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linux/sound/drivers/opl4/opl4_lib.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

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