1 files changed, 419 insertions, 0 deletions

diff --git a/sound/oss/msnd.c b/sound/oss/msnd.c
new file mode 100644
index 000000000000..4f1ff1bccdce
--- /dev/null
+++ b/sound/oss/msnd.c
@@ -0,0 +1,419 @@
+/*********************************************************************
+ *
+ * msnd.c - Driver Base
+ *
+ * Turtle Beach MultiSound Sound Card Driver for Linux
+ *
+ * Copyright (C) 1998 Andrew Veliath
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: msnd.c,v 1.17 1999/03/21 16:50:09 andrewtv Exp $
+ *
+ ********************************************************************/
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <linux/spinlock.h>
+#include <asm/irq.h>
+#include "msnd.h"
+
+#define LOGNAME                 "msnd"
+
+#define MSND_MAX_DEVS           4
+
+static multisound_dev_t         *devs[MSND_MAX_DEVS];
+static int                      num_devs;
+
+int __init msnd_register(multisound_dev_t *dev)
+{
+        int i;
+
+        for (i = 0; i < MSND_MAX_DEVS; ++i)
+                if (devs[i] == NULL)
+                        break;
+
+        if (i == MSND_MAX_DEVS)
+                return -ENOMEM;
+
+        devs[i] = dev;
+        ++num_devs;
+        return 0;
+}
+
+void msnd_unregister(multisound_dev_t *dev)
+{
+        int i;
+
+        for (i = 0; i < MSND_MAX_DEVS; ++i)
+                if (devs[i] == dev)
+                        break;
+
+        if (i == MSND_MAX_DEVS) {
+                printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n");
+                return;
+        }
+
+        devs[i] = NULL;
+        --num_devs;
+}
+
+void msnd_init_queue(void __iomem *base, int start, int size)
+{
+        writew(PCTODSP_BASED(start), base + JQS_wStart);
+        writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
+        writew(0, base + JQS_wHead);
+        writew(0, base + JQS_wTail);
+}
+
+void msnd_fifo_init(msnd_fifo *f)
+{
+        f->data = NULL;
+}
+
+void msnd_fifo_free(msnd_fifo *f)
+{
+        if (f->data) {
+                vfree(f->data);
+                f->data = NULL;
+        }
+}
+
+int msnd_fifo_alloc(msnd_fifo *f, size_t n)
+{
+        msnd_fifo_free(f);
+        f->data = (char *)vmalloc(n);
+        f->n = n;
+        f->tail = 0;
+        f->head = 0;
+        f->len = 0;
+
+        if (!f->data)
+                return -ENOMEM;
+
+        return 0;
+}
+
+void msnd_fifo_make_empty(msnd_fifo *f)
+{
+        f->len = f->tail = f->head = 0;
+}
+
+int msnd_fifo_write_io(msnd_fifo *f, char __iomem *buf, size_t len)
+{
+        int count = 0;
+
+        while ((count < len) && (f->len != f->n)) {
+
+                int nwritten;
+
+                if (f->head <= f->tail) {
+                        nwritten = len - count;
+                        if (nwritten > f->n - f->tail)
+                                nwritten = f->n - f->tail;
+                }
+                else {
+                        nwritten = f->head - f->tail;
+                        if (nwritten > len - count)
+                                nwritten = len - count;
+                }
+
+                memcpy_fromio(f->data + f->tail, buf, nwritten);
+
+                count += nwritten;
+                buf += nwritten;
+                f->len += nwritten;
+                f->tail += nwritten;
+                f->tail %= f->n;
+        }
+
+        return count;
+}
+
+int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len)
+{
+        int count = 0;
+
+        while ((count < len) && (f->len != f->n)) {
+
+                int nwritten;
+
+                if (f->head <= f->tail) {
+                        nwritten = len - count;
+                        if (nwritten > f->n - f->tail)
+                                nwritten = f->n - f->tail;
+                }
+                else {
+                        nwritten = f->head - f->tail;
+                        if (nwritten > len - count)
+                                nwritten = len - count;
+                }
+
+                memcpy(f->data + f->tail, buf, nwritten);
+
+                count += nwritten;
+                buf += nwritten;
+                f->len += nwritten;
+                f->tail += nwritten;
+                f->tail %= f->n;
+        }
+
+        return count;
+}
+
+int msnd_fifo_read_io(msnd_fifo *f, char __iomem *buf, size_t len)
+{
+        int count = 0;
+
+        while ((count < len) && (f->len > 0)) {
+
+                int nread;
+
+                if (f->tail <= f->head) {
+                        nread = len - count;
+                        if (nread > f->n - f->head)
+                                nread = f->n - f->head;
+                }
+                else {
+                        nread = f->tail - f->head;
+                        if (nread > len - count)
+                                nread = len - count;
+                }
+
+                memcpy_toio(buf, f->data + f->head, nread);
+
+                count += nread;
+                buf += nread;
+                f->len -= nread;
+                f->head += nread;
+                f->head %= f->n;
+        }
+
+        return count;
+}
+
+int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len)
+{
+        int count = 0;
+
+        while ((count < len) && (f->len > 0)) {
+
+                int nread;
+
+                if (f->tail <= f->head) {
+                        nread = len - count;
+                        if (nread > f->n - f->head)
+                                nread = f->n - f->head;
+                }
+                else {
+                        nread = f->tail - f->head;
+                        if (nread > len - count)
+                                nread = len - count;
+                }
+
+                memcpy(buf, f->data + f->head, nread);
+
+                count += nread;
+                buf += nread;
+                f->len -= nread;
+                f->head += nread;
+                f->head %= f->n;
+        }
+
+        return count;
+}
+
+static int msnd_wait_TXDE(multisound_dev_t *dev)
+{
+        register unsigned int io = dev->io;
+        register int timeout = 1000;
+    
+        while(timeout-- > 0)
+                if (msnd_inb(io + HP_ISR) & HPISR_TXDE)
+                        return 0;
+
+        return -EIO;
+}
+
+static int msnd_wait_HC0(multisound_dev_t *dev)
+{
+        register unsigned int io = dev->io;
+        register int timeout = 1000;
+
+        while(timeout-- > 0)
+                if (!(msnd_inb(io + HP_CVR) & HPCVR_HC))
+                        return 0;
+
+        return -EIO;
+}
+
+int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&dev->lock, flags);
+        if (msnd_wait_HC0(dev) == 0) {
+                msnd_outb(cmd, dev->io + HP_CVR);
+                spin_unlock_irqrestore(&dev->lock, flags);
+                return 0;
+        }
+        spin_unlock_irqrestore(&dev->lock, flags);
+
+        printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n");
+
+        return -EIO;
+}
+
+int msnd_send_word(multisound_dev_t *dev, unsigned char high,
+                   unsigned char mid, unsigned char low)
+{
+        register unsigned int io = dev->io;
+
+        if (msnd_wait_TXDE(dev) == 0) {
+                msnd_outb(high, io + HP_TXH);
+                msnd_outb(mid, io + HP_TXM);
+                msnd_outb(low, io + HP_TXL);
+                return 0;
+        }
+
+        printk(KERN_DEBUG LOGNAME ": Send host word timeout\n");
+
+        return -EIO;
+}
+
+int msnd_upload_host(multisound_dev_t *dev, char *bin, int len)
+{
+        int i;
+
+        if (len % 3 != 0) {
+                printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n");         
+                return -EINVAL;
+        }
+
+        for (i = 0; i < len; i += 3)
+                if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0)
+                        return -EIO;
+
+        msnd_inb(dev->io + HP_RXL);
+        msnd_inb(dev->io + HP_CVR);
+
+        return 0;
+}
+
+int msnd_enable_irq(multisound_dev_t *dev)
+{
+        unsigned long flags;
+
+        if (dev->irq_ref++)
+                return 0;
+
+        printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n");
+
+        spin_lock_irqsave(&dev->lock, flags);
+        if (msnd_wait_TXDE(dev) == 0) {
+                msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR);
+                if (dev->type == msndClassic)
+                        msnd_outb(dev->irqid, dev->io + HP_IRQM);
+                msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
+                msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR);
+                enable_irq(dev->irq);
+                msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size);
+                spin_unlock_irqrestore(&dev->lock, flags);
+                return 0;
+        }
+        spin_unlock_irqrestore(&dev->lock, flags);
+
+        printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n");
+
+        return -EIO;
+}
+
+int msnd_disable_irq(multisound_dev_t *dev)
+{
+        unsigned long flags;
+
+        if (--dev->irq_ref > 0)
+                return 0;
+
+        if (dev->irq_ref < 0)
+                printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref);
+
+        printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n");
+
+        spin_lock_irqsave(&dev->lock, flags);
+        if (msnd_wait_TXDE(dev) == 0) {
+                msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
+                if (dev->type == msndClassic)
+                        msnd_outb(HPIRQ_NONE, dev->io + HP_IRQM);
+                disable_irq(dev->irq);
+                spin_unlock_irqrestore(&dev->lock, flags);
+                return 0;
+        }
+        spin_unlock_irqrestore(&dev->lock, flags);
+
+        printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n");
+
+        return -EIO;
+}
+
+#ifndef LINUX20
+EXPORT_SYMBOL(msnd_register);
+EXPORT_SYMBOL(msnd_unregister);
+
+EXPORT_SYMBOL(msnd_init_queue);
+
+EXPORT_SYMBOL(msnd_fifo_init);
+EXPORT_SYMBOL(msnd_fifo_free);
+EXPORT_SYMBOL(msnd_fifo_alloc);
+EXPORT_SYMBOL(msnd_fifo_make_empty);
+EXPORT_SYMBOL(msnd_fifo_write_io);
+EXPORT_SYMBOL(msnd_fifo_read_io);
+EXPORT_SYMBOL(msnd_fifo_write);
+EXPORT_SYMBOL(msnd_fifo_read);
+
+EXPORT_SYMBOL(msnd_send_dsp_cmd);
+EXPORT_SYMBOL(msnd_send_word);
+EXPORT_SYMBOL(msnd_upload_host);
+
+EXPORT_SYMBOL(msnd_enable_irq);
+EXPORT_SYMBOL(msnd_disable_irq);
+#endif
+
+#ifdef MODULE
+MODULE_AUTHOR                           ("Andrew Veliath <andrewtv@usa.net>");
+MODULE_DESCRIPTION                      ("Turtle Beach MultiSound Driver Base");
+MODULE_LICENSE("GPL");
+
+
+int init_module(void)
+{
+        return 0;
+}
+
+void cleanup_module(void)
+{
+}
+#endif