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Diffstat (limited to 'sound/drivers/opl3/opl3_lib.c')
-rw-r--r--sound/drivers/opl3/opl3_lib.c561
1 files changed, 561 insertions, 0 deletions
diff --git a/sound/drivers/opl3/opl3_lib.c b/sound/drivers/opl3/opl3_lib.c
new file mode 100644
index 00000000..33d9a857
--- /dev/null
+++ b/sound/drivers/opl3/opl3_lib.c
@@ -0,0 +1,561 @@
+/*
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>,
+ * Hannu Savolainen 1993-1996,
+ * Rob Hooft
+ *
+ * Routines for control of AdLib FM cards (OPL2/OPL3/OPL4 chips)
+ *
+ * Most if code is ported from OSS/Lite.
+ *
+ * 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
+ *
+ */
+
+#include <sound/opl3.h>
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <sound/minors.h>
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Hannu Savolainen 1993-1996, Rob Hooft");
+MODULE_DESCRIPTION("Routines for control of AdLib FM cards (OPL2/OPL3/OPL4 chips)");
+MODULE_LICENSE("GPL");
+
+extern char snd_opl3_regmap[MAX_OPL2_VOICES][4];
+
+static void snd_opl2_command(struct snd_opl3 * opl3, unsigned short cmd, unsigned char val)
+{
+ unsigned long flags;
+ unsigned long port;
+
+ /*
+ * The original 2-OP synth requires a quite long delay
+ * after writing to a register.
+ */
+
+ port = (cmd & OPL3_RIGHT) ? opl3->r_port : opl3->l_port;
+
+ spin_lock_irqsave(&opl3->reg_lock, flags);
+
+ outb((unsigned char) cmd, port);
+ udelay(10);
+
+ outb((unsigned char) val, port + 1);
+ udelay(30);
+
+ spin_unlock_irqrestore(&opl3->reg_lock, flags);
+}
+
+static void snd_opl3_command(struct snd_opl3 * opl3, unsigned short cmd, unsigned char val)
+{
+ unsigned long flags;
+ unsigned long port;
+
+ /*
+ * The OPL-3 survives with just two INBs
+ * after writing to a register.
+ */
+
+ port = (cmd & OPL3_RIGHT) ? opl3->r_port : opl3->l_port;
+
+ spin_lock_irqsave(&opl3->reg_lock, flags);
+
+ outb((unsigned char) cmd, port);
+ inb(opl3->l_port);
+ inb(opl3->l_port);
+
+ outb((unsigned char) val, port + 1);
+ inb(opl3->l_port);
+ inb(opl3->l_port);
+
+ spin_unlock_irqrestore(&opl3->reg_lock, flags);
+}
+
+static int snd_opl3_detect(struct snd_opl3 * opl3)
+{
+ /*
+ * This function returns 1 if the FM chip is present at the given I/O port
+ * The detection algorithm plays with the timer built in the FM chip and
+ * looks for a change in the status register.
+ *
+ * Note! The timers of the FM chip are not connected to AdLib (and compatible)
+ * boards.
+ *
+ * Note2! The chip is initialized if detected.
+ */
+
+ unsigned char stat1, stat2, signature;
+
+ /* Reset timers 1 and 2 */
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_TIMER1_MASK | OPL3_TIMER2_MASK);
+ /* Reset the IRQ of the FM chip */
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_IRQ_RESET);
+ signature = stat1 = inb(opl3->l_port); /* Status register */
+ if ((stat1 & 0xe0) != 0x00) { /* Should be 0x00 */
+ snd_printd("OPL3: stat1 = 0x%x\n", stat1);
+ return -ENODEV;
+ }
+ /* Set timer1 to 0xff */
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER1, 0xff);
+ /* Unmask and start timer 1 */
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_TIMER2_MASK | OPL3_TIMER1_START);
+ /* Now we have to delay at least 80us */
+ udelay(200);
+ /* Read status after timers have expired */
+ stat2 = inb(opl3->l_port);
+ /* Stop the timers */
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_TIMER1_MASK | OPL3_TIMER2_MASK);
+ /* Reset the IRQ of the FM chip */
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, OPL3_IRQ_RESET);
+ if ((stat2 & 0xe0) != 0xc0) { /* There is no YM3812 */
+ snd_printd("OPL3: stat2 = 0x%x\n", stat2);
+ return -ENODEV;
+ }
+
+ /* If the toplevel code knows exactly the type of chip, don't try
+ to detect it. */
+ if (opl3->hardware != OPL3_HW_AUTO)
+ return 0;
+
+ /* There is a FM chip on this address. Detect the type (OPL2 to OPL4) */
+ if (signature == 0x06) { /* OPL2 */
+ opl3->hardware = OPL3_HW_OPL2;
+ } else {
+ /*
+ * If we had an OPL4 chip, opl3->hardware would have been set
+ * by the OPL4 driver; so we can assume OPL3 here.
+ */
+ if (snd_BUG_ON(!opl3->r_port))
+ return -ENODEV;
+ opl3->hardware = OPL3_HW_OPL3;
+ }
+ return 0;
+}
+
+/*
+ * AdLib timers
+ */
+
+/*
+ * Timer 1 - 80us
+ */
+
+static int snd_opl3_timer1_start(struct snd_timer * timer)
+{
+ unsigned long flags;
+ unsigned char tmp;
+ unsigned int ticks;
+ struct snd_opl3 *opl3;
+
+ opl3 = snd_timer_chip(timer);
+ spin_lock_irqsave(&opl3->timer_lock, flags);
+ ticks = timer->sticks;
+ tmp = (opl3->timer_enable | OPL3_TIMER1_START) & ~OPL3_TIMER1_MASK;
+ opl3->timer_enable = tmp;
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER1, 256 - ticks); /* timer 1 count */
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* enable timer 1 IRQ */
+ spin_unlock_irqrestore(&opl3->timer_lock, flags);
+ return 0;
+}
+
+static int snd_opl3_timer1_stop(struct snd_timer * timer)
+{
+ unsigned long flags;
+ unsigned char tmp;
+ struct snd_opl3 *opl3;
+
+ opl3 = snd_timer_chip(timer);
+ spin_lock_irqsave(&opl3->timer_lock, flags);
+ tmp = (opl3->timer_enable | OPL3_TIMER1_MASK) & ~OPL3_TIMER1_START;
+ opl3->timer_enable = tmp;
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* disable timer #1 */
+ spin_unlock_irqrestore(&opl3->timer_lock, flags);
+ return 0;
+}
+
+/*
+ * Timer 2 - 320us
+ */
+
+static int snd_opl3_timer2_start(struct snd_timer * timer)
+{
+ unsigned long flags;
+ unsigned char tmp;
+ unsigned int ticks;
+ struct snd_opl3 *opl3;
+
+ opl3 = snd_timer_chip(timer);
+ spin_lock_irqsave(&opl3->timer_lock, flags);
+ ticks = timer->sticks;
+ tmp = (opl3->timer_enable | OPL3_TIMER2_START) & ~OPL3_TIMER2_MASK;
+ opl3->timer_enable = tmp;
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER2, 256 - ticks); /* timer 1 count */
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* enable timer 1 IRQ */
+ spin_unlock_irqrestore(&opl3->timer_lock, flags);
+ return 0;
+}
+
+static int snd_opl3_timer2_stop(struct snd_timer * timer)
+{
+ unsigned long flags;
+ unsigned char tmp;
+ struct snd_opl3 *opl3;
+
+ opl3 = snd_timer_chip(timer);
+ spin_lock_irqsave(&opl3->timer_lock, flags);
+ tmp = (opl3->timer_enable | OPL3_TIMER2_MASK) & ~OPL3_TIMER2_START;
+ opl3->timer_enable = tmp;
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TIMER_CONTROL, tmp); /* disable timer #1 */
+ spin_unlock_irqrestore(&opl3->timer_lock, flags);
+ return 0;
+}
+
+/*
+
+ */
+
+static struct snd_timer_hardware snd_opl3_timer1 =
+{
+ .flags = SNDRV_TIMER_HW_STOP,
+ .resolution = 80000,
+ .ticks = 256,
+ .start = snd_opl3_timer1_start,
+ .stop = snd_opl3_timer1_stop,
+};
+
+static struct snd_timer_hardware snd_opl3_timer2 =
+{
+ .flags = SNDRV_TIMER_HW_STOP,
+ .resolution = 320000,
+ .ticks = 256,
+ .start = snd_opl3_timer2_start,
+ .stop = snd_opl3_timer2_stop,
+};
+
+static int snd_opl3_timer1_init(struct snd_opl3 * opl3, int timer_no)
+{
+ struct snd_timer *timer = NULL;
+ struct snd_timer_id tid;
+ int err;
+
+ tid.dev_class = SNDRV_TIMER_CLASS_CARD;
+ tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
+ tid.card = opl3->card->number;
+ tid.device = timer_no;
+ tid.subdevice = 0;
+ if ((err = snd_timer_new(opl3->card, "AdLib timer #1", &tid, &timer)) >= 0) {
+ strcpy(timer->name, "AdLib timer #1");
+ timer->private_data = opl3;
+ timer->hw = snd_opl3_timer1;
+ }
+ opl3->timer1 = timer;
+ return err;
+}
+
+static int snd_opl3_timer2_init(struct snd_opl3 * opl3, int timer_no)
+{
+ struct snd_timer *timer = NULL;
+ struct snd_timer_id tid;
+ int err;
+
+ tid.dev_class = SNDRV_TIMER_CLASS_CARD;
+ tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
+ tid.card = opl3->card->number;
+ tid.device = timer_no;
+ tid.subdevice = 0;
+ if ((err = snd_timer_new(opl3->card, "AdLib timer #2", &tid, &timer)) >= 0) {
+ strcpy(timer->name, "AdLib timer #2");
+ timer->private_data = opl3;
+ timer->hw = snd_opl3_timer2;
+ }
+ opl3->timer2 = timer;
+ return err;
+}
+
+/*
+
+ */
+
+void snd_opl3_interrupt(struct snd_hwdep * hw)
+{
+ unsigned char status;
+ struct snd_opl3 *opl3;
+ struct snd_timer *timer;
+
+ if (hw == NULL)
+ return;
+
+ opl3 = hw->private_data;
+ status = inb(opl3->l_port);
+#if 0
+ snd_printk(KERN_DEBUG "AdLib IRQ status = 0x%x\n", status);
+#endif
+ if (!(status & 0x80))
+ return;
+
+ if (status & 0x40) {
+ timer = opl3->timer1;
+ snd_timer_interrupt(timer, timer->sticks);
+ }
+ if (status & 0x20) {
+ timer = opl3->timer2;
+ snd_timer_interrupt(timer, timer->sticks);
+ }
+}
+
+EXPORT_SYMBOL(snd_opl3_interrupt);
+
+/*
+
+ */
+
+static int snd_opl3_free(struct snd_opl3 *opl3)
+{
+ if (snd_BUG_ON(!opl3))
+ return -ENXIO;
+ if (opl3->private_free)
+ opl3->private_free(opl3);
+ snd_opl3_clear_patches(opl3);
+ release_and_free_resource(opl3->res_l_port);
+ release_and_free_resource(opl3->res_r_port);
+ kfree(opl3);
+ return 0;
+}
+
+static int snd_opl3_dev_free(struct snd_device *device)
+{
+ struct snd_opl3 *opl3 = device->device_data;
+ return snd_opl3_free(opl3);
+}
+
+int snd_opl3_new(struct snd_card *card,
+ unsigned short hardware,
+ struct snd_opl3 **ropl3)
+{
+ static struct snd_device_ops ops = {
+ .dev_free = snd_opl3_dev_free,
+ };
+ struct snd_opl3 *opl3;
+ int err;
+
+ *ropl3 = NULL;
+ opl3 = kzalloc(sizeof(*opl3), GFP_KERNEL);
+ if (opl3 == NULL) {
+ snd_printk(KERN_ERR "opl3: cannot allocate\n");
+ return -ENOMEM;
+ }
+
+ opl3->card = card;
+ opl3->hardware = hardware;
+ spin_lock_init(&opl3->reg_lock);
+ spin_lock_init(&opl3->timer_lock);
+
+ if ((err = snd_device_new(card, SNDRV_DEV_CODEC, opl3, &ops)) < 0) {
+ snd_opl3_free(opl3);
+ return err;
+ }
+
+ *ropl3 = opl3;
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_opl3_new);
+
+int snd_opl3_init(struct snd_opl3 *opl3)
+{
+ if (! opl3->command) {
+ printk(KERN_ERR "snd_opl3_init: command not defined!\n");
+ return -EINVAL;
+ }
+
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
+ /* Melodic mode */
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00);
+
+ switch (opl3->hardware & OPL3_HW_MASK) {
+ case OPL3_HW_OPL2:
+ opl3->max_voices = MAX_OPL2_VOICES;
+ break;
+ case OPL3_HW_OPL3:
+ case OPL3_HW_OPL4:
+ opl3->max_voices = MAX_OPL3_VOICES;
+ /* Enter OPL3 mode */
+ opl3->command(opl3, OPL3_RIGHT | OPL3_REG_MODE, OPL3_OPL3_ENABLE);
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_opl3_init);
+
+int snd_opl3_create(struct snd_card *card,
+ unsigned long l_port,
+ unsigned long r_port,
+ unsigned short hardware,
+ int integrated,
+ struct snd_opl3 ** ropl3)
+{
+ struct snd_opl3 *opl3;
+ int err;
+
+ *ropl3 = NULL;
+ if ((err = snd_opl3_new(card, hardware, &opl3)) < 0)
+ return err;
+ if (! integrated) {
+ if ((opl3->res_l_port = request_region(l_port, 2, "OPL2/3 (left)")) == NULL) {
+ snd_printk(KERN_ERR "opl3: can't grab left port 0x%lx\n", l_port);
+ snd_device_free(card, opl3);
+ return -EBUSY;
+ }
+ if (r_port != 0 &&
+ (opl3->res_r_port = request_region(r_port, 2, "OPL2/3 (right)")) == NULL) {
+ snd_printk(KERN_ERR "opl3: can't grab right port 0x%lx\n", r_port);
+ snd_device_free(card, opl3);
+ return -EBUSY;
+ }
+ }
+ opl3->l_port = l_port;
+ opl3->r_port = r_port;
+
+ switch (opl3->hardware) {
+ /* some hardware doesn't support timers */
+ case OPL3_HW_OPL3_SV:
+ case OPL3_HW_OPL3_CS:
+ case OPL3_HW_OPL3_FM801:
+ opl3->command = &snd_opl3_command;
+ break;
+ default:
+ opl3->command = &snd_opl2_command;
+ if ((err = snd_opl3_detect(opl3)) < 0) {
+ snd_printd("OPL2/3 chip not detected at 0x%lx/0x%lx\n",
+ opl3->l_port, opl3->r_port);
+ snd_device_free(card, opl3);
+ return err;
+ }
+ /* detect routine returns correct hardware type */
+ switch (opl3->hardware & OPL3_HW_MASK) {
+ case OPL3_HW_OPL3:
+ case OPL3_HW_OPL4:
+ opl3->command = &snd_opl3_command;
+ }
+ }
+
+ snd_opl3_init(opl3);
+
+ *ropl3 = opl3;
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_opl3_create);
+
+int snd_opl3_timer_new(struct snd_opl3 * opl3, int timer1_dev, int timer2_dev)
+{
+ int err;
+
+ if (timer1_dev >= 0)
+ if ((err = snd_opl3_timer1_init(opl3, timer1_dev)) < 0)
+ return err;
+ if (timer2_dev >= 0) {
+ if ((err = snd_opl3_timer2_init(opl3, timer2_dev)) < 0) {
+ snd_device_free(opl3->card, opl3->timer1);
+ opl3->timer1 = NULL;
+ return err;
+ }
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_opl3_timer_new);
+
+int snd_opl3_hwdep_new(struct snd_opl3 * opl3,
+ int device, int seq_device,
+ struct snd_hwdep ** rhwdep)
+{
+ struct snd_hwdep *hw;
+ struct snd_card *card = opl3->card;
+ int err;
+
+ if (rhwdep)
+ *rhwdep = NULL;
+
+ /* create hardware dependent device (direct FM) */
+
+ if ((err = snd_hwdep_new(card, "OPL2/OPL3", device, &hw)) < 0) {
+ snd_device_free(card, opl3);
+ return err;
+ }
+ hw->private_data = opl3;
+ hw->exclusive = 1;
+#ifdef CONFIG_SND_OSSEMUL
+ if (device == 0) {
+ hw->oss_type = SNDRV_OSS_DEVICE_TYPE_DMFM;
+ sprintf(hw->oss_dev, "dmfm%i", card->number);
+ }
+#endif
+ strcpy(hw->name, hw->id);
+ switch (opl3->hardware & OPL3_HW_MASK) {
+ case OPL3_HW_OPL2:
+ strcpy(hw->name, "OPL2 FM");
+ hw->iface = SNDRV_HWDEP_IFACE_OPL2;
+ break;
+ case OPL3_HW_OPL3:
+ strcpy(hw->name, "OPL3 FM");
+ hw->iface = SNDRV_HWDEP_IFACE_OPL3;
+ break;
+ case OPL3_HW_OPL4:
+ strcpy(hw->name, "OPL4 FM");
+ hw->iface = SNDRV_HWDEP_IFACE_OPL4;
+ break;
+ }
+
+ /* operators - only ioctl */
+ hw->ops.open = snd_opl3_open;
+ hw->ops.ioctl = snd_opl3_ioctl;
+ hw->ops.write = snd_opl3_write;
+ hw->ops.release = snd_opl3_release;
+
+ opl3->hwdep = hw;
+ opl3->seq_dev_num = seq_device;
+#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
+ if (snd_seq_device_new(card, seq_device, SNDRV_SEQ_DEV_ID_OPL3,
+ sizeof(struct snd_opl3 *), &opl3->seq_dev) >= 0) {
+ strcpy(opl3->seq_dev->name, hw->name);
+ *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(opl3->seq_dev) = opl3;
+ }
+#endif
+ if (rhwdep)
+ *rhwdep = hw;
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_opl3_hwdep_new);
+
+/*
+ * INIT part
+ */
+
+static int __init alsa_opl3_init(void)
+{
+ return 0;
+}
+
+static void __exit alsa_opl3_exit(void)
+{
+}
+
+module_init(alsa_opl3_init)
+module_exit(alsa_opl3_exit)
generated by cgit (git 2.34.1) at 2024-12-20 11:00:03 +0000