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-rw-r--r--sound/oss/emu10k1/cardmo.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/sound/oss/emu10k1/cardmo.c b/sound/oss/emu10k1/cardmo.c
new file mode 100644
index 00000000000..5938d31f9e2
--- /dev/null
+++ b/sound/oss/emu10k1/cardmo.c
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+/*
+ **********************************************************************
+ * cardmo.c - MIDI UART output HAL for emu10k1 driver
+ * Copyright 1999, 2000 Creative Labs, Inc.
+ *
+ **********************************************************************
+ *
+ * Date Author Summary of changes
+ * ---- ------ ------------------
+ * October 20, 1999 Bertrand Lee base code release
+ * November 2, 1999 Alan Cox cleaned up
+ *
+ **********************************************************************
+ *
+ * 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.
+ *
+ **********************************************************************
+ */
+
+#include <linux/slab.h>
+
+#include "hwaccess.h"
+#include "8010.h"
+#include "cardmo.h"
+#include "irqmgr.h"
+
+/* Installs the IRQ handler for the MPU out port *
+ * and initialize parameters */
+
+int emu10k1_mpuout_open(struct emu10k1_card *card, struct midi_openinfo *openinfo)
+{
+ struct emu10k1_mpuout *card_mpuout = card->mpuout;
+
+ DPF(2, "emu10k1_mpuout_open()\n");
+
+ if (!(card_mpuout->status & FLAGS_AVAILABLE))
+ return -1;
+
+ /* Copy open info and mark channel as in use */
+ card_mpuout->intr = 0;
+ card_mpuout->openinfo = *openinfo;
+ card_mpuout->status &= ~FLAGS_AVAILABLE;
+ card_mpuout->laststatus = 0x80;
+ card_mpuout->firstmidiq = NULL;
+ card_mpuout->lastmidiq = NULL;
+
+ emu10k1_mpu_reset(card);
+ emu10k1_mpu_acquire(card);
+
+ return 0;
+}
+
+int emu10k1_mpuout_close(struct emu10k1_card *card)
+{
+ struct emu10k1_mpuout *card_mpuout = card->mpuout;
+ struct midi_queue *midiq;
+ struct midi_hdr *midihdr;
+ unsigned long flags;
+
+ DPF(2, "emu10k1_mpuout_close()\n");
+
+ emu10k1_irq_disable(card, card->is_audigy ? A_INTE_MIDITXENABLE : INTE_MIDITXENABLE);
+
+ spin_lock_irqsave(&card_mpuout->lock, flags);
+
+ while (card_mpuout->firstmidiq != NULL) {
+ midiq = card_mpuout->firstmidiq;
+ midihdr = (struct midi_hdr *) midiq->refdata;
+
+ card_mpuout->firstmidiq = midiq->next;
+
+ kfree(midihdr->data);
+ kfree(midihdr);
+ kfree(midiq);
+ }
+
+ card_mpuout->lastmidiq = NULL;
+
+ emu10k1_mpu_release(card);
+
+ card_mpuout->status |= FLAGS_AVAILABLE;
+
+ spin_unlock_irqrestore(&card_mpuout->lock, flags);
+
+ return 0;
+}
+
+/* If there isn't enough buffer space, reject Midi Buffer. *
+* Otherwise, disable TX, create object to hold Midi *
+* uffer, update buffer flags and other parameters *
+* before enabling TX again. */
+
+int emu10k1_mpuout_add_buffer(struct emu10k1_card *card, struct midi_hdr *midihdr)
+{
+ struct emu10k1_mpuout *card_mpuout = card->mpuout;
+ struct midi_queue *midiq;
+ unsigned long flags;
+
+ DPF(2, "emu10k1_mpuout_add_buffer()\n");
+
+ if (card_mpuout->state == CARDMIDIOUT_STATE_SUSPEND)
+ return 0;
+
+ midihdr->flags |= MIDIBUF_INQUEUE;
+ midihdr->flags &= ~MIDIBUF_DONE;
+
+ if ((midiq = (struct midi_queue *) kmalloc(sizeof(struct midi_queue), GFP_KERNEL)) == NULL) {
+ /* Message lost */
+ return -1;
+ }
+
+ midiq->next = NULL;
+ midiq->qtype = 1;
+ midiq->length = midihdr->bufferlength;
+ midiq->sizeLeft = midihdr->bufferlength;
+ midiq->midibyte = midihdr->data;
+
+ midiq->refdata = (unsigned long) midihdr;
+
+ spin_lock_irqsave(&card_mpuout->lock, flags);
+
+ if (card_mpuout->firstmidiq == NULL) {
+ card_mpuout->firstmidiq = midiq;
+ card_mpuout->lastmidiq = midiq;
+ } else {
+ (card_mpuout->lastmidiq)->next = midiq;
+ card_mpuout->lastmidiq = midiq;
+ }
+
+ card_mpuout->intr = 0;
+
+ emu10k1_irq_enable(card, card->is_audigy ? A_INTE_MIDITXENABLE : INTE_MIDITXENABLE);
+
+ spin_unlock_irqrestore(&card_mpuout->lock, flags);
+
+ return 0;
+}
+
+void emu10k1_mpuout_bh(unsigned long refdata)
+{
+ struct emu10k1_card *card = (struct emu10k1_card *) refdata;
+ struct emu10k1_mpuout *card_mpuout = card->mpuout;
+ int cByteSent = 0;
+ struct midi_queue *midiq;
+ struct midi_queue *doneq = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&card_mpuout->lock, flags);
+
+ while (card_mpuout->firstmidiq != NULL) {
+ midiq = card_mpuout->firstmidiq;
+
+ while (cByteSent < 4 && midiq->sizeLeft) {
+ if (emu10k1_mpu_write_data(card, *midiq->midibyte) < 0) {
+ DPF(2, "emu10k1_mpuoutDpcCallback error!!\n");
+ } else {
+ ++cByteSent;
+ --midiq->sizeLeft;
+ ++midiq->midibyte;
+ }
+ }
+
+ if (midiq->sizeLeft == 0) {
+ if (doneq == NULL)
+ doneq = midiq;
+ card_mpuout->firstmidiq = midiq->next;
+ } else
+ break;
+ }
+
+ if (card_mpuout->firstmidiq == NULL)
+ card_mpuout->lastmidiq = NULL;
+
+ if (doneq != NULL) {
+ while (doneq != card_mpuout->firstmidiq) {
+ unsigned long callback_msg[3];
+
+ midiq = doneq;
+ doneq = midiq->next;
+
+ if (midiq->qtype) {
+ callback_msg[0] = 0;
+ callback_msg[1] = midiq->length;
+ callback_msg[2] = midiq->refdata;
+
+ emu10k1_midi_callback(ICARDMIDI_OUTLONGDATA, card_mpuout->openinfo.refdata, callback_msg);
+ } else if (((u8) midiq->refdata) < 0xF0 && ((u8) midiq->refdata) > 0x7F)
+ card_mpuout->laststatus = (u8) midiq->refdata;
+
+ kfree(midiq);
+ }
+ }
+
+ if ((card_mpuout->firstmidiq != NULL) || cByteSent) {
+ card_mpuout->intr = 0;
+ emu10k1_irq_enable(card, card->is_audigy ? A_INTE_MIDITXENABLE : INTE_MIDITXENABLE);
+ }
+
+ spin_unlock_irqrestore(&card_mpuout->lock, flags);
+
+ return;
+}
+
+int emu10k1_mpuout_irqhandler(struct emu10k1_card *card)
+{
+ struct emu10k1_mpuout *card_mpuout = card->mpuout;
+
+ DPF(4, "emu10k1_mpuout_irqhandler\n");
+
+ card_mpuout->intr = 1;
+ emu10k1_irq_disable(card, card->is_audigy ? A_INTE_MIDITXENABLE : INTE_MIDITXENABLE);
+
+ tasklet_hi_schedule(&card_mpuout->tasklet);
+
+ return 0;
+}
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