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Diffstat (limited to 'sound/drivers/opl4/opl4_lib.c')
-rw-r--r--sound/drivers/opl4/opl4_lib.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/sound/drivers/opl4/opl4_lib.c b/sound/drivers/opl4/opl4_lib.c
new file mode 100644
index 0000000000..035645eb5e
--- /dev/null
+++ b/sound/drivers/opl4/opl4_lib.c
@@ -0,0 +1,252 @@
+// 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 const 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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 11:16:24 +0000