opl4_local.h"
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#include <sound/initval.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/io.h>
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MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
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MODULE_DESCRIPTION("OPL4 driver");
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MODULE_LICENSE("GPL");
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static inline void snd_opl4_wait(struct snd_opl4 *opl4)
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{
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int timeout = 10;
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while ((inb(opl4->fm_port) & OPL4_STATUS_BUSY) && --timeout > 0)
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;
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}
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void snd_opl4_write(struct snd_opl4 *opl4, u8 reg, u8 value)
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{
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snd_opl4_wait(opl4);
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outb(reg, opl4->pcm_port);
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snd_opl4_wait(opl4);
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outb(value, opl4->pcm_port + 1);
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}
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EXPORT_SYMBOL(snd_opl4_write);
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u8 snd_opl4_read(struct snd_opl4 *opl4, u8 reg)
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{
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snd_opl4_wait(opl4);
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outb(reg, opl4->pcm_port);
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snd_opl4_wait(opl4);
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return inb(opl4->pcm_port + 1);
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}
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EXPORT_SYMBOL(snd_opl4_read);
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void snd_opl4_read_memory(struct snd_opl4 *opl4, char *buf, int offset, int size)
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{
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unsigned long flags;
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u8 memcfg;
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spin_lock_irqsave(&opl4->reg_lock, flags);
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memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
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snd_opl4_wait(opl4);
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outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
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snd_opl4_wait(opl4);
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insb(opl4->pcm_port + 1, buf, size);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
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spin_unlock_irqrestore(&opl4->reg_lock, flags);
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}
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EXPORT_SYMBOL(snd_opl4_read_memory);
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void snd_opl4_write_memory(struct snd_opl4 *opl4, const char *buf, int offset, int size)
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{
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unsigned long flags;
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u8 memcfg;
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spin_lock_irqsave(&opl4->reg_lock, flags);
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memcfg = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg | OPL4_MODE_BIT);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_HIGH, offset >> 16);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_MID, offset >> 8);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_ADDRESS_LOW, offset);
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snd_opl4_wait(opl4);
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outb(OPL4_REG_MEMORY_DATA, opl4->pcm_port);
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snd_opl4_wait(opl4);
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outsb(opl4->pcm_port + 1, buf, size);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, memcfg);
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spin_unlock_irqrestore(&opl4->reg_lock, flags);
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}
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EXPORT_SYMBOL(snd_opl4_write_memory);
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static void snd_opl4_enable_opl4(struct snd_opl4 *opl4)
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{
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outb(OPL3_REG_MODE, opl4->fm_port + 2);
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inb(opl4->fm_port);
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inb(opl4->fm_port);
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outb(OPL3_OPL3_ENABLE | OPL3_OPL4_ENABLE, opl4->fm_port + 3);
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inb(opl4->fm_port);
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inb(opl4->fm_port);
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}
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static int snd_opl4_detect(struct snd_opl4 *opl4)
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{
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u8 id1, id2;
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snd_opl4_enable_opl4(opl4);
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id1 = snd_opl4_read(opl4, OPL4_REG_MEMORY_CONFIGURATION);
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snd_printdd("OPL4[02]=%02x\n", id1);
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switch (id1 & OPL4_DEVICE_ID_MASK) {
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case 0x20:
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opl4->hardware = OPL3_HW_OPL4;
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break;
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case 0x40:
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opl4->hardware = OPL3_HW_OPL4_ML;
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break;
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default:
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return -ENODEV;
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}
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snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x00);
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snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0xff);
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id1 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_FM);
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id2 = snd_opl4_read(opl4, OPL4_REG_MIX_CONTROL_PCM);
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snd_printdd("OPL4 id1=%02x id2=%02x\n", id1, id2);
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if (id1 != 0x00 || id2 != 0xff)
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return -ENODEV;
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snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_FM, 0x3f);
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snd_opl4_write(opl4, OPL4_REG_MIX_CONTROL_PCM, 0x3f);
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snd_opl4_write(opl4, OPL4_REG_MEMORY_CONFIGURATION, 0x00);
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return 0;
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}
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#if IS_ENABLED(CONFIG_SND_SEQUENCER)
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static void snd_opl4_seq_dev_free(struct snd_seq_device *seq_dev)
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{
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struct snd_opl4 *opl4 = seq_dev->private_data;
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opl4->seq_dev = NULL;
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}
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static int snd_opl4_create_seq_dev(struct snd_opl4 *opl4, int seq_device)
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{
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opl4->seq_dev_num = seq_device;
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if (snd_seq_device_new(opl4->card, seq_device, SNDRV_SEQ_DEV_ID_OPL4,
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sizeof(struct snd_opl4 *), &opl4->seq_dev) >= 0) {
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strcpy(opl4->seq_dev->name, "OPL4 Wavetable");
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*(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(opl4->seq_dev) = opl4;
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opl4->seq_dev->private_data = opl4;
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opl4->seq_dev->private_free = snd_opl4_seq_dev_free;
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}
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return 0;
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}
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#endif
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static void snd_opl4_free(struct snd_opl4 *opl4)
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{
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snd_opl4_free_proc(opl4);
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release_and_free_resource(opl4->res_fm_port);
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release_and_free_resource(opl4->res_pcm_port);
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kfree(opl4);
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}
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static int snd_opl4_dev_free(struct snd_device *device)
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{
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struct snd_opl4 *opl4 = device->device_data;
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snd_opl4_free(opl4);
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return 0;
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}
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int snd_opl4_create(struct snd_card *card,
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unsigned long fm_port, unsigned long pcm_port,
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int seq_device,
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struct snd_opl3 **ropl3, struct snd_opl4 **ropl4)
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{
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struct snd_opl4 *opl4;
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struct snd_opl3 *opl3;
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int err;
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static const struct snd_device_ops ops = {
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.dev_free = snd_opl4_dev_free
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};
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if (ropl3)
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*ropl3 = NULL;
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if (ropl4)
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*ropl4 = NULL;
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opl4 = kzalloc(sizeof(*opl4), GFP_KERNEL);
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if (!opl4)
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return -ENOMEM;
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opl4->res_fm_port = request_region(fm_port, 8, "OPL4 FM");
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opl4->res_pcm_port = request_region(pcm_port, 8, "OPL4 PCM/MIX");
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if (!opl4->res_fm_port || !opl4->res_pcm_port) {
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snd_printk(KERN_ERR "opl4: can't grab ports 0x%lx, 0x%lx\n", fm_port, pcm_port);
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snd_opl4_free(opl4);
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return -EBUSY;
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}
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opl4->card = card;
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opl4->fm_port = fm_port;
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opl4->pcm_port = pcm_port;
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spin_lock_init(&opl4->reg_lock);
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mutex_init(&opl4->access_mutex);
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err = snd_opl4_detect(opl4);
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if (err < 0) {
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snd_opl4_free(opl4);
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snd_printd("OPL4 chip not detected at %#lx/%#lx\n", fm_port, pcm_port);
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return err;
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}
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err = snd_device_new(card, SNDRV_DEV_CODEC, opl4, &ops);
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if (err < 0) {
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snd_opl4_free(opl4);
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return err;
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}
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err = snd_opl3_create(card, fm_port, fm_port + 2, opl4->hardware, 1, &opl3);
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if (err < 0) {
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snd_device_free(card, opl4);
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return err;
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}
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/* opl3 initialization disabled opl4, so reenable */
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snd_opl4_enable_opl4(opl4);
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snd_opl4_create_mixer(opl4);
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snd_opl4_create_proc(opl4);
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#if IS_ENABLED(CONFIG_SND_SEQUENCER)
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opl4->seq_client = -1;
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if (opl4->hardware < OPL3_HW_OPL4_ML)
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snd_opl4_create_seq_dev(opl4, seq_device);
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#endif
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if (ropl3)
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*ropl3 = opl3;
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if (ropl4)
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*ropl4 = opl4;
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return 0;
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}
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EXPORT_SYMBOL(snd_opl4_create);
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